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How to distinguish the plastic material for plastic bag( simple ways )

Author:plastic bag    Time:15/01/09    Click:

1.PE ( HDPE and LDPE ) for plastic bag

    High pressure appearance look more smooth,  good toughness, a lot of handbag is made of LDPE And HDPE stretching force is very good, hardness is taller Widely used in shopping mall, all kinds of procurement market vest bag are generally made of HDPE
The simplest method is to use hand tear it Because of HDPE is low density tend to have white marks But not for LDPE
 
plastic bag
PE ( HDPE and LDPE ) for plastic bag

2.OPP for plastic bag

     OPP with  very high transparent feature , the pulling force is not so good as PE  .If there is no gap is hard to tear, but if there is a little gap is easy to tear .
Also , OPP bag printing effect is easy decoloration . So our company (YONGLIANTAI packing company )usually compound other material then could keep the good printing effect . 
OPP for plastic bag
OPP for plastic bag

      Also Introduce two kinds of distinguish whether the vacuum packing bag with reworked material

- one is  look at colors added food reworked material of aluminum foil bag According to how much, add the reworked material can have different color, add the reworked material, the color will be deep, add the reworked material color shallow some less But add less, the quality of reworked material high some plastic bags, if there is no new material compare, not professionals are hard to distinguish

-the other simple way is smell Don't add the reworked material of plastic bags If you add less. It will be smaller . If the material is not new material is easy to break, the other is the tensile strength and toughness. Reworked material of aluminum foil bag tensile strength toughness characteristics will become price difference
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