Pe&pp Net Machine

Properties of PP vs PE plastic
The properties of PP and PE depend on their chemical structure.
PP is a semi-crystalline polymer, meaning that it has a more ordered structure than PE. This shows PP better strength and durability. On the other hand, PE is a fully amorphous polymer, indicating that it has a less ordered structure. By this, PE is more flexible and easier to process.

Imagine a pile of gum. If you chew it for a long time, it will become soft and pliable, like PE. But if you leave it out to dry and harden, it will become brittle and break easily, like PP.

Some key factors to differentiate polypropylene (PP) and polyethylene (PE)
● Molecular weight: Polymers with higher molecular weights tend to be more sturdier and durable.
● Crystallinity: Semi-crystalline polymers, such as PP, have a more ordered structure than amorphous polymers, such as PE. This makes semi-crystalline polymers stronger and more durable than amorphous polymers.

● Branching: Branched polymers are more flexible and process with ease than linear polymers.
● Molecular orientation: Oriented polymers have their molecules aligned in a specific direction, which gives them better strength and stiffness.

These factors can be optimized during the manufacturing process of PP and PE with the desired properties. For example, PP can be blended with other polymers, such as PE, to improve its flexibility and processability. PE can be cross-linked to improve its strength and durability.

Production reasons: Uneven feeding, damaged or poorly lubricated main motor bearings, malfunctioning or non heating of a certain section of the heater, incorrect screw adjustment pad or phase, component interference.

Solution: Check if each heater is working properly, replace the heater if necessary, check the adjustment pad, pull out the screw to check for any interference, inspect the feeder, troubleshoot, repair the main motor, and replace the bearings if necessary.

Polyethylene foam cotton is a non crosslinked closed cell structure, also known as EPE pearl cotton, which is a new environmentally friendly packaging material. It is composed of countless independent bubbles generated by physical foaming of low-density polyethylene grease. Overcoming the shortcomings of ordinary foam adhesive, such as fragility, deformation, and poor recovery.

Foam net covering machine has many advantages, such as water and moisture resistance, shockproof, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong collision resistance, and also has good chemical resistance. It is an ideal substitute for traditional packaging materials.

Process flow: Automatic feeding unit - extruder unit - foaming agent injection unit - anti shrinkage agent injection unit - automatic mesh changing system - extrusion die head unit - wind ring - shaping drum unit - flattening unit - traction unit - winding unit Main technical parameters: application resin: LDPE sheet thickness: about 0.3-4.5mm Sheet width: about 1000-1400mm Production line speed: 10-80 meters/split die structure: circular expansion die head, adjustable die mouth Material: carbon alloy steel Foam principle: butane foaming, physical foaming, environmentally friendly cooling method: air cooling and water cooling Product use: Polyethylene foam cloth, also known as pearl cotton, is a new type of packaging material with flexibility The characteristics of toughness, lightweight, and elasticity enable it to absorb and disperse external impact forces through bending, achieving a cushioning effect, Foam net cover machine is mainly used for packaging of precision electronic components, electronic communication equipment, auto parts, furniture, equipment, fragile products, etc.