February 29th – Taizhou Huangyan Nantong Plastic Co Ltd is a professional production and processing company manufacturing household plastic products, baby products, medical supply items and more. It has a complete and scientific quality management system within the company, in order to build the integrity, strength and product quality of the Taizhou Huangyan Nantong Plastic business, which is very much recognised and appreciated within the industry.
The company’s product range in the main includes – homeware, household and kitchen utensils and flexible storage products. Through its years of operation and development, the Taizhou Huangyan Nantong Plastic business has achieved a reputation for its product quality, cost effectiveness, impressive visual impact and also, for its highly pleasing and attractive ‘usage experience’.
Here below on its readable blog, Nantong Plastic – a new member this week of IMD online – highlights the importance of the control of temperature in the processing of certain of its products, particularly plastic bottles.
Non-flowing temperature: High temperature at which no flow occurs under a certain pressure. A certain amount of plastic is added to the barrel at the upper end of the capillary rheometer die and heated to a certain temperature. After the constant temperature is known to be 10MIN, a constant pressure of 50MPA is applied. If the material does not flow out of the die, it is difficult to increase the temperature of the material by 10 degrees after depressurising, and then apply a constant pressure of the same size after holding 10MIN.
Viscous flow state
This continues until the melt flows out of the die, and this temperature is reduced. 10 degrees is the non-flowing temperature of the material. Flowing temperature TF: refers to the temperature at which the amorphous polymer changes from a highly elastic state to a viscous flow state. It is the lower limit of the processing temperature of amorphous plastics.
Decomposition temperature TD: This refers to a polymer in a viscous flow state. When the temperature is further increased, the degradation of the molecular chain will be intensified, and the temperature reached when the polymer molecular chain is significantly degraded is the decomposition temperature. Melting temperature TM: For crystallisation – Type polymer refers to the temperature at which the three-dimensional remote ordered state of the macromolecular chain structure changes to disordered viscous fluid state, also known as the melting point. It is the lower limit of the processing temperature of the crystalline polymer.
Glass transition temperature TG: This relates to the amorphous polymer. The transition temperature from the glass state to the high elastic state or from the former to the former. It is the low temperature of the free movement of the macromolecular segment of the amorphous polymer, and it is also the upper limit of the working temperature of the product.