Six identification methods of PVC plate

In fact, we know that the flow characteristics of PVC plastic plate are quite poor, and its process range is very narrow. In particular, large molecular weight PVC materials are more difficult to process, so the PVC materials are usually used with small molecular weight. PVC shrinkage rate is quite low, generally 0.2~0.6%.PVC plastic board has non-flammability, high strength, weather resistance and excellent geometric stability. Today, we will come to talk with you about the performance of pvc plastic board identification related situation!

First, pvc plastic board performance identification
PVC plate
1, pvc plastic board performance identification - mechanical properties: PVC plastic board has higher hardness and mechanical properties. And increased with increasing molecular weight, but decreased with increasing temperature. Rigid PVC plastic board has good mechanical properties, and its elastic modulus can reach 1500-3000MPa. The elasticity of soft PVC is 1.5-15 MPa. But the elongation at break is as high as 200%-450%. The friction property of PVC is general, the static friction coefficient is 0.4-0.5, the dynamic friction coefficient is 0.23.

2, pvc plastic board performance identification - general performance: PVC resin is a white or light yellow powder, the relative density is 1.35-1.45. The hardness of the product can be adjusted by adding the number of plasticizer. Pure PVC water absorption and air permeability are very little.

3, pvc plastic board performance identification - electrical properties: soft PVC board is a kind of polymer with good electrical properties, but because of its larger polarity, electrical insulation is not as good as PP board and PE plastic board. Dielectric constant, dielectric loss Angle tangent value and volume resistivity, corona resistance is not good, generally suitable for low and medium voltage and low frequency insulation materials.

4, pvc plastic plate performance identification - thermal properties: PVC plastic plate heat stability is very poor, 140℃ that begins to decompose, melting temperature is 160℃. PVC linear expansion coefficient is small, with inflammability, oxidation index up to 45 or more.

5, pvc plastic board performance identification - environmental performance: PVC can resist most inorganic acid, alkali, salt, most organic solvents. Suitable for medicine, chemical preservative material.

Two, six secrets let you learn to pvc plastic board performance identification method:

1. Look at its exterior gloss: poor gloss is recycled plastic, not PVC.

2. Tolerance: recycled plastic is also much worse.

3. Look at its cutting surface: there will be mixed materials with different colors inside the recycled plastic after cutting.

4. Density: Throw into the water to see if it is floating on the surface of the water, most of the regeneration will sink to the bottom.

5. Heating welding: there will be smoke when welding recycled plastics.

6. Transmittance: The transmittance of PVC plastic board is excellent.