The principle of volatile corrosion inhibition is by using VCI, volatile corrosion inhibitor which can be evaporated under normal temperature so as to achieve saturation in the closed environment; VCI molecules are absorbed onto the metal surface to form a transparent protection film of several molecules thick after complicated physical and chemical reactions. This transparent protection layer is water proof, difficult to be dissolved and thus, can stop further corrosion. Evaporated VCI molecules can reach anywhere in the package with best anti-rust performance. VCI plastic material is manufactured by polyolefin resin with VCI under processes.

Volatile corrosion inhibiting film testing should adopt US military specification MII.PRF-22019D “Barrier Materials, Transparent, Flexible, Sealable, Volatile Corrosion Inhibitor Treated” and other domestic and international standards.

1.VCI Thickness Testing

Whether the thickness of VCI plastic film is even or not is the basic for VCI film and its performances. Uneven thickness would affect the tensile strength, permeation of different parts of the package; and would affect the following processing. Thickness testing methods are varied. For VCI plastic film thickness measurement, ISO 4593 and GB/T 6672-2001 are applicable.

Labthink PARAM CHY-C2 and CHY-CA Thickness Testers are both high precision thickness testers for VCI plastic film thickness testing with the resolution upto 0.1um. Labthink PARAM CHY-CA Thickness Tester, besides its high precision, high efficiency and other characteristics and functions to similar PARAM CHY-C2, is equipped with automatic feeding system to satisfy the constant and effective testing requirements of the clients with greater testing efficiency.

2. VCI Plastic Film Impact Testing Instruments

VCI (Volatile Corrosion Inhibition) plastic film impact property and its control could avoid package breakage owing to the insufficient toughness, so as to effectively get rid of product rustiness caused by inferior impact or shock resistance of the VCI plastic packages during circulation.

VCI plastic film impact testing is in compliance with ASTM D3420, GB/T 8809-1958 and other international standards. Labthink PARAM FIT-01 Film Impact Tester is in strict compliance with these standards and with more advanced functions. For example, Labthink PARAM FIT-01 Film Impact Tester is of pneumatic specimen clamping and pneumatic pendulum releasing, which is completely different from other products that are manual clamping. Pneumatic clamping is rapid and effective with even clamping force on the four sides of the film, and will not slide during impact with inaccurate results. Besides, the precision of PARAM FIT-01 Film Impact Tester is up to 0.001J, whereas other impact testers are mostly of mechanical type with low precision through reading the graduation on the board.

3. VCI Plastic Film Tear Resistance Testing

The VCI (Volatile Corrosion Inhibition) packaging material may be torn by exterior forces during storage and transportation. Sufficient tear resistance can reduce the transmission of tear and avoid rusting caused by leakage. The testing for tear performances of VCI packaging material is of Elmendorf method; and Labthink PARAM SLY-S1 Tearing Tester can be applied for this test. This tester is computer control, display and horizontal adjustment that guarantees reliable and accurate testing results; the unique ‘3-ring’analysis technology can help the operators with more direct analysis and evaluation.

4. VCI Seal Performance Testing

VCI (Volatile Corrosion Inhibition) packages, owing to strict requirements, its seal performance testing is quite important. Seal performance is defined as the characteristic of avoiding alien substance entering into or contents coming out of the package. Usual testing methods are as follows:

4.1 Underwater Decompression Method:

Labthink PARAM MFY-01 Leak Tester is on underwater decompression method according to GB/T 15171-94 Test Method for Leaks in Sealed Flexible Packages. Put a certain amount of distilled water into the vacuum chamber, and put the sealed vacuum container into the distilled water completely. Then, set the testing pressure and testing time. Usually, the vacuum degrees are 20, 30, 50 and 90 kPa, etc. Start testing. When the leak tester has reached a certain vacuum degree, stop vacuumizing and observe. The inner-out pressure difference of the specimen will cause inferior quality specimen leak so as to test leakage.

4.2 Pressured Testing Method

Labthink PARAM LSSD-01 Leak and Seal Strength Detector is of pressured testing method. Imposing high pressure gas into the vacuum container and test the pressure resistance, sealing degree and leak indexes so as to test integration and seal performance of the vacuum container.

Labthink, the excellent provider of testing instruments and testing services, is devoted to provide most excellent and complete quality control solutions for pharmaceutical, foodstuff, cosmetics, packaging, printing, adhesive, automotive, petrochemistry, environment, biology, new energy, construction, aviation and electronic industries worldwide.

5. Barrier property testing

Barrier property is defined as the barrier performance of packaging material against liquid or gas permeable substances. The entry of oxygen would greatly increase the possibility of oxidization of metal contents, and the water vapor barrier property is of even more importance.

For gas barrier property, Labthink introduces PERME VAC series Gas Permeability Testers and Labthink PERME OX2/230 Oxygen Transmission Rate Test System that comply with relevant ASTM, ISO or GB standards (such as GB 1038 and GB 1037). For water vapor barrier property testing, Labthink PERME TSY-T series Water Vapor Permeability Testers and Labthink PERME W3/330 Water Vapor Transmission Rate Test System are applicable.

