Labthink Instruments Co.,Ltd.

*The R&D Progress of Reference Films in the Domestic Permeability Test Field
Abstract: this article states the present data status of the permeability test field, points out the importance and necessity of the unification of permeability test data system, and introduces the present domestic status and progress in the R&D of permeability reference films.
Key Words: reference films, calibration, comparison, permeability, transmission rate calibration system

*The Temperature Factor and New Trends for the Sealing Performance Test of Flexible Packages
Abstract: this article introduces the sealing performance test methods of flexible packages and the critical factors. Meanwhile, a detailed introduction of new test technological progress and applications is put forward as per market demands.
Key Words: leakage, sealing, package, storage, broken package

*Antimicrobial Packaging Technologies and Testing Emphases
Abstract: this article briefs the advantages of antimicrobial package, its working principle and the testing importance for it. The permeability testing method for gaseous state antimicrobial agent against antimicrobial packaging material is also introduced, and the importance of such permeability testing is testified with data.
Key words: permeability, antimicrobial package, gaseous state, antimicrobial agent, organic gas

*Present Situation and Trend of Permeation Testing
Abstract: this article introduces the present situation of permeation testing, and evaluates on the hotspot as well as the prospect of the permeation testing. Meanwhile, this article proposes some hints on how to select instruments.
Key Words: permeation, precision, measurement, instrument selection, measuring range

*The Analysis and Testing on the Relationship between Food Packages and Food Quality Guarantee Period
Abstract: the most important function of the packages is to guarantee the quality of the food during quality guarantee period. However, there has been no standard and regulations on how to select food packaging materials and what the requirements are. This article, on the aspect of the key factors influencing food safety, discusses on the relationship between food packages and food quality guarantee period.
Key Words: quality guarantee period, transmission rate, food, microorganism, sodas

*Testing Control Solutions for Candy Packaging Quality
Abstract:

*Development of Integral Package Barrier Property Testing
Abstract: The varied shapes of packages are one of the obstacles for their integral barrier property testing. With the development of barrier property testing technology, the technique for integral package barrier property testing has also made great progress with various kinds of testable packages. This article makes a detailed introduction of the development of integral package barrier property testing and relevant testing cases.
Key Words: package, transmission rate, pouches, blister, differential pressure method

*Special Gas Transmission Rate Testing Methods and Instrument Choice
Abstract: gas transmission rate of special gases is very practical with great testing demands. However, owing to the different characteristics of different gases, how to test gas transmission rate of special gases, what are the relevant methodologies and how to select testing methods and instruments are the experiences that need to be summarized in actual testing. The author integrates gas characteristics and the relevant testing information, and makes introductions to special gas transmission rate methods with testing advices.
Key Words: special gas, transmission rate, organic gas, differential pressure method, isostatic method

*The Analysis and Test of Key Index of Multi-chamber Infusion Bags
Abstract: multi-chamber infusion bag is one of the main trends in future soft plastic infusion bags. Multi-chamber bags own many incomparable advantages against infusion bottles and single-chamber bags. ‘Rosin joint’ technique is the key technology of contemporary multi-chamber bags. The barrier property of infusion bags is the key data to assess the safety of medicine. This article intends to introduce the analysis method of multi-chamber infusion bags index.
Key Words: multi-chamber, infusion bags, non-PVC, rosin joint, barrier property

*The Test Items and Methods for Cosmetic Packaging
Abstract: Flexible plastic packaging is gradually taking the place of traditional glassware packaging in cosmetic industry. However the in some aspects the performance of flexible plastic is not as good as glassware. How to ensure the quality of cosmetic packaging? This paper will introduce cosmetic packaging, and the factors influencing the preservation and marketing of cosmetics. Respectively advices will be given.
Key Words: cosmetics, barrier, headspace, sealing, pressure-sensitive adhesive

*The Causal Factors of Gases Composition Change inside Packages
Abstract: the actual effect of packaging is sometimes different from what has been expected. This is mainly because of the change of gases composition inside packages. This article will introduce the causal factors of such gases composition change and its test methods in details.
Key Words: food, medicine, headspace, sealing, barrier property test

