The crocheting garden hose manufacturer will take you to understand: 7 parameters of the thermal performance of engineering plastics

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-10-16
  • Views:0

(Summary description)Many people are not very familiar with the thermal performance parameters of engineering plastics. The following crocheting garden hose manufacturers will take you to learn more about it.

The crocheting garden hose manufacturer will take you to understand: 7 parameters of the thermal performance of engineering plastics

(Summary description)Many people are not very familiar with the thermal performance parameters of engineering plastics. The following crocheting garden hose manufacturers will take you to learn more about it.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-10-16
  • Views:0
Information

Many people are not very familiar with the thermal performance parameters of engineering plastics. The following crocheting garden hose manufacturers will take you to learn more about it.

china Crocheting Garden Hose Wholesale Price
1. Heat resistance
The crocheting garden hose manufacturer tells you that the continuous working temperature indicates the heat resistance of the plastic molded product. Generally divided into physical heat resistance and chemical heat resistance. The former refers to the performance of a plastic molding pattern of a specified shape to maintain the shape of the product at a specified heating temperature; the latter refers to the thermal stability of the molecular bonds in the plastic molding material.
2. Glass transition temperature
When the temperature is higher than Tg, the amorphous polymer will become soft and rubbery. The crocheting garden hose manufacturer tells you that it is very important to ensure that the use temperature of the amorphous polymer is lower than Tg, so that the ideal mechanical properties can be obtained.
3. Heat distortion temperature
Heat deflection temperature is a popular term for deflection temperature under load. The crocheting garden hose manufacturer tells you that it is a method of measuring the rigidity of plastics at high temperatures: under a certain load, heating is continued at a certain speed until the style shows the temperature at which the amount of deformation is indicated.
Because in amorphous plastics, the deflection temperature under load is the lower limit temperature close to the glass transition temperature, so it can be a practical reference index to some extent.
However, in crystalline plastics, the deflection temperature under load is the temperature between the glass transition point and the melting point of the crystal, so it is a meaningless temperature both in theory and in practice, and the deviation of the measurement results is also obvious. The crocheting garden hose manufacturer tells you that this parameter is used to measure the ability of different materials to withstand temperature in a short period of time heating up and under load.
4. Linear expansion coefficient
The coefficient of linear expansion refers to the expansion ratio of a plastic molded product at a temperature rise of 1°C under a certain pressure, expressed as the coefficient of linear expansion relative to a unit length. The crocheting garden hose manufacturer tells you that the coefficient is one of the important indicators to understand the degree of change in the size of the product as the temperature of the plastic molded product increases.
5. Thermal conductivity
Thermal conductivity means the heat passing through a plastic product with a temperature difference of 1°C and a thickness of 1cm within 1s. It is a reference index for studying the thermal insulation of the target product when designing a product.
6. Specific heat capacity
The specific heat capacity refers to the heat capacity per unit mass (1g) of the plastic molded product. The crocheting garden hose manufacturer tells you that it generally means the heat required when the temperature of the plastic molded product rises by 1°C. The specific heat capacity is the same as the thermal conductivity, which is the reference data for studying the temperature rise of the target product during product design.
7. Embrittlement temperature
A measure of the low-temperature mechanical behavior of plastics. The crocheting garden hose manufacturer tells you that when the sample is impacted by a hammer with a certain energy, the temperature at which the probability of cracking of the sample reaches 50% is called the embrittlement temperature.
Determination of brittleness temperature: The crocheting garden hose manufacturer tells you to clamp one end of the molding pattern of the specified shape and size with experimental tongs, fix it in the experimental tank, soak it in the designated low-temperature heat transfer medium at various levels, and place it for 2.9-3.1min After that, hit it once with a hammer to find the embrittlement temperature from the result of the pattern being destroyed.

Keyword:

Scan the QR code to read on your phone

Relate News

There is currently no information to display
Please add data record on website background.

COPYRIGHT   PAPAGENO GROUP CO.,LTD

津ICP备2020007851号