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Case study
Firmeza e adesividade do arroz cozido
Exigência
A textura do arroz é vital para a perceção que o consumidor tem da qualidade do produto. A textura é um dos critérios sensoriais críticos para a aceitação.
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FAQs about trapezoidal tear testing
What materials can be tested?
Any flexible sheet material including textiles, nonwovens, films, laminates, and membranes.
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How tension testing is performed
Tensile strength testing
Tensile strength testing follows established international standards such as ISO 527 and ASTM D63
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The role of ECT in quality assurance
The Edge Crush Test is a widely used measure for predicting box stacking performance.
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What is elongation at break?
Elongation at break measures how much a material can stretch before it fractures. Expressed as a percentage of the original gauge length, it is a key indicator of ductility and toughness.
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Step-by-step needle penetration testing process
Sample preparation
Specimens are cut to the required dimensions and conditioned to the specified environmental parameters such as temperature and humidity. Thickness and surface finish are controlled for consistency.
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Step-by-step guide to conducting the ring crush test
Prepare the sample
Cut samples to the required size specified by the relevant standard, typically corresponding to a circumference of 152 mm. Condition the samples at the specified temperature and humidity.
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Calculating secant modulus
Accurate calculation requires stress-strain data, typically obtained from tensile, compressive, or
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Key puncture resistance testing methods
Different materials and applications require different puncture testing methods. The two most common categories are high-force puncture testing and slow puncture testing.
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Brushes
Brushes use synthetic or natural filaments to create bristles which are typically clamped to a handle via a ferrule.
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How the strip method works
The strip method involves cutting a specimen to a precise width, typically 50 mm or 25 mm depending on the applicable standard, and mounting it in the grips of a tensile testing
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Applications across industries
Friction testing plays a vital role in multiple sectors:
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Introduction to breaking torque tests
Breaking torque testing, also known as torque-to-failure is a critical mechanical test used to determine the point at which a component or assembly fails under rotational force.
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Introduction to tensile testing
Tensile testing is one of the most widely used methods in material science for determining the mechanical properties of materials under uniaxial tension.
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Applications across industries
Tensile strength testing is essential in product development, quality control, and certification across multiple sectors:
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Introduction to T-peel testing
T-peel testing is a specialised method for determining the adhesive bond strength between two flexible materials joined together.
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How is 180 degree peel testing performed
The test is carried out on a universal testing machine fitted with a suitable peel fixture.
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Anchorage strength testing
Definition and purpose
Anchorage strength testing evaluates how securely a component is fixed into place, whether crimped, inserted, bonde
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Grab method vs strip method
Compared with the strip method (as defined by ISO 13934-1), which grips the full width of the fabric, the grab method
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Interpreting trapezoidal tear test results
Test results typically report peak tear force in newtons, and sometimes the average force during propagation. Engineers use this data to:
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Comparing compressive and tensile modulus
While compressive modulus measures stiffness under compression, tensile modulus measures stiffness under tension.
Key differences:
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Interpreting ECT results
Factors influencing results
Flute type and size - A-flute, B-flute, C-flute, or combinations such as double-wall can affect edgewise strength.
Material quality - Fibre composition, paper grade
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Key applications of pull-off and pull-out testing
The versatility of these tests means they are used across a broad range of products and industries.
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Types of peel tests
90° peel test
This method is used for flexible-to-rigid bonds, where the flexible layer is peeled away at a right angle to the substrate. It is common for:
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Introduction to peel wheel testing
The peel wheel test is a specialised adhesion test method used to measure the strength of adhesive bonds in flexible materials such as plastics, films, and laminates.