Grammage and Price Calculation of the PET Sheets

PET片材的克重和价格计算

PET sheets/films are widely used in the custom paper boxes to constitute the clear window, also referred to the clear window paper box. In this article, we will talk about how to calculate the grammage and price of the PET sheets.

The density of PET is constant,  1.38 g/cm3 (20 °C). For a piece of PET sheet measured 100cm length * 100cm width * 0.1mm thick,

PET密度:1.38 g/cm3 (20 °C)。

volume =100*100*0.1/10=100cm3 ;

10丝PET克重(0.1mm厚度): 100*1.38=138gsm;

20丝PET克重(0.2mm厚度):128*2=276gsm;

30丝PET克重(0.3mm厚度):128*3=384gsm;

Therefore, theoretically the 0.2mm thick PET sheet has the grammage 276gsm;

The cost of the PET is usually priced at RMB14,800/t.

PET吨价:14800元。

10丝PET价格:138*14800/1000000=RMB2.0;

20丝PET价格:RMB4.0;

30丝PET价格:RMB6.0;

在淘宝上,100张大度PET(带双面防尘保护膜)的含运费价格大概在750元。

In theory, the per square cost of 0.2mm thick PET sheet wold be 0.6USD.

But in practice, a lot of other fees would be involved to produce the PET sheet. In reality, the per square cost of 0.2mm PET sheet is around 1.2USD.