CN104807737A - Tester for moisture-vapor transmission rate - Google Patents
Tester for moisture-vapor transmission rate Download PDFInfo
- Publication number
- CN104807737A CN104807737A CN201510229530.8A CN201510229530A CN104807737A CN 104807737 A CN104807737 A CN 104807737A CN 201510229530 A CN201510229530 A CN 201510229530A CN 104807737 A CN104807737 A CN 104807737A
- Authority
- CN
- China
- Prior art keywords
- dry gas
- output terminal
- body cavity
- vapor transmission
- mass flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 75
- 238000012360 testing method Methods 0.000 claims abstract description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 208000002925 dental caries Diseases 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Air Humidification (AREA)
Abstract
The invention discloses a tester for the moisture-vapor transmission rate. The tester comprises an enclosure, wherein a test platform is arranged on the enclosure and comprises a substrate; a test container is arranged on the substrate and is used for fixing a test sample; the test container is divided into a humidifying gas chamber and a drying gas chamber which are mutually independent by the test sample; a humidifying gas inlet pipe and a humidifying gas outlet pipe which are communicated with the humidifying gas chamber as well as a drying gas inlet pipe and a drying gas outlet pipe which are communicated with the drying gas chamber are also arranged on the enclosure; the drying gas inlet pipe is provided with a mass flow controller and a drying pipe and is connected with a gas source of high-purity nitrogen gas; the drying gas outlet pipe is provided with a moisture sensor and a one-way valve; the humidifying gas inlet pipe is provided with a mass flow controller and a moisture generator. The tester for the moisture-vapor transmission rate, provided by the invention, fills up the technical blank of the reality of circulating environment simulation and the widening of the measuring range.
Description
Technical field
The present invention relates to a kind of testing vapor transmission instrument.
Background technology
Food and medicine are the healthy closely bound up commodity with people, the packaging of these type of commodity not only requires that good looking appearance is pleasant, convenient and practical, the more important thing is and guarantee that content has stable, reliable quality in shelf life, prevent the decomposition caused due to the moisture absorption, gas leakage and illumination from going bad.Therefore, the packaging with barrier function is selected to be the key ensureing food and drug safety.
The barrier of wrappage is for specific permeable object, permeable object comprises common gas, water vapour, liquid, organism etc., refers to that material is penetrated through the barrier property arriving opposite side (being generally penetrate through material by high concentration side to enter low concentration side) by its side to specific permeable object.Narrow sense, comprise oxygen-barrier property and water vapor barrier.Because the fat in food and protein, effective constituent in medicine is easily hydrolyzed under water vapour existence condition, variable color, rotten, even produce toxicity, so have very important significance for the detection of food and drug packing material steam breathability.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of testing vapor transmission instrument, and concrete scheme of the present invention is as follows for achieving the above object:
A kind of testing vapor transmission instrument, comprise casing, described casing is provided with test platform, described test platform comprises substrate, described substrate is provided with test container, described test container is used for fixing test sample, and by described test sample book, described test container is divided into separate humidifier body cavity and dry gas body cavity;
Described casing is also provided with the humidified gases draft tube and humidified gases escape pipe that are communicated with described humidifier body cavity, and the dry gas draft tube be communicated with described dry gas body cavity and dry gas escape pipe;
Described dry gas draft tube is provided with mass flow controller, drying tube, and is connected with high pure nitrogen source of the gas, and described dry gas escape pipe is provided with moisture sensor and retaining valve;
Described humidified gases draft tube is provided with mass flow controller, humidity generator.
Preferably, described high pure nitrogen source of the gas is connected successively with described drying tube, the first two position two-way valve, four-way connection, an output terminal of described four-way connection is connected with nitrogen gas recovering apparatus, another two output terminals are connected to described mass flow controller, and two described mass flow controllers are connected to the both sides of described dry gas body cavity.
Preferably, described dry gas body cavity is made up of two cavitys be communicated with, and one of them cavity is provided with condensation-water drain.
