Five Problems Needing Careful In Production Of PVC Base Material

- Jan 29, 2018 -

Printing of PVC film

Because of Offsctdruckereien printing inks, can not be compatible with PVC film, letterpress printing plate will be PVC ink swelling and corrosion, so usually only gravure printing and screen printing in two ways to print.

Printing inks for PVC films

Plastic film printing inks for the principle of what performance of plastic film with what performance of plastics inks, that is, the ink connector and the printed PVC film performance is the same, will have affinity, will be combined well. PVC film in the lipid, ketone, aromatic hydrocarbons and halogenated hydrocarbon solvents will be swelling and dissolution, so can not use a large number of lipids and ketones of the composite ink oxide.

Plastic bag for PVC film

Can not use direct heat and pulse type sealing machine to heat seal. If the direct heating of the bag, the bag film surface will shrink wrinkle, and the seal of the firm is also poor. can use high-frequency or ultrasonic type of sealing, hot machine to carry out heat sealing processing.

Bonding of PVC Shrink film

Many beverages, fruit juices, mineral water plastic bottles, the use of the contraction of the label interface bonding, usually used vinyl resin glue to bond, glue is used in 40%~45% vinyl chloride resin, add 55%~60% cyclohexanone solvent dissolved and made. Only the amount of glue can not be too large, otherwise the glue will be the solvent of the film, adhesion phenomenon.

The use of PVC shrink film

Added plasticizers carboxylic acid dibutyl ester, dibutyl phthalate or dibutyl succinate, dibutyl ester PVC film, has a soft, tensile, high strength, impact resistance, anti-aging and many other advantages, but there is a larger odor, can not do direct contact with food packaging.

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