Polypropylene films of spunbond polyethylene and polypropylene films generally refer to biaxially oriented polypropylene films. Biaxially oriented polypropylene film (BOPP) is usually a multi-layer pneumatic film. After polypropylene particles are formed into sheets by pneumatics, they are made by stretching in two directions. Due to the stretched molecular direction, the film has good physical stability, mechanical strength, air tightness, high transparency and gloss, toughness, wear resistance, widely used printing film, the thickness is generally 20 ~ 40 m, the most widely used is 20 m. The main disadvantage of biaxially oriented polypropylene film is its weak heat-sealability, so it is generally used as the outer film of the composite film such as moisture-proof, transparent, strength, rigidity, and printability after being compounded with polyethylene film. It is suitable for storing dry food. The surface of biaxially oriented polypropylene film is non-polar, high in crystallinity, and low in surface free energy, resulting in decreased printing performance, decreased adhesion to inks and adhesives, and requires surface treatment before printing and lamination.

What are the characteristics of polypropylene film of spunbond polyethylene and polypropylene film?

Biaxially oriented polypropylene film [1] has the advantages of light weight, non-toxic, odorless, moisture-proof, mechanical strength, dimensional stability, printing performance, transparency and so on. It has the advantages of high transparency, gloss, barrier property, impact strength and low temperature resistance. The disadvantage is that film shrinkage is prone to occur during thermal bonding (except when heat shrinkable smoke screens utilize heat shrinkage properties). Its comprehensive performance is better than moisture resistance. Cellophane, polyethylene (PE) film, PET film. BOPP film also has excellent printing results. The representative physical data are: haze <1.5%; gloss>85%; tensile strength (longitudinal/transverse)>120/200MPa; elongation at break (longitudinal/transverse) <180%/65%; elastic modulus It is 1700～2500Mpa; the embrittlement temperature is -50℃.

Advantages: high tensile strength, good barrier properties and high transparency.

The orientation of the molecules improves the crystallinity, the tensile strength, impact strength, stiffness, toughness, moisture absorption and transparency are improved, and the frost resistance of the film is also improved.

Has good resistance and moisture resistance

High transparency, good gloss, good printing adaptability

Non-toxic, tasteless, tasteless and can be directly used in contact with food and medicine.

What are the physical properties of polypropylene films of spunbond polyethylene and polypropylene films?

Disadvantages: The elongation is lower than PP, the heat sealing performance is poor, and it is not easy to seal when used independently. When used, it is usually a film compound with good heat sealing performance such as PE.

Advantages: high tensile strength, good barrier properties and high transparency.

What is the application of polypropylene film for spunbond polyethylene and polypropylene film?

Widely used in the packaging of food, candy, tobacco, tea, juice, milk, fabrics, etc. It has the nickname of "Packaging Queen". The wide range of BOPP films, low pollution, and protection of forest natural resources make it a more popular packaging material than paper and polyvinyl chloride (PVC). The manufacturing process is simple, stable and inexpensive, and is used as a more widely used packaging material than biaxially oriented polyester (BOPET) film and biaxially oriented nylon (BOPA) film. BOPP film can be synthesized with PE film, saliva polypropylene (CPP) film, polyvinyl chloride (PVDC), aluminum film and other special performance materials to further improve or improve performance.