Como realizar a inspeção de sacolas feitas de lona?

Quando eu executo a inspeção de bolsa, descobrimos que nos últimos anos a lona se tornou um material popular para bolsas, especialmente para sacos térmicos de alimentos ou mochilas. Como é de fácil limpeza e qualidade à prova d'água, junto com seu baixo custo, a lona será mais amplamente utilizada na indústria de sacolas. Portanto saber como a lona é produzida é o primeiro passo da inspeção da sacola que dela é feita.

O caminho para a inspeção de sacos fazendo lonas:

1.Three main kinds of raw materials are necessary for tarpaulin, which includes Pvc powder/chips, plasticizer and stabilizer, plus some additives, go through high speed stirring with heat.
2. Plasticization of Banbury mixer (it decides the color of the material. And it depends on sequence of added materials, volume, temperature, speed of the machine, time of the reaction, pressure of the machine, type of the rotor and so on) ;
3. Go through filtering machine;
4. Go through calendar machine and become PVC film;
5. The two layers of pvc films are heated on laminating machine, the top and the bottom. There is another layer of mesh in the middle, and then through the high pressure of the laminating machine and become of final tarpaulin material.

The tarpaulin material will through finish product machine and be cut well and be rolled up in correct length. The tarpaulin material will go through finish product machine and be cut well and be rolled up in correct length.

So you will know the colour of tarpaulin is not the colour of mesh at all. It is the colour of PVC layer of top and bottom. Usually we call the shining layer top and the mesh grain layer bottom. We must keep this in mind during the bag inspection.

Should you have any questions, please feel free to contact us at abel@abelinspection.com.