*Injection Liquid Bag Barrier Test Requirements and Prospect
Abstract: the differential pressure method and equal pressure method are both necessary in the injection liquid bag test. As it is a burden to companies and institutions to buy two sets of equipments, Labthink introduced PERME-DM2/330 double methods gas permeation testing instrument, as a better option for medical packaging system and injection liquid bag manufacturers.
Key Words: injection liquid bags, transfusion use film, oxygen permeation rate, nitrogen permeation rate, soft plastic

*The Relationship between the Hot Tack of Packaging Material and Filling Efficiency
Abstract: This paper introduces the difference and relationship between the hot tack and ultimate strength. It uses example to introduce the close relationship between hot tack and choices of filling product line.
Key Words: hot sealing performance, hot tack, filling, the bag break, efficiency

*Non- Oxygen Conventional Gases Permeability Analysis
Abstract: By testing the permeability of specific ratio of oxygen through certain material, the permeability of other gases through the same material could be estimated. This method is applicable, but there is deviation between the test result and the actual situation. The extent of such deviation and its casual factors has been noticed by many experts. This article will introduce the test method of non-oxygen conventional gases permeability. It will also discuss the accuracy and the rationality of the test by theoretic analysis and practical test.
Key Words: ventilation, ratio, estimation, carbon dioxide, helium

*Headspace Gas Analysis and Quality Control
Abstract: This paper introduces the relationship between packaging headspace gas analysis and product shelf-life. It also introduced a number of issues concerning purchasing the headspace gas analyzer.
Key Words: headspace, gas analysis, packaging, carbon dioxide, oxygen

*Advantages of Expansion Heat Seal Strength Test of Flexible Packages Using Restraining Plates
Abstract: sealablity of flexible package can be indicated by its integrality and sealability of heat seal edges, and index that indicates heat sealability is heat seal strength. However in practical applications, there is no common recognition about how to get heat seal strength that indicates sealability of flexible package in test. This paper introduces the differences between expansion heat seal strength and tension heat seal strength and advantages of restraining plates tester.
Key Words: flexible package, heat seal, restraining plate, expansion heat seal strength, tension heat seal strength

*Plastic Flexible Package Sealing Capability Document: Testing Sealing Capability of Flexible Package Bags Using LSSD
Abstract: LSSD is applicable in the measurement of heat seal strength, the quality of heat seal, the burst pressure and the seal-leakage character of each heat seal edges of the flexible packages that are made using various kinds of heat seal techniques; the measurements of leak characters for all kinds of plastic pilferproof closures; the measurements of the unitary airproof character, compression resistance strength, cap body joint strength, cap disengaging strength, seal strength of edge, butting strength of various flexible tubes; at the same time, it can also provide evaluating and analysis for the compression and burst resistance strength of the materials of flexible package bags, the torsional airproof index of cap, the cap joint and disengaging strength, the stress strength; as well as the airproof character, the compression resistance character, the burst resistance character of unitary bottle, and so on.
Key Words: flexible package, heat seal, open package, closed package, leak

*Material Gas Penetration Property Document: Overview the Relationship between Pressure Difference and Gas Penetration Property of Material Scientifically
Abstract: This paper analyzes the mistaken views which believe in the fact that the existence of pressure difference in differential-pressure method would affect the results of gas penetration property test. Then, this paper demonstrates that pressure difference between two sides of specimen would not affect the gas penetration property of material (gas penetration amount and gas penetration coefficient) with sufficient testing data.
Key Words: pressure difference, differential-pressure method, compressive strength, gas penetration amount, gas penetration coefficient

