FAQ's Helpcenter LDPE/PP

Frequently Asked Questions

Polyethylene is a plastic and is divided into different types:
  • PE-HD (HDPE): high density polyethylene (0.94 – 0.97 g/cm³); the polymer chains are weakly branched together

  • PE-MD (MDPE): medium densi...

Uniform branches with only a few short side chains with a density between 0.87 g/cm³ and 0.93 g/cm³ ("LLD" stands for "linear low density")

It is a soft polyethylene that is produced under high pressur...

Strongly branched polymer chains, therefore low density between 0.915 g/cm³ and 0.935 g/cm³ ("LD" stands for "low density")

It's a soft polyethylene. which is produced under high pressure. This is the ...

Packaging material marked "food safe" or "suitable for food" may be used in direct contact with food without health concerns.

Furthermore, neither the taste nor the smell of the food should be affected...

In general, all PE types are not resistant to UV rays. Exceptions to this are the black-colored types, which are resistant to UV rays, also in conjunction with atmospheric oxygen.

During the polymeriza...

The surface resistance of polyethylene (PE) is a measure of how well or poorly a material conducts electrical current. It indicates the resistance along the surface of the material and is usually meas...

Barrier properties of polyethylene refer to no or only minimal permeability to gases (e.g., oxygen, carbon dioxide, nitrogen), vapors (e.g., water vapor), and aromas. Low permeability values ​​also in...

Water vapor permeability or water vapor diffusivity refers to the permeability of a coating or paint to water vapor.

The water vapor permeability of plastic (PE) films is a fundamental property of film...

Polypropylene is a thermoplastic produced by the chain polymerization of propen. It belongs to the polyolefin group, is nonpolar, and semi-crystalline. Its low density ranges from 0.895 g/cm³ to 0.920...

Average density between 0.930 g/cm³ and 0.940 g/cm³. The melting point is 125 to 128°C. Temperature resistant from -50°C to +90C. Created by mixing LDPE and HDPE, combining the properties of LDPE and ...

Plastics (polymers) can be divided into three classes according to the structure-property principle: thermoplastics (which can be reshaped at higher temperatures), duroplastics (hard, crystalline plas...

In order to determine the dimensions of a shrink hood or box hood, it is important to calculate the optimal height.

How are the dimensions determined correctly?



Since material is lost through the side f...

HDPE stands for high-density polyethylene. It is a thermoplastic made from ethylene. HDPE belongs to the polyolefin family and is one of the most widely used plastics worldwide.

Weakly branched polymer...

Yes, polyethylene is easy recyclable. In Germany almost all plastics are collected, sorted and recycled via the dual system. Polyethylene has the largest share of recycled plastics, followed by polypr...

As a plastic packaging buyer, you've probably noticed the skyrocketing price increases and raw material shortages. Since the year 2000, the prices for polyethylene, the basic material for LDPE, MDPE a...

Most plastics have an electrical surface resistance of >1015 ohms and are therefore electrostatically chargeable. This can lead to dust attraction and sparking. By using antistatic Masterbachtes, the ...

R-LDPE is produced by collecting, sorting, and recycling used LDPE. Recycling is usually done mechanically (e.g., shredding, washing, extrusion).

Our rLDPE granules is pure, recycled reprocessed produc...

The material resistance of LDPE and PP is not as high as that of HDPE due to the higher density. LDPE is resistant to water, diluted acids, alkalis, solutions of inorganic substances, solvents, alcoho...

The term masterbatch or color granules refers to plastic additives in the form of granules. They are also called "polymer-bound additives". The density is higher than pure LDPE granules. They are adde...

Despite all the electronic production monitoring tools, minor deviations cannot be avoided. These are often caused by external temperature fluctuations during extrusion.

The permitted tolerances and te...

As a manufacturer and supplier of plastic packaging, we are very aware of our responsibility when it comes to sustainability and environmental protection. We are constantly looking for sustainable alt...

These are the most frequently asked questions in our FAQ's helpcenter. For all other questions, please use our polymer contact form.

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Polymer-Synthese-Werk GmbH

47495 Rheinberg/Germany

Manufacturer of bags, films and tubes made of LDPE, MDPE and PP.

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