PC、PET、PMMA、PI、PP等膜片材特性及应用

1、 PC film

1. Characteristics
A colorless or slightly yellow thermoplastic engineering plastic that is amorphous, odorless, non-toxic, and highly transparent. It has excellent physical and mechanical properties, especially excellent impact resistance, high tensile strength, bending strength, compression strength, low creep resistance, and dimensional stability; It has good heat resistance and low temperature resistance, and has stable mechanical properties, dimensional stability, electrical properties, and flame retardancy over a wide temperature range.
Operating temperature:- 30～120℃
Thickness: 0.07-1.0mm
Surface effect: smooth surface, sand surface, brushed surface
2. Scope of application
Flame retardant PC film is widely used in electronic components, electrical enclosures, switch panels, junction boxes and charger enclosures, automotive instruments and meters, and panel printing with flame retardant requirements. Printing grade frosted PC film is suitable for special printing, helmets, signs, nameplates, protective covers, etc. Anti scratch PC film applied to mobile phones MP3、MP4、DVD、 Window lenses for electronic products such as backlights.

2、 PET film

1. Characteristics
PET film, also known as high-temperature resistant polyester film. Has excellent physical and chemical properties, dimensional stability, transparency, and recyclability. Excellent mechanical properties, with the best strength and toughness among all thermoplastic materials. Its tensile and impact strength are much higher than that of ordinary films, and it has good stiffness, dimensional stability, excellent heat and cold resistance, as well as good chemical and oil resistance.
Operating temperature:- 60～120℃
Thickness: 0.125mm-0.35mm
Surface effect: smooth surface, sand surface, brushed surface
2. Scope of application
PET film can be divided into: PET heat shrinkable film, PET antistatic film, PET high brightness film, PET reflective film, chemical coating film, etc. The chemical coating film is mainly used to improve the surface performance of PET film. Coating with acrylic acid lotion can improve the printability of PET, and coating with polyurethane aqueous solution can strengthen the adhesion between aluminum coating and PET base film; PET high gloss film is mainly used in high-end vacuum aluminum plated products and laser anti-counterfeiting base films due to its excellent mechanical and optical properties; PET reflective film is mainly used in reflective billboards, traffic reflective signs, and industrial safety signs due to its excellent optical properties, aging resistance, and good thermal stability.

3、 PMMA film

1. Characteristics

PMMA film, also known as polymethyl methacrylate film, is non-toxic and environmentally friendly, with good chemical stability and weather resistance. Good comprehensive mechanical properties, ranking among the top in general plastics, and PMMA resin is not prone to producing sharp fragments when broken. The United States, Japan and other countries and regions have made mandatory regulations in their laws that PMMA resin must be used for glass in primary, secondary and kindergarten buildings.

Operating temperature:- 30～80℃

Thickness: 0.5mm-8mm

Surface effect: smooth surface, sand surface, brushed surface

2. Scope of application

PMMA film has a wide range of applications, including the automotive industry (signal lights, instrument panels, etc.), pharmaceutical industry (blood storage containers, etc.), industrial applications (DVDs, light diffusers), electronic product buttons (especially transparent ones), and daily consumer goods (beverage cups, stationery, etc.). Due to its excellent optical properties, the transparency of white light is as high as 92%. PMMA products have very low birefringence, making them particularly suitable for making DVDs and advanced optical lenses.

4、 PI film

1. Characteristics

PI film, also known as polyimide film, is a new type of high-temperature resistant organic polymer film. It is currently the world's best performing thin film insulation material, with excellent mechanical properties, electrical properties, chemical stability, as well as high radiation resistance, high temperature resistance, and low temperature resistance.

Operating temperature:- 269～280℃

Thickness: 0.0125 mm -0.25mm

Surface effect: Golden mirror finish

2. Scope of application

PI is currently the world's best performing thin film insulation material, and also the most heat-resistant variety among industrialized polymer materials. Due to its superior comprehensive performance, it is widely used as a thin film in various fields such as aviation, navigation, spacecraft, rocket missiles, atomic energy, electronic and electrical industries.

5、 PP film

1. Characteristics

PP film is divided into unstretched film and biaxially stretched film. Untretched polypropylene film includes blown polypropylene film (IPP) produced by extrusion blow molding method and extruded cast polypropylene (CPP) produced by T-mold method. Biaxially oriented polypropylene film (BOPP) is a new type of film developed to replace glass paper. It has the characteristics of high mechanical strength, good toughness, good transparency and glossiness.

Operating temperature:- 15～55℃

Thickness: 0.05mm -0.35mm

Surface effect: excellent glossiness, good transparency

2. Scope of application

PP film is widely used in various aspects of daily life due to its excellent properties, including heat sealing film for printing and composite bag making; Ultra thin high extinction film made of paper plastic composite for books, advertising brochures, gift bags, etc; Back coated silicone oil release film for the protection of plasters, labels, silent adhesive tapes, and other adhesive products; Isolation protective film used for winding and forming isolation protection of fishing rods, golf clubs, and other industrial products; Heat sealable aluminum plated film directly used for food packaging in bag making; Used for the production of high transparency adhesive tapes, high transparency films for paper product composites, and so on.

6、 PS film

1. Characteristics

PS film, also known as polystyrene film, has high transparency and glossiness, is aesthetically pleasing, has good printing performance, and excellent metal vapor deposition properties; Low water absorption and high permeability to gases and water vapor. PS film is divided into unstretched film and biaxially stretched film. Untretched PS film is hard and brittle, with little practical value; The physical and mechanical properties of BOPS film subjected to biaxial stretching have been significantly improved, while still maintaining its original transparency and glossiness.

Operating temperature:- 40～95℃

Thickness: 0.1mm-1mm

2. Scope of application

PS film is mainly used for thermoforming various cups, plates, dishes, fast food boxes, pharmaceuticals and other packaging products. It is also commonly used for window and light food packaging in paper box packaging. In addition, when attached to metal foil, it can be used for insulation and EMI/FI shielding. For example, PC light diffusion film has anti-static effect and good weather resistance, especially suitable for LCD backlight module use.

7、 Composite film

1. Characteristics

Composite film is a polymer film composed of two or more layers of different film materials. Through composite, materials with comprehensive properties of each individual material can be obtained. The substrates used mainly include various film plastics such as PE, PC, PP, PA, PVC, PET, etc. In the production and application process, it is often encountered that the characteristics of one material cannot meet the performance requirements of the product, which requires composite film materials with comprehensive performance. There are many types of film materials with such comprehensive and excellent properties, which are increasingly widely used.

PC PET film: possessing the high mechanical properties of PC and the high temperature resistance of PET material;

PC PMMA film: It has the characteristics of high hardness, impact strength and aging resistance, and the optical effect of high performance PMMA;

PC PBT film: excellent formability, dynamic load capacity, and chemical resistance, with good printing and cutting performance and application range.