*Flexible packaging Permeability document: The Applications of DATA-CURVE-FITTING for Flexible Packaging Permeability Tests
Abstract: With regards to the industries of food, pharmaceutics, cosmetic, most of daily chemical and part of other industry productions, high barrier packaging materials are remarkably effective in prolonging the shelf life and improving the preservation quality of packaging contents. However, the barrier property of such materials can be changed with the influence of environment factors, particularly, in the regard of temperature. Meanwhile, because differences exist in molecule arrangement in polymer for various kinds of materials, the regularities of change in barrier property with respect to temperature fluctuation varies for different materials. Thus, we should test and analyze the temperature influence on each kind of material independently. Even though we know the regularities of some materials that barrier property links with the temperature, it is still undoable in getting the permeability parameters for one kind of material by taking the data of other similar kinds of materials at specifically temperature for reference. Furthermore, permeability tests can be easily operated at routine temperature directly (e.g.: 10~50℃), whereas it tends to be very difficult and costly to run such tests at non-routine temperature (e.g.: refrigeration temperature, high temperature for sterilization, etc.). Carrying out permeability tests at non-routine temperature needs the equipments with superexcellent temperature resistance, such as good heat resistance or cold resistance, as well as that operator needs to actualize the ideal test environment at such temperature. Mistakes can be often made in packaging materials chosen caused by taking the barrier property of materials at routine temperature into account only. At the same time, severe pecuniary loss will be followed these kinds of mistakes as well. In this way, barrier property of materials at non-routine temperature becomes very useful in the field of practical application. The DATA-CURVE-FITTING methodology could be the way out to such puzzle of matching up the best use of barrier materials with packaging at different temperature, especially the non-routine ones. Based on film permeation theory applied broad, the DATA-CURVE-FITTING methodology can be used to obtain the permeability parameters of barrier materials at non-routine temperature easily and economically by analyzing the permeability data got in tests operated at routine temperature based on such method and the model of film permeation theory without actualizing the appointed test environment of non-routine temperature costly. This DATA-CURVE-FITTING methodology for permeability test has been proven to be highly scientific and objective through observations on a large number of actual testing data.
Key Words: DATA-CURVE-FITTING, permeability, packaging materials, non-routine temperature, flexible packaging

*Labthink Labs & Services---------Ultra-High&Low Temperature Lab
Abstract: This paper introduces the necessity of barrier capability test for packaging material under unconventional temperature and testing method in details; and Labthink Ultra-High & Low Temperature Lab and its services.
Key Words: unconventional temperature, barrier capability, oxygen permeation amount, test

*Labthink Lab and Service--------Organic Vapor Permeability Lab
Abstract: this paper introduces the necessity of aromatic vapor permeability test and its testing methods, together with the functions and services of organic vapor permeability lab and the organic vapor permeability tests.
Key words: aromatic vapor, barrier property, permeant amount, NON-FICK permeance, test

*Nitrogen Gas Packing Functions Document: Packing Functions and Relevant Test of Nitrogen Gas
Abstract: this paper details the packing functions of nitrogen gas in modified air package with explanations for relevant test items. It presents the methods adopted in nitrogen gas permeability test and some precautions.
Keywords: nitrogen gas, nitrogen gas permeability, modified gas package, vacuum package

*Flex Package Durability Document: Quantitative Measuring of Flex Durability
Abstract: Flex Durability of materials is a new testing item emerging with the increasing demand on packaging. This article introduces the demand, development, and quantitative measuring method relating flex durability. Furthermore, the necessity to measure flex durability quantitatively is explained based on field test data.
Keywords: flexible package, Flex Durability, barrier property

*Plastic Material Barrier Property Document:Significance of Proficiency Testing of Plastic Packaging Material Barrier Property Testing
Abstract: The problem of data inconsistency among barrier property tests still exists. Minor differences can lead to significant economical losses, even safety problems of products. This paper mainly talks about the methods of unifying barrier property testing data system and the demands in choosing standard film.
Key words: barrier property, oxygen transmission rate, water vapor transmission rate, calibration, standard film

*Plastic Film Barrier Document: Data System Unification for Barrier Capability Testing
Abstract: The problem of data inconsistency among barrier property tests still exists. Minor differences can lead to significant economical losses, even safety accident of products. This paper mainly talks about the methods of unifying barrier property testing data system and the demands in choosing standard film.
Key words: barrier property, oxygen transmission rate, water vapor transmission rate, calibration, standard film

*Plastic Film Reference Material Gas Permeability Document:Reference Material Used in the Calibration of Gas Permeability Test
Abstract: this paper discuss and elaborates on the elaborates on the source, the requirements and the application of reference material being employed in the calibration of gas permeability test, based on the classification and requirements of standard materials as well as the NIST introduction to standard film material. Since standard material or standard measuring device is essential for calibration, how to calibrate permeability testing instruments was once a factor impeding the development of permeability testing. Calibration methods have now become very mature. Instrument can be calibrated with reference material, standard gas or standard devices such as manometer, and standard weights.
Key words: equal-pressure method, calibration, reference material, standard material

