تجهیزات آزمایشگاه PVC

PVC Lab Equipment
 Introduction to the tests used in pvc:

Dimension Test: This standard specifies the dimensions that the product must meet. Caliper and circometer instruments can measure wall thickness, outer diameter and maximum bifurcation.

Impact Strength Test: In this test, after placing the upvc tube at zero degrees Celsius, depending on the dimensions of the pipe, the weight of the specified height and the specified number of impulse tubes shall be applied to the test specimen only up to 10 5% of the samples are allowed to break.

Resistance to Inner Pressure at 20 C 1 ه C (Hydrostatic Test): One of the toughest tests for a water pipe in which the pipe is placed in a pool of water and at a certain pressure applied to it that within one hour the pressure should not leak or Observe the burst in the tube, the production of such a tube requires precise temperature, material composition and device configuration and is one of the reasons for the low production of such tubes.

Maximum longitudinal reversal: the upvc polymer tends to be twisted at the time of production of this polymer, which is slightly stretched and then cooled, with the heat obtained in the u-pvc tube being slightly shorter if soft material is produced in the tube. Used (to prevent pipe breakage in impact test - such as DOP oil), this longitudinal reversal will exceed the standard limit (5%).

Specimen density in kilograms per cubic meter: The standard density at 23 C 1 C C should be 1350 kg / m3 ≤ 1460 kg / m3. Since the density of the filler is almost twice the permissible amount, less than 5% of the filler must be consumed and this is one of the reasons that such pipes are less produced.

Wickat softening temperature: The upvc tube should be hard to produce due to temperature variations, so this test is used to test that the pvc grade is within the hard range as well as the softener is not used. The wicket machine contains a needle with a weight of 5kg. It is placed on certain dimensions of the pipe (3 x 8 cm) and is heated simultaneously in the oil tank. The needle of the device must not be less than one millimeter in diameter at a diameter of 80 ° C.

Resistance to chloro-methane at 0 ° C: The polymerization process of the pipe is not complete if (so-called curing is not good) the pipe disappears over time or due to chemicals, so to measure whether the curing is complete or No, a liquid called dichloromethane (CH2Cl2) is used. Dichloromethane (CH2Cl2) because it is chlorinated and also liquefied can be polymerized into layers and if the polymerization is incomplete polymerization of upvc powders. It can damage the unpolymeric polymer and cause deep and superficial damage to the pipe, so the baking process and components and how the extruder works in this test are very important. That's important.