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Polyester bottle with resistance to heat and pressure and process for producing the same

A production method, heat-resistant technology, applied to bottles, rigid containers, and other household appliances, etc., can solve the problems of reducing thickness and reducing weight, and achieve the effect of improving pressure resistance

Inactive Publication Date: 2010-08-18
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, attempts have been made to increase the thickness of the bottom more than conventional pressure-resistant bottles so as to impart heat resistance thereto on a limited area, however, this is still insufficient so that it is difficult to obtain the effects of weight reduction and thickness reduction

Method used

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  • Polyester bottle with resistance to heat and pressure and process for producing the same
  • Polyester bottle with resistance to heat and pressure and process for producing the same
  • Polyester bottle with resistance to heat and pressure and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Homopolyethylene terephthalate (intrinsic viscosity, 0.78 dL / g) used as a raw material was molded into a preform weighing 33 g and having a mouth satisfying the shape of a screw cap by using an injection molding machine.

[0100] The preform was heated at 110°C and primary blow molded at a mold temperature of 25°C for the neck and 120°C for the body to obtain a primary molded product having a diameter of 72 mm in its body.

[0101] The secondary molded product is obtained by heating the primary molded product so that the body temperature of the primary molded product is 170°C and heat-shrinks, and the secondary molded product is immediately subjected to secondary blow molding at a metal mold temperature of 25°C . A bottle molded into a final molded product having a bottle height excluding the mouth of 210 mm, a neck length of 44 mm, a body diameter of 65 mm, a filling capacity of 530 ml, a body thickness of 0.3 mm, and a position 15 mm from the center of the bottom towa...

Embodiment 2

[0103] A bottle of the same shape was molded in the same manner as in Example 1 except that the diameter of the body of the primary molded product was set to 76 mm. The amount of processing is 19%.

Embodiment 3

[0105] A bottle of the same shape was molded in the same manner as in Example 1 except that a copolymerized polyethylene terephthalate (intrinsic viscosity, 0.80 dL / g) containing an isophthalic acid component of 1.3 mol% was used as inner and outer layers, and using 5% by weight of an oxygen-absorbing resin containing a polyamide resin as a base material as an intermediate layer, a multilayer preform was molded by using a co-injection molding machine. The amount of processing is 23%.

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Abstract

A process for producing a heat- and pressure-resistant polyester bottle which comprises a primary blow molding step in which a preform of a polyester resin is subjected to biaxial stretching blow molding to obtain a primary molding, a heat treatment step in which the primary molding is heat-treated and thermally shrunk to obtain a secondary molding, and a secondary blow molding step in which the secondary molding is subjected to biaxial stretching blow molding to obtain a final molding. In the primary blow molding step, biaxial stretching is conducted so that the neck part of the primary molding has almost the same size as the neck part of the final molding. Furthermore, the heat treatment step is conducted so that the neck part of the secondary molding has undergone no thermal shrinking.Thus, a heat- and pressure-resistant polyester bottle can be provided in which the length of the neck part is in the range of 10-40% of the bottle height, the neck part has a crystallinity of 20-35%,and the barrel part has a crystallinity of 35-50%. It has a slender neck, i.e., it is a long-necked bottle, and is suitable for use as a beer container. This bottle made of a polyester resin does notimpair the impression given by conventional glass-bottled beers.

Description

technical field [0001] The present invention relates to heat and pressure resistant polyester bottle and its production method. More particularly, the present invention relates to a so-called crane neck-shaped thermocompression-resistant polyester bottle having a greater ratio of the neck to the overall height of the bottle than conventional polyester bottles, and a method for producing the same . Background technique [0002] Biaxially stretched blow-molded containers of thermoplastic resins such as polyethylene terephthalate (PET) have excellent transparency, surface gloss and impact resistance, rigidity and gas barrier properties required for bottles, and have been widely used to contain Bottles for various liquids. [0003] Generally, in the production of bottled products, the contents are hot-filled, or the contents are filled and thereafter heat-sterilized or pasteurized to improve the preservability of the contents. However, polyester bottles have the disadvantage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/18B29C49/64B65D1/00B65D1/02B29K67/00B29L22/00B32B1/00
CPCB29B2911/1498B29L2031/7158B29B2911/1414B29K2023/12B29B2911/14106B29B2911/1402B29B2911/14066B29K2067/00B29B11/12B29C2035/0822B29C49/649B65D1/0284B29B2911/1422B29B11/08B29B2911/14053B29B2911/14093B29B2911/14213B29B2911/14133B29B2911/1408B29B2911/1404B29K2023/06B29B2911/14113B29B2911/14033B29B2911/14026B29B11/14B29K2077/00B29C2949/3016B29C2949/302B29C2949/26B29C2949/28B29C2949/3008B29C2949/24B29C2949/22B29C2949/3012B29C2949/3024B29C2949/3026B29C2949/3032B29C2949/3034B29C2949/3058B29C2949/3056B29C2949/0872B29C49/6472B29C49/642B29C49/071B29C2949/0715B29C2049/7831B29C2049/7862B29C2049/78645B29C49/087B29C2049/7879B29C49/18B29C49/64B29C49/08B65D1/00Y10T428/1352Y10T428/1303Y10T428/139Y10T428/1359Y10T428/13
Inventor 小宫温佐藤友纪冈部高规大久保隆弘
Owner TOYO SEIKAN KAISHA LTD
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