Preferably, the output terminal of described nitrogen gas recovering apparatus is connected with the mass flow controller of described humidified gases draft tube, the output terminal of described mass flow controller is connected with the first two position three-way valve, an output terminal of described first two position three-way valve is connected with the first three-way connection, an output terminal of described first three-way connection is connected to moisture variable valve, another output terminal is connected to dry gas variable valve, described moisture variable valve and described dry gas variable valve are all connected to the second three-way connection, the output terminal of described second three-way connection is connected to the second two position three-way valve by humidity generator, another input end of described second two position three-way valve and another output terminal of described first two position three-way valve, the output terminal of described second two position three-way valve is connected to humidifier body cavity.
Preferably, described moisture sensor both sides are respectively equipped with retaining valve.
Preferably, also attemperating unit is provided with below described test container.
Testing vapor transmission instrument provided by the invention, in the circulation authenticity of environmental simulation and the broadness of measurement range, has filled up technological gap.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, does not form inappropriate limitation of the present invention, in the accompanying drawings:
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is embodiment of the present invention humidifier body cavity gas circuit schematic diagram;
Fig. 3 is embodiment of the present invention dry gas body cavity gas circuit schematic diagram.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
As shown in FIG. 1 to 3, a kind of testing vapor transmission instrument, comprise casing 10, described casing 10 is provided with test platform, described test platform comprises substrate 11, described substrate 11 is provided with test container, and described test container is used for fixing test sample 14, and by described test sample book 14, described test container is divided into separate humidifier body cavity 12 and dry gas body cavity 13; Described casing 10 is also provided with the humidified gases draft tube and humidified gases escape pipe that are communicated with described humidifier body cavity 12, and the dry gas draft tube be communicated with described dry gas body cavity 13 and dry gas escape pipe; Described dry gas draft tube is provided with mass flow controller, drying tube, and is connected with high pure nitrogen source of the gas, and described dry gas escape pipe is provided with moisture sensor and retaining valve; Described humidified gases draft tube is provided with mass flow controller, humidity generator.
This product adopts the test philosophy of electrolytic process, utilize sample to be fixed in the middle of test chamber to divide humidifier body cavity 12 and dry gas body cavity 13 two chambeies by test chamber, flow at the humidifier body cavity 12 of film containing the gas stablizing relative humidity, dry gas flows at the dry gas body cavity 13 of film, hydrone is diffused in the dry gas of opposite side through sample, be carried into sensor by the gas flowed, by sensor measurement to vapour concentration analyze, thus calculate steam transit dose.
In the present embodiment scheme, described high pure nitrogen source of the gas 1 is connected successively with described drying tube 2, first two position two-way valve 3, four-way connection 4, an output terminal of described four-way connection 4 is connected with nitrogen gas recovering apparatus 5, another two output terminals are connected to the both sides that described mass flow controller 6, two described mass flow controllers 6 are connected to described dry gas body cavity 13.
As the improvement of above-described embodiment scheme, described dry gas body cavity 13 is made up of two cavitys be communicated with, and one of them cavity is provided with condensation-water drain.Water vapour permeability analyzer adopts ultrasonic humidifier to produce water vapour, although this water vapour occurring mode speed is fast, can cause damage if the water droplet that may contain in water vapour enters in gas circuit to sensor.In order to settle the matter once and for all, project team is intended redesigning water vapour occurring mode.First attempt adopting waterproof ventilated membrane hose type steam generator, found that the wet gas current that this device produces cannot reach the humid control area requirement of expecting in design.Secondly attempt carrying out limited heating to water vapour generation cavity, intend by increasing water vapour generation speed, control wet object on a large scale to realize instrument, result but finds that this mode exacerbates the generation of condensate water.Finally by test of many times, project team adopts two individual cavity design to achieve the goal.Namely, when moisture is by first cavity, the water droplet that may contain in moisture is separated, and the condensation-water drain through cavity bottom is discharged.The moisture isolating condensate water enters in second cavity, and then enters moisture sensor.On the other hand, the volume of two individual cavity is only 1/3rd of the wet chamber of tradition control, and it is less that this makes it take up room, and is conducive to the volume reducing water vapour permeability analyzer.