Further details please feel free to contact Shirley via:
TEL: 0086-531-85061080
FAX: 0086-531-85062108
EMAIL: trade2@labthink.cn
SKYPE: shirley-labthink
MSN: shirleywu_labthink@hotmail.com

More about Labthink(http://www.labthink.cn/en):
Labthink focusing on the laboratory testing instruments R&D and production and laboratory IT services, is dedicated to provide professional quality control solutions for customers in packaging, food, pharmaceutical, medical, daily chemistry, printing, adhesive, automotive, petrochemistry, bioscience, construction, new energy and other industries.

Customers worldwide(parts):

Labthink, think for you only!

Gas Permeation Tester conforms to ASTM D 1434, ISO 2556, ISO 15105-1, JIS K 7126-A

Features:

1. Manometric testing method; Computer control, full automatic testing;

2. Diffusion coefficient, solubility coefficient and permeability coefficient measurement.

Measure range can be extended by software.

3. Data curvefitting function at any temperatures;

4. Can be extended to cover the tests for poisonous and explosive gases;

5. Rapid calibration with reference film;

Technical data:

Test Range: 0.1~100,000 cm³/m²/24h/0.1MPa (Routine)

Upper limit is no less than 600,000 cm³/m²/24h/0.1MPa (Extension volume)

Note: Different mode volume are selected by software.

Temperature Control Range: room temperature ~ 50°C

Temperature accuracy: ±0.1℃

Vacuum Resolution: 0.1Pa

Vacuum Degree of testing chamber: <20Pa

Test Gas: O₂, N₂ and CO₂, etc. (Users provide gas sources themselves)

Test Pressure: -0.1MPa~+0.1MPa

For more information, please feel free to leave us message.

Related products:

PERME^TM VAC-VBS Gas Permeation Instrument

PERME^TM VAC-V3 Gas Transmission Rate Instrument

PERME^TM VAC-V2 Gas Permeability Tester

PERME^TM W3/330 Water Vapor Permeation Test System

PERME^TM OX2/230 Oxygen Permeation Test System

More about Labthink:

Labthink provides excellent testing equipments and services for Labs, quality and safety control of polymer materials, such as flexible packaging, pharmaceuticals, foodstuff, cosmetics packaging, printing, adhesive, automotive, petroleum chemistry, environment, biology, new energy, construction, astronautics and electronics.

1.  IV Bag Barrier Test requirement
Although New IV bag has many prominent advantages over traditional glass package, it also have disadvantages, such as barrier property, heat stability and transparency, among which barrier property is the most important one.

• Oxygen is the main factor which causes the deterioration of intravenous fluids. If the oxygen barrier property of intravenoous bag cannot perform well, it might cause the medicine to deteriorate before the guarantee date and the effect is unimaginable. As a result, antioxidant, metal-chelator and inert gases are often employed in order to reduce the oxygen in the packages, postpone and prevent the liquid from oxygenation.
• Nitrogen is stable and often used with little carbon-dioxide as ‘inert gases’ to replace the air inside bags. If the barrier property against nitrogen is not strong enough, the nitrogen would permeate through bags. It might reduce the protection effect of inert gases and increase the oxygen in the package.
• Vapor permeation affects the concentration of medicines especially solute liquid for injection. Such situation will increase the difficulty of medicine concentration and vital risks. As the good barrier property of glass is well known, it can be considered that gases and vapor cannot permeate through glasses. Soft plastic does not have such barrier property thus it is necessary to test the barrier property of IV bag.

2. The Influence of Nitrogen Permeation Rate Test
Nitrogen transmission rate test through IV bag film has always been noticeable. How to test the IV bag ?

• Currently only manometric principle instrument can test the permeation property of many gases (H2、N2、Air、O2、CO2 and so on).If the user can put the gas source under control and deal with the end gas (sometimes flammable, explosive or toxic), the instrument could be used to test the permeation property of some special gases (pay special attention to safety issue).

3.  The Development of Test Technology

• Generally speaking, IV bag film gas permeation test needs manometric principlel instrument now. But if it is the oxygen permeation rate test of IV bags, it needs equal pressure principle instruments. Two investments to two instruments, it raised the maintenance fee and investment of equipments as well as lower the utilization of all equipments. PERME-DM2/330, double method gas permeation rate test instrument has been introduced by Labthink Instruments Co.,Ltd. It is able to conduct differential pressure and equal pressure tests.

• Furthermore it can test the oxygen permeation rate of IV bags and bottles. It is a better test equipment choice to medical packaging industry and IV bag manufacturers. It can optimize the equipment cost, data accuracy and equipment utilization.

The application of multi-chamber IV bags is the great development of IV bags. Labthink is willing to have more communication and cooperation will pharmaceutical companies and institutions.

Labthink Instruments Co., Ltd.
No. 144 Wuyingshan Road, Jinan 250031, China

Shirley Wu

trade2@labthink.cn
Tel: 0086 531 85811021