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Method for hot-filling a thin-walled container

A hot filling, container technology, applied in the direction of liquid filling, thin material handling, packaging item type, etc., can solve problems such as heavy weight

Active Publication Date: 2008-07-02
PLASTIPAK PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0051] Additionally, the bottles are of greater weight with essentially the same shape in relation to stress resistance with only minor differences between commercialized products

Method used

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  • Method for hot-filling a thin-walled container
  • Method for hot-filling a thin-walled container

Examples

Experimental program
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Effect test

Embodiment Construction

[0061] The examples given relate to bottles made of PET material, but can be applied to containers made of polymeric material all of the same nature and exhibiting similar characteristics.

[0062] The method involves hot filling a thin-walled container having the characteristics described below.

[0063] The container is cylindrical and may have grooves to strengthen the bottle body. It may have a thin bottom, such as containing still mineral water, and may also have a reinforced bottom. The total weight of the container is basically the same as that of the container used to hold mineral water. Quite equal in volume.

[0064] Reinforced bottoms generally consist of a bottom raised towards the neck of the bottle with stiffeners to avoid tipping over under light pressure.

[0065] The container can be manufactured using either of two processing methods known as "HR", single or double, depending on the temperature of the package.

[0066] Thus, the container is resistant to hi...

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PUM

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Abstract

The invention concerns a method for hot-filling a container with a sterilized liquid, generally at a temperature ranging between 60 and 95 DEG C, characterized in that it includes the following steps: a) providing a container made of a material and in accordance with a process adapted to make it resistant to hot-filling with said liquid, said container having residual stresses resulting from its manufacture; b) filling said container with said hot liquid; c) closing said filled container immediately after it has been filled; d) allowing it to cool at least below a congealing temperature of the container, causing the container to be deformed by formation of a depression therein; and e) heating the container to bring about relaxation of the residual stresses, said relaxation leading to a reduction and subsequently generating an internal pressurization of the container which compensates at least the deformations caused by the effects of the depression of step d).

Description

technical field [0001] The invention relates to a method for hot filling containers with thin walls, especially made of polyethylene material. Background technique [0002] It is known to use a polymeric material, polyethylene terephthalate, PET, to manufacture containers for containing liquids. The main advantages of this material are: transparency, light weight, freedom of shape made to meet the special contours required by the product or commercial needs, in contrast to metal containers, which only have fixed shapes and fixed dimensions. Carton containers also have shape restrictions. [0003] The material's unbreakability, mechanical properties for preservation, and impermeability make it attractive and largely explain its widespread use. [0004] These bottles made of PET materials are mostly used for non-vapor liquids, such as oil and mineral water. In this case, the container is only subjected to little mechanical stress. PET is a perfectly suitable material. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B67C7/00B67C3/14B65B3/02
CPCB65B55/14Y10T428/1352Y10T428/31786B67C2003/226
Inventor 让-特里斯坦·乌特曼
Owner PLASTIPAK PACKAGING
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