Manufacturer of China stretch film tells you LLDPE stretch film technology:

Manufacturer of China lldpe stretch film tells you LLDPE stretch film technology:

It is often used for the inner layer film of composite soft packaging materials, and it is also the most widely used and most used plastic packaging stretch film, accounting for over 40% of the consumption of plastic packaging film. Because of the polyethylene molecules that do not contain polar groups, and high crystallinity, surface free energy is low, therefore,lldpe stretch film printing performance is poorer, to the poor adhesion of inks and adhesives, so the need for surface treatment before printing and composite.

process

Low-density polyethylene stretch film generally adopts the following two ways:

Blow molding

Stretch film

The thickness of LLDPE stretch film is even, but it is seldom used at present because of the high price. Blow molding LLDPE stretch film is made by blow molding PE particles through blow molding machine

Blown out of the lower cost, so the most widely used. Low density polyethylene film is a kind of semitransparent, glossy, soft film with good chemical stability, heat sealing, water resistance and moisture resistance

Freeze and boil. The main drawback is the poor barrier to oxygen

LLDPE stretch film advantages and disadvantages:

Advantages:

Mechanical performance is good, tensile strength is one of the tallest of all the plastic film is quite good hardy excellent heat resistance, applicable temperature range of 70 ℃ ~ 150 ℃, melting point 260 ℃, softening point 230-240 ℃ is extremely excellent size stability is good, LLDPE stretch film at high temperature shrinkage rate is still very small. Good gas resistance, oil resistance, most solvents, dilute acid, dilute alkali transparency, light transmittance more than 90%, LLDPE stretch film to prevent poor uv penetration.

Disadvantages:

LLDPE stretch film has high cost

jining hongxiang packing material co.,ltd