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To pack fruit base drinks without or with minimum preservatives. |
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Natural flavor preserved. |
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No sodium salts. |
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Transparent family size packing. |
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Easy and convenient means to dispense content as per need. |
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Unbreakable. |
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Recyclable. |
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Advantages over
Tetra Pak |
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Content is visible, gives customer the feel of the product. |
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User can see the quantity left out in the container after use. |
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Environment friendly, easily recyclable. |
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Higher top load strength so more products can be stacked and stored in smaller space & also transported without damage. |
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What is Hot, for a Hot fill |
| :: Hot fill temperature (82 deg C) |
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-High acid fruit drinks (< 4.5 pH) |
| :: Hot fill temperature (92 deg C) |
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-Low acid fruit drinks (> 4.5 pH > 6.0) |
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-Ex. Tomato juice, low acid tea (green tea) |
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PET bottles
Hotfill & Aseptic (USA) |
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Indian Scenario |
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Launched by Maa fruits, Dharmapuri & Fruitnik at Chennai in end 2003.
-28 mm Thick neck bottles, with higher Tg resins.
-Neck crystallized bottles.
-500 / 1000 ml bottles |
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Pepsi launched its hot fill with Slice in 2004.
-Neck crystallized bottles.
-28 mm Alcoa neck.
-500ml bottle. |
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Coke followed with Maaza in the same year.
-Neck crystallized bottles.
-28 mm Alcoa neck.
-500ml bottle |
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Hot fill
Packaging : 7 Key Aspects |
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1.Perform |
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High wall thickness to yield thicker bottle.
:: Optimum design for strain hardening & crystallinity.
:: Too much stretching can lead to residual stresses at final bottle, leading to higher shrinkage.
:: Crystallized neck to withstand temperature during filling.
:: Wide / thick neck to avoid contact of hot liquid & deformation. |
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2.Bottle design |
:: Panels to absorb and dissipate vacuum created in bottle during cooling of content.
:: Base ribs to withstand temperature and liquid filling force.
:: Rigid circular ribs withstand deforming forces.
:: Higher post mold shrinkage allowance in mold design.
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3.Bottle Performance |
:: Less than 1% thermal shrinkage on hot filling conditions.
:: Base clearance to be maintained.
:: No unequal deformation in base leading to tilting / rocking of bottles.
:: No warping at neck seal surface.
:: No leakage at seal surface. |
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4.Conditioning |
:: Tilt bottle to wet & warm the closure immediately after capping.
:: Water shower the bottle to lower temperature, before putting on shrink sleeve label.
:: Water quality in shower to be clean, in order to avoid mold growth between the bottle & shrink film / pilfer proof ring. |
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5.Closures |
:: Closure material to take care of content temperature at filling.
:: Single piece closure to avoid the effect of warping of wad.
:: Sealing surfaces to take care of the expansion & shrinkage during filling and cooling. |
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6.Blowing process |
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:: Higher perform temperature for blowing.
:: Hot blow mold surfaces to increase the bottle wall crystallinity through thermal crystallization.
:: Reduce the orientation stresses in the bottle wall.
:: Internal cooling of bottle by stretch rod, to harden inner wall before ejection.
:: Quick opening of mold cavities to avoid softening of bottle wall after cooling. |
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7.Filling process |
:: Fill close to brimful in crystallized neck finish.
:: Fill up to NSR (Neck Support Ring) in non-crystallized neck finish.
:: Contact of high temperature filling head with the Non-crystallized neck finish avoided.
:: Quick capping, to avoid product contact with ambient air & cooling.
:: Caps to be sterilized before capping |
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New development |
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Panel-less Hot fill bottle |
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