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Method for filling shrink packaging

A container and hot filling technology, applied in liquid filling, using back pressure filling, packaging, etc., can solve the problems of increasing container cost, bottle wall deformation, and bottle productivity reduction

Inactive Publication Date: 2010-02-17
AISAPACK HLDG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, bottles that are heat treated to allow filling of liquid at high temperatures have a number of drawbacks
[0006] The first drawback is that only specific grades of polyethylene terephthalate can be used
These grades are more difficult to manufacture and increase the cost of the container
[0007] The second drawback is that the bottle production rate is reduced due to the heat-setting method slowing down the blow molding cycle,
[0008] A third drawback is that, due to the weight of these bottles, when filling them with hot liquid, after cooling, a negative pressure is created inside the bottle which can randomly deform the walls of the bottle
This method makes it possible to obtain regular bottles filled at high temperatures, however the complexity of the filling machine, which fills each bottle in a cavity, makes this difficult to use

Method used

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  • Method for filling shrink packaging
  • Method for filling shrink packaging
  • Method for filling shrink packaging

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0080] The weight of the bottle is 24 grams and its base is petal-shaped. Its initial volume is 543.2 ml. After filling at 90°C using the following procedure, its volume became 508.7 ml. The bottle thus shrinks by 6.35% during filling. After cooling, the relative pressure inside the bottle is slightly positive.

[0081] Fill the bottle using the following how-to:

[0082] 1. Provide empty bottles

[0083] 2. Rinse the bottle

[0084] 3. Conveying the bottles to the supply station

[0085] 4. Start cooling the outer wall of the bottle by spraying water at 15°C

[0086] a. Fill the bottle with 90°C water

[0087] i. Filling time: 4 seconds

[0088] ii. Fill volume: 92% of the initial volume, which is 499.7 ml

[0089] b. Conveying the bottles to the sealing station

[0090] i. Duration: 1 second

[0091] c. Airtight bottle

[0092] i. Duration of stopper: 1 second

[0093] 5. End the cooling of the outer wall of the bottle

[0094] 6. Shrinkage of bottles in the op...

example 2

[0101] The bottle weighs 37.4 grams and has a petal-shaped base. Its initial volume is 1064.2 ml. After filling at 88°C using the following procedure, its volume became 1012.1 ml. The bottle therefore shrank by 4.9% during filling. After cooling, the relative pressure inside the bottle is slightly positive.

[0102] Fill the bottle using the following how-to:

[0103] 1. Provide empty bottles

[0104] 2. Rinse the bottle

[0105] 3. Conveying the bottles to the supply station

[0106] 4. Start cooling the outer wall of the bottle by spraying water at 15°C

[0107] a. Fill the bottle with water at 88°C

[0108] i. Filling time: 8 seconds

[0109] ii. Filling volume: 92% of the initial volume, ie 979.1 ml

[0110] b. Conveying the bottles to the sealing station

[0111] i. Duration: 1 second

[0112] c. Airtight bottle

[0113] i. Duration of stopper: 1 second

[0114] 5. End the cooling of the outer wall of the bottle

[0115] 6. Shrinkage of bottles in the open a...

example 3

[0122] The weight of the bottle is 24 grams and its base is petal-shaped. Its initial volume is 543.2 ml. After filling at 95°C using the following procedure, its volume became 489.5 ml. So the bottle shrinks by 9.89% during filling. After cooling, the relative pressure inside the bottle is slightly positive.

[0123] Fill the bottle using the following how-to:

[0124] 1. Provide empty bottles

[0125] 2. Rinse the bottle

[0126] 3. Conveying the bottles to the supply station

[0127] 4. Start cooling the outer wall of the bottle by spraying water at 5°C

[0128] a. Fill the bottle with water at 95°C

[0129] i. Filling time: 4 seconds

[0130] ii. Fill volume: 92% of the initial volume, which is 499.7 ml

[0131] b. Conveying the bottles to the sealing station

[0132] i. Duration: 1 second

[0133] c. Airtight bottle

[0134] i. Duration of stopper: 1 second

[0135] 5. End the cooling of the outer wall of the bottle

[0136] 6. Shrinkage of bottles in the op...

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Abstract

The invention relates to a method for packaging a liquid in a plastic container (1) having a strong molecular orientation. The inventive method comprises the following steps: the container (1) is filled with a liquid at high temperature; the walls (5) of the container (1) are cooled during the filling step; the container (1) is sealed; the walls (5) of the container (1) are cooled during the sealing step; the container (1) undergoes passive retraction following the sealing step; and the walls (5) of the container (1) are cooled following the retraction step. The invention also relates to a device for implementing said method and to the resulting container.

Description

technical field [0001] The present invention relates to a method of filling a collapsible container with a liquid product. The invention describes the filling of a product into a plastic container at an elevated temperature, which shrinks at said elevated temperature. The method is particularly applicable to filling PET bottles containing products above 60°C without heat setting. Background technique [0002] Polyethylene terephthalate (PET) bottles are used in many fields due to their excellent light resistance, transparency, and sensory properties. The bottles are manufactured at high production rates by stretching the preforms in two axes in the mold. [0003] However, although such bottles have many advantages, they have the disadvantage of being deformed when their temperature exceeds 60°C. Filling the bottle with product at high temperature (85° C.) causes this deformation, rendering the bottle unsuitable for use. The prior art has described several methods for rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B67C3/14B67C3/04B67C7/00
CPCB67C3/045B67C3/14B67C7/0073
Inventor J·托马塞
Owner AISAPACK HLDG SA
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