Packaging Materials Testing & Quality evaluation

Done By Supriya V Singh

PACKAGING :-

Packaging is anything that is used to contain, protect, deliver or present goods. Goods could be anything.

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PACKAGING LEVELS :-

Packaging materials1. Plastic2. Paper board3. Metal4. Glass5. Wood6. Paper

Plastics can be divided into two major categories

Plastics

Thermoset plastics- Once cooled and hardened, these plastics retain their shapes and cannot return to their original form. They are hard and durable. Thermosets can be used for auto parts etc Examples : Polyurethanes, polyesters, epoxy resins  and phenolic resins.

Thermoplastics: Less rigid than thermosets, thermoplastics can soften upon heating and return to their original form. They are easily molded and extruded into films, fibers and packaging. Examples :Polyethylene (PE), Polypropylene (PP) and polyvinyl chloride (PVC).

Common plastics used in packaging

Resistance to bending is measured by repeatedly folding the film backwards and forwards at a givenrate.

Paper and Paperboard

Technical properties of paper and paper boardGrammage

Cobb Value

Moisture Content

Gloss

Brightness

Opacity

Bursting Strength

Thickness

Scuff proofness

Blow Moulding

Determines not only the deviation of the whole body from the vertical, but also the combined effect of various deformations which may also be present.

Many a times, people get confused between “Compression Strength” and “Stacking Load”. Compression Strength (CS) is derived from Stacking Load (SL). Stacking Load is the amount of physical load that a carton is expected to take during any point of its life-cycle. Firstly check if the stack height of the warehouse is the same as the transportation.

The below sketch shows the calculation of a stack height of 10 cartons where each carton weighs 20 kg. 20 kg 20 kg 20 kg 20 kg 20 kg 10 carton stack 20 kg 20 kg 20 kg 20 kg 20 kg

How do specify or calculate the desired CS of a carton.

Compression Strength = Stack Load x Safety factor (2 to 5)

Hence,