*Plastic Film Water Vapour Transmission Document: Introduction to Standard GB/T 21529-2008 -- Determination of Water Vapour Transmission Rate for Plastic Film and Sheeting-----Electrolytic Detection Sensor Method
Abstract: this paper introduces the implementation progress of standard GB/T 21529-2008--Determination of Water Vapour Transmission Rate for Plastic Film and Sheeting - Electrolytic Detection Sensor Method, and compared relevant items with ISO 15106-3:2003, GB/T 1037-1988.
Keywords: water vapour transmission

*Labthink Lab and Service--------Organic Vapor Permeability Lab
Abstract: this paper introduced the necessity of aromatic vapor permeability test and its testing method, together with the function and service of organic vapor permeability lab and the organic vapor permeability tests.
Key words: aromatic vapor, barrier property, permeant amount, NON-FICK permeance, test

*Labthink Lab & Service---------Ultra-High&Low Temperature Lab
Abstract: This paper introdeced the necessity of barrier capability test for packaging material under unconventional temperature and testing method in details, and Ultra-High&Low Temperature Lab of labthink and its services.
Key Words: unconventional temperature, barrier capability, oxygen permeation amount, test

*The Application of DATA-CURVE-FITTING For Flexible Packaging Permeability Tests
Abstract: With regards to the industries of food, pharmaceutics, cosmetic, most of daily chemical and part of other industry productions, high barrier packaging materials are remarkably effective in prolonging the shelf life and improving the preservation quality of packaging contents. However, the barrier property of such materials can be changed with the influence of environment factors, particularly, in the regard of temperature. Meanwhile, because differences exist in molecule arrangement in polymer for various kinds of materials, the regularities of change in barrier property with respect to temperature fluctuation varies for different materials. Thus, we should test and analyze the temperature influence on each kind of material independently. Even though we know the regularities of some materials that barrier property links with the temperature, it is still undoable in getting the permeability parameters for one kind of material by taking the data of other similar kinds of materials at specifically temperature for reference. Furthermore, permeability tests can be easily operated at routine temperature directly (e.g.: 10~50℃), whereas it tends to be very difficult and costly to run such tests at non-routine temperature (e.g.: refrigeration temperature, high temperature for sterilization, etc.). Carrying out permeability tests at non-routine temperature needs the equipments with superexcellent temperature resistance, such as good heat resistance or cold resistance, as well as that operator needs to actualize the ideal test environment at such temperature. Mistakes can be often made in packaging materials chosen caused by taking the barrier property of materials at routine temperature into account only. At the same time, severe pecuniary loss will be followed these kinds of mistakes as well. In this way, barrier property of materials at non-routine temperature becomes very useful in the field of practical application. The DATA-CURVE-FITTING methodology could be the way out to such puzzle of matching up the best use of barrier materials with packaging at different temperature, especially the non-routine ones. Based on film permeation theory applied broad, the DATA-CURVE-FITTING methodology can be used to obtain the permeability parameters of barrier materials at non-routine temperature easily and economically by analyzing the permeability data got in tests operated at routine temperature based on such method and the model of film permeation theory without actualizing the appointed test environment of non-routine temperature costly. This DATA-CURVE-FITTING methodology for permeability test has been proven to be highly scientific and objective through observations on a large number of actual testing data.
Key Words: DATA-CURVE-FITTING, permeability, packaging materials, non-routine temperature, flexible packaging

*Overview the Relationship between Pressure Difference and Gas Penetration Property of Material Scientifically
Abstract: This paper analyzed the mistaking point of view that believed the existence of pressure difference in differential-pressure method would affect the result of gas penetration property test and demonstrated that pressure difference between two sides of specimen would not affect the gas penetration property of material (gas penetration amount and gas penetration coefficient) by plenty of testing data.
Key Words: pressure difference, differential-pressure method, compressive strength, gas penetration amount, gas penetration coefficient

