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What is the PET preform model?

  • Categories:News
  • Time of issue:2021-05-21 11:47
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(Summary description)The chemical name of PET is polyethylene terephthalate, also known as polyester. At present, GF-PET is mostly used by customers, mainly for preforms. The rheology of PET in the molten state is better, and the pressure has a greater influence on the viscosity than the temperature. Therefore, the pressure is mainly used to change the fluidity of the melt. The use of the preform mold hot runner system avoids the production of handles, thereby saving raw materials, and at the same time eliminating the need to remove the handles by hand, manipulator or other methods in the past. The preform mold can be installed with a given size mold, provide sufficient clamping force, operate according to the requirements of the cycle time, plasticize enough materials, and so on. Preform molds are generally formed by hot runner molds. There must be a heat shield between the mold and the injection molding machine template, the thickness of which is about 12mm, and the heat shield must be able to withstand high pressure. Exhaust must be sufficient to avoid local overheating or chipping, but the depth of the exhaust port should generally not exceed 0.03mm, otherwise it is easy to produce flash. Nowadays, the shapes of plastic bottles are round, square, oval, etc. The round bottle body uses a large amount, which is characterized by a relatively uniform wall thickness, a high ability to absorb impact energy, and a low production cost, but the utilization rate of the useful area during storage or transportation is low. The square or rectangular bottle body has a high utilization rate of the useful area during storage and good stability, but it is more prone to swelling. There is no clear common rule for the standard of plastic bottles, and it is usually determined according to the needs of users and the nature of the medicine. In addition to the nominal capacity of the plastic bottle, there is also a full mouth capacity, which is larger than the nominal capacity. The specific requirements are determined by the diameter of the bottle mouth and the height of the bottle.

What is the PET preform model?

(Summary description)The chemical name of PET is polyethylene terephthalate, also known as polyester. At present, GF-PET is mostly used by customers, mainly for preforms. The rheology of PET in the molten state is better, and the pressure has a greater influence on the viscosity than the temperature. Therefore, the pressure is mainly used to change the fluidity of the melt.

The use of the preform mold hot runner system avoids the production of handles, thereby saving raw materials, and at the same time eliminating the need to remove the handles by hand, manipulator or other methods in the past. The preform mold can be installed with a given size mold, provide sufficient clamping force, operate according to the requirements of the cycle time, plasticize enough materials, and so on.

Preform molds are generally formed by hot runner molds. There must be a heat shield between the mold and the injection molding machine template, the thickness of which is about 12mm, and the heat shield must be able to withstand high pressure. Exhaust must be sufficient to avoid local overheating or chipping, but the depth of the exhaust port should generally not exceed 0.03mm, otherwise it is easy to produce flash.

Nowadays, the shapes of plastic bottles are round, square, oval, etc. The round bottle body uses a large amount, which is characterized by a relatively uniform wall thickness, a high ability to absorb impact energy, and a low production cost, but the utilization rate of the useful area during storage or transportation is low. The square or rectangular bottle body has a high utilization rate of the useful area during storage and good stability, but it is more prone to swelling. There is no clear common rule for the standard of plastic bottles, and it is usually determined according to the needs of users and the nature of the medicine. In addition to the nominal capacity of the plastic bottle, there is also a full mouth capacity, which is larger than the nominal capacity. The specific requirements are determined by the diameter of the bottle mouth and the height of the bottle.

  • Categories:News
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  • Time of issue:2021-05-21 11:47
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The chemical name of PET is polyethylene terephthalate, also known as polyester. At present, GF-PET is mostly used by customers, mainly for preforms. The rheology of PET in the molten state is better, and the pressure has a greater influence on the viscosity than the temperature. Therefore, the pressure is mainly used to change the fluidity of the melt.

The use of the preform mold hot runner system avoids the production of handles, thereby saving raw materials, and at the same time eliminating the need to remove the handles by hand, manipulator or other methods in the past. The preform mold can be installed with a given size mold, provide sufficient clamping force, operate according to the requirements of the cycle time, plasticize enough materials, and so on.

Preform molds are generally formed by hot runner molds. There must be a heat shield between the mold and the injection molding machine template, the thickness of which is about 12mm, and the heat shield must be able to withstand high pressure. Exhaust must be sufficient to avoid local overheating or chipping, but the depth of the exhaust port should generally not exceed 0.03mm, otherwise it is easy to produce flash.

Nowadays, the shapes of plastic bottles are round, square, oval, etc. The round bottle body uses a large amount, which is characterized by a relatively uniform wall thickness, a high ability to absorb impact energy, and a low production cost, but the utilization rate of the useful area during storage or transportation is low. The square or rectangular bottle body has a high utilization rate of the useful area during storage and good stability, but it is more prone to swelling. There is no clear common rule for the standard of plastic bottles, and it is usually determined according to the needs of users and the nature of the medicine. In addition to the nominal capacity of the plastic bottle, there is also a full mouth capacity, which is larger than the nominal capacity. The specific requirements are determined by the diameter of the bottle mouth and the height of the bottle.

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