In the present embodiment scheme, the output terminal of described nitrogen gas recovering apparatus 5 is connected with the mass flow controller 6 of described humidified gases draft tube, the output terminal of described mass flow controller 6 is connected with the first two position three-way valve 8, an output terminal of described first two position three-way valve 8 is connected with the first three-way connection 9, an output terminal of described first three-way connection 9 is connected to moisture variable valve 15, another output terminal is connected to dry gas variable valve 16, described moisture variable valve 15 is all connected to the second three-way connection 17 with described dry gas variable valve 16, the output terminal of described second three-way connection 17 is connected to the second two position three-way valve 19 by humidity generator 18, another input end of described second two position three-way valve 19 is connected with another output terminal of described first two position three-way valve 8, the output terminal of described second two position three-way valve 19 is connected to humidifier body cavity 12.
As the improvement of above-described embodiment scheme, described moisture sensor 20 both sides are respectively equipped with retaining valve 21, to improve the measuring accuracy of moisture sensor.
As the improvement of above-described embodiment scheme, below described test container, be also provided with attemperating unit 22.
In order to eliminate residuary water steam in gas circuit to the harmful effect of test process, before the water vapour test of material is carried out, first to carry out bypass, determining " bypass time " value.Design adopts humidifier body cavity 12 and the dry gas body cavity 13 of the purged with nitrogen flow system of about 50ml/min, when ensureing sample both sides equipressure, has accelerated " purging " process.For in traditional water vapour permeability mensuration process, the judgement of bypass time mainly relies on the experience of operator, thus affect the situation of test result accuracy, area (or volume) parameter of the experience of research staff's long term accumulation and sample is summarized as some control laws by system, then judges " bypass time value " according to control law.After reaching the bypass time, the nitrogen flow of upper and lower cavity is all adjusted to the 15ml/min of regulation in GB/T 19789-2005 by system automatically, completes the follow-up flushing to sensor.Compared with the method for traditional permanent flow control, the design has the advantages such as reliability is high, strong adaptability.
Above the technical scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and embodiment, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, embodiment and range of application all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. a testing vapor transmission instrument, is characterized in that:
Comprise casing, described casing is provided with test platform, and described test platform comprises substrate, and described substrate is provided with test container, described test container is used for fixing test sample, and by described test sample book, described test container is divided into separate humidifier body cavity and dry gas body cavity;
Described casing is also provided with the humidified gases draft tube and humidified gases escape pipe that are communicated with described humidifier body cavity, and the dry gas draft tube be communicated with described dry gas body cavity and dry gas escape pipe;
Described dry gas draft tube is provided with mass flow controller, drying tube, and is connected with high pure nitrogen source of the gas, and described dry gas escape pipe is provided with moisture sensor and retaining valve;
Described humidified gases draft tube is provided with mass flow controller, humidity generator.
2. testing vapor transmission instrument as claimed in claim 1, is characterized in that:
Described high pure nitrogen source of the gas is connected successively with described drying tube, the first two position two-way valve, four-way connection, an output terminal of described four-way connection is connected with nitrogen gas recovering apparatus, another two output terminals are connected to described mass flow controller, and two described mass flow controllers are connected to the both sides of described dry gas body cavity.
3. testing vapor transmission instrument as claimed in claim 2, is characterized in that:
Described dry gas body cavity is made up of two cavitys be communicated with, and one of them cavity is provided with condensation-water drain.
4. testing vapor transmission instrument as claimed in claim 2, is characterized in that:
The output terminal of described nitrogen gas recovering apparatus is connected with the mass flow controller of described humidified gases draft tube, the output terminal of described mass flow controller is connected with the first two position three-way valve, an output terminal of described first two position three-way valve is connected with the first three-way connection, an output terminal of described first three-way connection is connected to moisture variable valve, another output terminal is connected to dry gas variable valve, described moisture variable valve and described dry gas variable valve are all connected to the second three-way connection, the output terminal of described second three-way connection is connected to the second two position three-way valve by humidity generator, another input end of described second two position three-way valve and another output terminal of described first two position three-way valve, the output terminal of described second two position three-way valve is connected to humidifier body cavity.
5. testing vapor transmission instrument as claimed in claim 1, is characterized in that:
Described moisture sensor both sides are respectively equipped with retaining valve.
