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Method for fabricating fire resistant bottle made from polyester and product

A technology of high-temperature-resistant polyester and its manufacturing method, which is applied in the field of plastic molding processing methods and its products, can solve the problem of precipitation and adhesion of low-molecular substances and decomposition products, high heat resistance of the bottle can only reach 96°C, and the heat of the bottle Difficult to be taken away and other problems, to achieve the effect of good crystallization, low mold temperature, and fast cooling speed

Inactive Publication Date: 2006-11-29
袁金火 +4
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This method has such defects: using a mold higher than 130°C will cause some low-molecular substances and decomposition products to precipitate and adhere to the mold, and the mold needs to be cleaned frequently. When the mold temperature reaches 150-160°C, every 2- The mold needs to be cleaned once every 3 hours
A higher mold temperature will make it difficult to take away the heat of the bottle, and it is difficult to avoid the deformation of the bottle after the mold is opened, so the maximum mold temperature is generally only about 160°C, and the heat resistance of the blown bottle is generally only up to 96°C

Method used

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Embodiment Construction

[0019] The table listed behind is the process parameter of the embodiment of applying the method of the present invention to blow the polyester bottle and the corresponding physical and chemical parameters of the polyester bottle.

[0020] In the embodiment, the blowing method can be summarized as follows: injection molding preform—bottom thermal crystallization treatment—infrared heating preform—bidirectional stretching preform (pre-blowing)—blowing hot air thermal crystallization bottle—air cooling—mold opening, and the process is completed One blow cycle.

[0021] Before biaxially stretching the preform, thermal crystallization is carried out on the part about 4mm below the mouth of the bottle and the stress ring.

[0022] The mold was kept at around 85°C. During processing, the mold may absorb heat and heat up, so it needs to be cooled properly.

[0023] Pre-blowing the pre-form softened by infrared heating: Put the pre-form into the mold, stretch the pre-form longitudin...

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Abstract

A process for preparing the refractory polyester bottle includes making a raw bottle, heating, putting it in mould, bidirectional drawing, blowing hot air at 160-240 deg.C in the cavity of bottle for 0.5-5 seconds, blowing cold air lower than 100 deg.C to cool it to 100 deg.C, and demoulding. Its advantages are high refractory performance (115 deg.C) and high productivity.

Description

technical field [0001] The invention relates to a plastic molding processing method and its products, in particular to a manufacturing method of a biaxially stretched polyester bottle and its products. Background technique [0002] The polyester bottle used for blowing and hot filling by biaxial stretching method is made of PET, PEN or its blend, and is injected into a preform by an injection molding machine. Plastic, and then keep the blow molded bottle in a heated mold for thermal crystallization. [0003] In the existing method, the thermal crystallization of the bottle is to heat the mold to 130-160° C., and the bottle is close to the mold to raise the temperature to obtain a certain degree of crystallinity. This method has such defects: using a mold higher than 130°C will cause some low-molecular substances and decomposition products to precipitate and adhere to the mold, and the mold needs to be cleaned frequently. When the mold temperature reaches 150-160°C, every 2-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/64B29C49/66
CPCB29C49/66B29C49/64B29C49/6605B29C2049/7831B29C2049/7832B29C2049/78645B29C2049/7866
Inventor 袁金火黄海咏陈景湖唐卫民林平岗黄胜兴
Owner 袁金火
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