Table of Contents
What is seal strength?
Seal strength is the tensile strength of the seal at ambient temperature. It is the maximum force required to separate the two layers of a seal under particular conditions. Procedure: A series of seals at different sealing temperatures are made, using a machine employing hot-bar jaws.
What is heat seal strength?
The heat seal strength test is a test which validates the sealing process. By testing the sealed pouches one tests the combination of the packaging material and the heat sealing process. If the results are good, then it can be concluded that he sealing process went well too.
What affects seal strength?
From the evaluation of several factors involved and found that the 3 factors may affect the strength of seals which are sealing temperature, speed in film feeding, and degree of shut-off valves.
How do you test seal integrity?
Testing the Integrity of Package Seals
- Methods of Seal Testing. Seal integrity assessments are performed as an integral part of food safety, HACCP, production quality control, and after altering distribution methods.
- Ultrasonic seal test.
- Vacuum decay test.
- Bubble emission test.
- Dye penetration test.
- Seal strength test.
What is ISTA 2A?
ISTA 2A tests are for packaged-products 150 lb. (68 kg) or less, and are a combination of basic test elements from ISTA 1A (Non-Simulation Integrity Performance Testing) and advanced test elements from ISTA 3A (General Simulation Performance Testing).
How do you test skin strength?
Typical tests involve peeling two bonded flexible adhered from each other, or peeling a flexible bonded adhered from a rigid substrate. Peel tests are usually conducted at a constant rate at various angles, with 90° and 180° being the most common.
What is a sealing iron used for?
Monokote® sealing iron is used for heat sealing appliqué fabric down. The Top Flite® Monokote® sealing iron has a coated, non-stick ironing shoe. The small shoe promotes smooth, easy use and prevents scratching and hazing.
What is a sealing machine?
Sealing machines are used to seal containers with liquids, granules, powders, and sprays for consumer, bulk, and original equipment manufacturer (OEM) supply shipments. Packaging materials include aerosol containers, bags and pouches, blister packs, bottles and jars, as well as cartons and boxes.
What is the sealing temperature?
Seal initiation temperature is defined as the heat sealing jaw temperature at which a specific level of seal strength is obtained and may be determined by plotting the seal strength versus seal jaw temperature.
What is dwell time in sealing?
Sealing dwell time refers to the time the heating elements of a packaging process (clamps, plates, bars, etc.) are in direct contact with the substrate(s). It can be either one-sided or two-sided heating. The two materials come together to form a bond or seal.
What is sealing integrity?
Seal Integrity is the most important element to control the quality of the packaging products. If the seal integrity of the packages is not tested appropriately, certain issues arise with the products that result in potential damage to the relationship of the manufacturer with the customers.
What is sealing test?
The seal test is a paper test. The parts which are sealed together are showing a darker area than the surrounding area in order to make sure that irregularities in the seal are easy to see and the complete seal can be interpreted more easily. The seal test offers various fields for documentation.
What is the difference between sealseal strength and package integrity?
seal strength and package integrity are distinctly separate objectives of the package testing process. Seal strength is a package attribute; data acquired can be used to validate the package design as adequate for maintenance of integrity, to monitor process performance, and to confirm shelf life performance.
What is the purpose of the Seal strength?
Seal strength is a package attribute; data acquired can be used to validate the package design as adequate for maintenance of integrity, to monitor process performance, and to confirm shelf life performance. The seal strength also provides assurance of control of the “peelable” characteristic of the package.
What are the two types of Seal Strength testing?
ISO 11607 addresses two types of seal-strength testing: tensile strength testing and burst or creep testing. Pull it apart. Tensile seal-strength testing (ASTM F88) uses a defined width sample (25.4 mm or 1 in.) of the package seal perimeter.
How do you measure the strength of a tensile seal?
Pull it apart. Tensile seal-strength testing (ASTM F88) uses a defined width sample (25.4 mm or 1 in.) of the package seal perimeter. A jaw moving at a defined constant rate (10–12 in./min) pulls the seal apart while measuring resistance during seal separation.