*Inspect Sealing Capability of Flexible Package Bags Using LSSD
Abstract: It is applicable in the measurement of heat seal strength, the quality of heat seal, the burst pressure and the seal-leakage character of each heat seal edges of the flexible packages that are made using various kinds of heat seal technics; the measurements of leak characters for all kinds of plastic pilferproof closures; the measurements of the unitary airproof character, compression resistance strength, cap body joint strength, cap disengaging strength, seal strength of edge, butting strength of various flexible tubes; Simultaneous, it can also provide evaluating and analysing for the compression and burst resistance strength of the materials of flexible packaging bags, the torsional airproof index of cap, the cap joint and disengaging strength, the stress strength; as well as the airproof character, the compression resistance character, the burst resistance character of unitary bottle, and so on
Key Words: flexible package, heat seal, open package, closed package, leak

*Statistical Process of Results and Laboratory Proficiency Evaluation of Proficiency Testing
Abstract: This paper introduced the statistical procedure of proficiency testing, calculation method and details in laboratory proficiency evaluation of plastic packaging material barrier property testing organized by CNCA. Labthink participate in the project as cooperating institute.
Key Words:oxygen transmission rate, water vapor transmission rate, proficiency testing, data statistic, outlier

*Notice of Barrier Property Testing and Instrument Usage
Abstract: This paper presented a summary of problems arising in proficiency testing project “Barrier property test of plastic packaging material——Determination of oxygen and water vapor transmission rate”, then gives out solutions and suggestions for the development of instruments and practical experiences.
Key Words:oxygen transmission rate, water vapor transmission rate, experimental conditions, gravimetric method, permeate equilibrium

*Procedure of Proficiency Testing of Plastic Packaging Material Barrier Property Testing
Abstract: This paper introduced the implementing procedure of the proficiency testing of barrier property testing of plastic packaging material, the procedure is divided into several parts, including previous preparation of proficiency testing, specimen preparation and test, specimen distribution, testing data receiving from laboratories engaged in the project, result statistics, supplement testing and presentation of the finally result.
Key Words:barrier property, oxygen transmission rate, water vapor transmission rate, proficiency testing, statistics

*The testing method of proficiency testing sample’s homogeneity and stability
Abstract: As a Cooperation unit， Labthink participated the plastic packaging material permeability proficiency testing project which was orginzed by Certification and Accreditation Administration of P.R.C, and accomplished the test specimen’s homogeneity and stability splendidly. This paper introduced specifically for the sample choice and the significance with method of sample homogeneity, stability testing in this proficiency testing project.
Key Words:OTR, WVTR, proficiency testing, homogeneity, stability.

*Proficiency Test of Barrier Property Testing for Plastic Packaging Materials
Abstract: this article gives a systematic introduction to Proficiency test of barrier property testing for packaging material. It describes the project in terms of its background, organization institutes, institutions cooperating, participating laboratories, specimen, test method and statistical data. This proficiency test not only completes the real situation assessment of domestic barrier property testing level, it is also a large-scale system and objective data comparison between various barrier property test methods for the first time in the world. The whole process is objective and fair.
Key Words:barrier property, oxygen transmission rate, water vapor transmission rate, proficiency test, and statistic

*Enactment of the National Standard on Electrolytic Sensor Method
Abstract: this article details on the enactment background and progressing of electrolytic sensor method water vapor permeability testing standard. Based on actual demand of application in our country, it also introduces the calibration as well as the application advantages of this standard.
Keywords:water vapor permeability, electrolytic sensor method, calibration, and electrolytic cell

*Present Situation and Prospects of Gravimetric Method Water Vapor Permeability Testing
Abstract: test accuracy and test repeatability of water vapor permeability testing using gravimetric method are controversial at present. The expansibility of gravimetric method and whether gravimetric method will be replaced by new methods become the focus of concern. This article presents a systematic analysis to test principle, present situation and prospects of gravimetric method.
Keyword:GB 1037，water vapor permeability，gravimetric method，cup method

*On Water Vapor Permeability Test Methods for Plastic Films (package)
National Plastic Products Quality Supervision & Testing Center (Fuzhou) QingCheng
Abstract: water vapor permeability is of vital importance to food and medicals. Based on his work experience, the author analyzes influencing factors of water vapor permeability testing methods for plastic films (package). Meanwhile, some suggestions for improvement are put forward.
Keywords:water vapor permeability, water vapor transmission rate, cup method, sensor method, desiccant method and water method

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