Preform sterilization method and content filling method and device

A preform and sterilizing device technology, which is applied in packaging, bottling machines, liquid bottling, etc., can solve the problems of bactericide corrosion in forming machines, achieve simple filling and increase manufacturing speed

Active Publication Date: 2017-04-12
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a problem that when the preform is blow-molded after sterilization, each part of the molding machine is easily corroded by the residual sterilant

Method used

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  • Preform sterilization method and content filling method and device
  • Preform sterilization method and content filling method and device
  • Preform sterilization method and content filling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] Such as figure 1 As shown, the preform 1 is sterilized by spraying water on the inner and outer surfaces of the preform as a whole including the mouth portion 1a of the preform 1 with superheated steam S whose pressure is higher than the atmospheric pressure of 200°C to 500°C.

[0047] The temperature of the superheated steam sprayed on the preform is preferably 200°C to 500°C, more preferably 250°C to 400°C. In the temperature range of 200° C. to 500° C., by exposing only the surface of the preform to high temperature, bacteria adhering to the surface of the preform can be sterilized in a short time. If the temperature of the superheated steam S is lower than 200° C., spraying for a long time is required for sterilization, PET itself constituting the preform becomes high temperature, and the deformation of the preform increases. Moreover, if it exceeds 500 degreeC, even in a short time, the temperature of PET itself which comprises a preform rises, and it becomes easy...

Embodiment 1

[0115] The superheated steam with a flow rate of 0.7g / s generated by heating water with a superheated steam generator according to the medium heating method is blown from a nozzle with an inner diameter of 8mmφ, and the preform for a 500mL (milliliter) PET bottle and a 2LPET bottle are injected at a temperature of 300°C. Each inner surface of the preform was sprayed for 5 seconds.

[0116]The bactericidal effect of the spraying of superheated steam was confirmed on the basis of the index bacteria planted on the inner surface. As shown in Table 1, it was found that the bactericidal effect is suitable for filling with mineral water and the like.

[0117] [Table 1]

[0118] B.sub. A. nig. For 500mL 3.1D 6.0D or above For 2L 3.0D 6.0D or above

[0119] In addition, in Table 1, "B.sub." is the abbreviation of Bacillus subtilis (Bacillus subtilis), and "A.nig." is the abbreviation of Aspergillus niger (Aspergillus niger). "D" is a D value indicati...

Embodiment 2

[0124] The inner surface of the preform for a 500mL PET bottle is sprayed from a nozzle with an inner diameter of 8mmφ at various blowing temperatures ranging from 180°C to 550°C for various times ranging from 10 seconds to 3 seconds. Generation of superheated steam by means of medium heating The device heats water to generate superheated steam with a flow rate of 0.7g / s.

[0125] Table 3 shows the bactericidal effect and the deformation of the inner diameter of the preform by the spraying of the superheated steam.

[0126] [table 3]

[0127] Ejection temperature (°C) Ejection time (seconds) Bactericidal effect out of shape 180 10 × × 250 6 ○ ○ 350 4 ○ ○ 450 3 ○ ○ 550 3 ○ ×

[0128] However, in Table 3, regarding the bactericidal effect, the D value relative to Bacillus subtilis is 3 or more, and the D value relative to Aspergillus niger is 6 or more. Set to "×" (impossible). Regarding the deformation, the case where th...

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Abstract

The invention provides a method for sterilizing a preform, which can sterilize the preform simply and rapidly. Spraying superheated steam (S) made of water on the entire inner and outer surfaces including the mouth portion (1a) of the preform (1) with a pressure higher than the atmospheric pressure of 200° C. to 500° C. (1) Bacteria on the inner and outer surfaces are sterilized.

Description

technical field [0001] The present invention relates to a method for sterilizing preforms used for making containers such as bottles, and a method and device for filling beverages and the like. Background technique [0002] Conventionally, it has been proposed to carry out PET (polyethylene terephthalate) preforms while spraying a bactericide gas such as hydrogen peroxide on the preforms to sterilize them, and to use a blow molding machine to sterilize the preforms. An aseptic filling method is an in-line system in which a preform is formed into a bottle, the bottle is filled with a beverage, and capped to form an aseptic package (see, for example, Patent Document 1). [0003] In addition, it is also proposed to attach the evaporated sterilant to the preform and discharge the remaining sterilant by using the flame of the burner (for example, refer to Patent Document 2.) or to spray the vapor of the bactericide on the preform, and then A method in which a preform is heated a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65B55/06B29C49/42B65B55/04B29L22/00
CPCB65B55/10B65B3/022B67C7/0073B67C2003/227B29L2031/7158B29C49/06B29C49/4252B29C2049/024B65B55/06B29C49/42414B29C49/42418B29C49/42802B29C49/42808B29C2949/0715A61L2/07
Inventor 宫原美启土屋博隆西田吉男
Owner DAI NIPPON PRINTING CO LTD
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