Preparation and Properties of PET Masterbatch for Food Packaging
In this paper,using titanium dioxide(rutile type),carbon black,polyethylene terephthalate(PET)powder and ultraviolet absorbent as raw materials,PET light blocking masterbatch was prepared by melt blending process.The optical resistance and mechanical properties of the prepared samples were tested by spectrophotometer and universal mechanical testing machine.The results show that the addition of light blocking masterbatch can obviously improve the light blocking performance of PET material for food packaging,and play a good light shielding effect;when the addition amount of masterbatch is 0%～15%,with the increase of the addition amount,the light resistance performance of the material is more and more excellent,and the tensile strength,bending modulus and specific gravity of the sample are also increased.The notched impact strength of the simple supported beam decreases gradually with the increase of the amount of light blocking particles.In addition,increasing the amount of light blocking masterbatch can also improve the melt flow rate.
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