6. testing vapor transmission instrument as claimed in claim 1, is characterized in that:
Also attemperating unit is provided with below described test container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229530.8A CN104807737A (en) | 2015-05-08 | 2015-05-08 | Tester for moisture-vapor transmission rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229530.8A CN104807737A (en) | 2015-05-08 | 2015-05-08 | Tester for moisture-vapor transmission rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104807737A true CN104807737A (en) | 2015-07-29 |
Family
ID=53692756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510229530.8A Pending CN104807737A (en) | 2015-05-08 | 2015-05-08 | Tester for moisture-vapor transmission rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104807737A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101809427A (en) * | 2007-09-28 | 2010-08-18 | 株式会社爱发科 | Device for measuring steam permeability, and method for the device |
| CN102252939A (en) * | 2010-05-21 | 2011-11-23 | 广州标际包装设备有限公司 | Testing apparatus for testing air permeability of high barrier film |
| CN204666473U (en) * | 2015-05-08 | 2015-09-23 | 广州标际包装设备有限公司 | Testing vapor transmission instrument |
-
2015
- 2015-05-08 CN CN201510229530.8A patent/CN104807737A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101809427A (en) * | 2007-09-28 | 2010-08-18 | 株式会社爱发科 | Device for measuring steam permeability, and method for the device |
| CN102252939A (en) * | 2010-05-21 | 2011-11-23 | 广州标际包装设备有限公司 | Testing apparatus for testing air permeability of high barrier film |
| CN204666473U (en) * | 2015-05-08 | 2015-09-23 | 广州标际包装设备有限公司 | Testing vapor transmission instrument |
Non-Patent Citations (3)
| Title |
|---|
| 中国电子学会敏感技术分会: "《传感器与执行器大全 1998/1999年卷 传感器•变送器•执行器》", 31 March 1999, 电子工业出版社 * |
| 吕艳娜: "等压法氧气透过率测定仪的温湿度控制技术研究", 《中国包装》 * |
| 赵江: "食品包装容器透氧量的测试", 《食品工业》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103471951B (en) | A kind of weightening finish method water vapor transmittance analyzer | |
| CN106461592B (en) | Gas component concentration measuring apparatus and method for measuring gas component concentration | |
| CN104502555B (en) | A kind of portable intelligent fruits and vegetables respiratory intensity determinator and assay method | |
| CN103028332B (en) | High-temperature standard humidity generation device | |
| CN104792365A (en) | Sulfur hexafluoride gas quality field integrated detector and detection method | |
| CN103854950A (en) | Membrane sample injection ionic migration spectrum gas path | |
| CA2541393A1 (en) | Gas injection amount determining method in isotope gas analysis, and isotope gas analyzing and measuring method and apparatus | |
| CN108970429A (en) | A kind of air distributing device and air distributing method of low concentration calibrating gas | |
| CN104777090A (en) | Oxygen permeation analysis tester | |
| CN105547898A (en) | Water vapor permeability tester adopting weight-reducing method | |
| CN204666473U (en) | Testing vapor transmission instrument | |
| Koller et al. | A null-point compensating system for simultaneous and continuous measurement of net photosynthesis and transpiration by controlled gas-stream analysis | |
| CN203479652U (en) | Water vapor transmission rate tester employing desiccant method | |
| CN208799973U (en) | A kind of air distributing device of low concentration calibrating gas | |
| CN205138968U (en) | Pass through oxygen analyzer tester | |
| CN104807737A (en) | Tester for moisture-vapor transmission rate | |
| CN104535725B (en) | Monitoring system | |
| CN203849086U (en) | Dehumidifying tube for atmosphere sampling-measuring instrument | |
| CN106110913B (en) | Standard air flow-producing device | |
| CN207662834U (en) | Gas generating unit, air distributing device and gas-detecting device | |
| CN209841821U (en) | Detection device for residual sulfur dioxide in edible fungi | |
| CN204241492U (en) | Alcohol content of exhalation gas detector calibrating installation | |
| CN204405638U (en) | A kind of portable intelligent fruits and vegetables respiratory intensity determinator | |
| CN204613011U (en) | A kind of SF 6hF Standard Gases device for formulating in gas | |
| CN206877169U (en) | Wet measuring and controlling device is controlled in inflation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |
|
| RJ01 | Rejection of invention patent application after publication |