The Function of PE Coating Flame Retardant
PE film, also known as polyethylene film, is a type of thin film material with special functions formed by uniformly coating hot-melt PE (polyethylene) plastic film on the surface of a substrate such as paper or non-woven fabric. Adding flame retardants to it is to enhance the flame retardancy of the material and meet the specific fire safety requirements in certain fields.
Introduction:
PE film, also known as polyethylene film, is a type of thin film material with special functions formed by uniformly coating hot-melt PE (polyethylene) plastic film on the surface of a substrate such as paper or non-woven fabric. The following is a detailed introduction about PE coating:
1、 Material characteristics
a. Waterproof and oil resistant: The material coated with PE film has significant waterproof and oil resistant properties, which can effectively block the penetration of moisture and oil.
b. Environmental friendliness: The entire coating process does not use any chemical solvents, making it very environmentally friendly. At the same time, in the subsequent secondary processing, there is no need to use adhesives, and the hot melt property of PE film is directly used for sealing.
c. Strong bonding: Due to the fact that the PE film is hot-melt on the surface of the substrate, the bonding with the substrate is very strong and not easy to separate.
d. Breathability (for non-woven fabric substrate): PE coated non-woven fabric not only maintains waterproof performance, but also has a certain degree of breathability, which can effectively isolate moisture, discharge hot air and moisture.
2、 Application Fields
a. Food packaging: PE coated paper is commonly used to make packaging materials such as food paper boxes, paper cups, and paper bags. It has moisture-proof and oil proof functions, protecting food from contamination.
b. Industrial waterproofing: In the industrial field, PE coated paper is often used as waterproof paper, attached to the surface of building materials to prevent water and gas from entering the interior of the board.
c. Medical supplies: PE coated non-woven fabric is also widely used in the medical field, such as medical dressings, surgical supplies, protective clothing, etc. It is favored due to its waterproof, antibacterial, breathable and other characteristics.
d. Environmentally friendly products: PE coated non-woven fabric is also used to make eco-friendly bags and other daily necessities, replacing traditional plastic bags and reducing environmental pollution.
3、 Types and classifications
a. Coated paper: mainly divided into single plastic PE coated paper and double plastic PE coated paper. Single plastic coated paper is coated with PE film on only one side, while double plastic coated paper is coated with PE film on both sides.
b. Coated non-woven fabric: Combining the softness of non-woven fabric with the waterproofness of PE film, it has a wider range of application prospects.
4、 The function of flame retardants
a. Improving flame retardancy: Flame retardants can effectively reduce the flammability of PE coating materials, slow down the spread of flames, and even self extinguish the material after the fire source is removed under certain conditions.
b. Maintaining material properties: Excellent flame retardants not only significantly enhance the flame retardancy of materials, but also strive to maintain their original properties, such as mechanical strength, flexibility, weather resistance, etc.
c. Environmental Protection and Safety: The development trend of modern flame retardants is environmentally friendly, non-toxic, low smoke, and halogen-free, in order to reduce potential harm to the environment and human health.
5、 Types of flame retardants
a. Halogen flame retardants: including bromine flame retardants, etc., have good flame retardant effects, but may produce harmful hydrogen halide gases.
b. Phosphorus based flame retardants: By promoting the formation of a carbonized layer on the surface of materials to prevent flame spread, they have good environmental friendliness.Inorganic filler flame retardants, such as aluminum hydroxide, magnesium hydroxide, etc., exert flame retardant effects by endothermic decomposition and dilution of combustible gases, but may affect the transparency and mechanical properties of the materials.
c. Synergistic agent: Used in combination with other flame retardants to enhance flame retardancy while potentially reducing the amount of flame retardants used.
6、 Application examples
PE coated flame-retardant materials have been widely used in various fields, such as flame-retardant packaging materials, flame-retardant building film materials, flame-retardant wire and cable sheaths, etc. These materials not only ensure safety, but also meet the diverse needs of different industries for material properties.
In summary, adding flame retardants to PE film is one of the effective ways to improve the flame retardant performance of materials. In practical applications, appropriate types and amounts of flame retardants should be selected according to specific needs and conditions, and attention should be paid to process optimization and quality control.
Our Shijiazhuang Qibo Technology has developed a flame-retardant masterbatch, which is mixed with raw materials in a certain proportion during production and fed to the machine. It can directly produce films with flame-retardant properties without twin-screw machinery. There are already many customers both domestically and internationally who are interested in purchasing our PE coated flame-retardant masterbatch.
