The market for speciality plastic films is driven by the increasing acceptance of bioplastics. Various useful properties of speciality plastic films such as B. High tensile strength, durability, high temperature, humidity, and chemical and gas resistance will increase the demand in food and beverage packaging applications.
Speciality plastic films are lightweight, puncture-resistant, and improve aesthetic appearance, increasing the marketability of food and beverage products. The growing demand for packaged food and beverage products is expected to drive the need for fresh packaging techniques and effective packaging materials such as speciality plastic films. Rising demand for packaged food is a major factor driving the development of the speciality plastic film market.
Cellulose Acetate (CA) is the main cellulose ester. It is a tough, easy-to-process thermoplastic with excellent clarity and lustre, and almost no odour. It has a high water vapour transmission rate, very low haze but very low water permeability, and is easy to cut and tear. CA is biodegradable and generally recognized as safe. It is commonly used for semi-permeable film applications such as food packaging and drug delivery systems.
Cellulose Acetate Butyrate (CAB) films are known for their chemical resistance and toughness. This film has high transparency, high strength and toughness, excellent scratch resistance, UV resistance and long-term weather resistance. It can be matte or high gloss. CAB is tougher and less hygroscopic than cellulose acetate, making it suitable for more demanding applications.
Ethylcellulose (EC) is another important commercial cellulose ether derivative. The film exhibits excellent strength at room temperature but loses strength rapidly with increasing temperature. Like methyl cellulose, it has excellent UV resistance, but it is soluble in many solvents, but not in non-polar solvents such as aliphatic hydrocarbon oils and natural oils. This makes the film useful for certain food packaging applications and as a barrier coating for controlled drug release in pharmaceuticals. Heat sealing is difficult if the surface is not activated.
Ethylene Vinyl Acetate or EVA is a copolymer of ethylene and vinyl acetate. It is a very resilient and tough thermoplastic with good clarity and gloss and little or no odour. It has excellent adhesion to many substrates, excellent flex crack resistance and excellent adhesion and heat seal properties. It is used in a variety of film applications but has been replaced by metallocene PE in most food packaging due to its faster hot-tack capability. However, demand for EVA remains strong in other applications such as PVC replacement, solar panel encapsulation, and glass lamination for improved impact resistance.
Ethylene Vinyl Alcohol Copolymer or EVOH is a flexible, crystal clear, lustrous thermoplastic copolymer with excellent flex crack resistance and very high resistance to hydrocarbons, oils and organic solvents. It also has excellent barrier properties against gases such as oxygen, nitrogen, and carbon dioxide, making it particularly suitable for storing perishable products such as food, medicine, pharmaceuticals, and agricultural products.
Methylcellulose (MC) is the most important commercial cellulose ether. This is the simplest ether derivative in which the methoxy group is replaced by a hydroxyl group. The key properties of this film are its water solubility and its ability to gel when exposed to heat. Although water soluble, methyl cellulose films typically retain their strength and do not become tacky when exposed to moisture. MC films exhibit excellent strength and low elongation at room temperature but lose strength rapidly with increasing temperature. MC also has excellent UV resistance, oil resistance, and solvent resistance.
Polychlorotrifluoroethylene (PCTFE) is a transparent thermoplastic film sold under the brand name NEOFLON. It has excellent moisture and chemical resistance, excellent electrical insulation, and very low moisture and gas permeability. Mainly used for general insulation applications and circuit boards.
Polyethylene glycol (PEG), often called polyethylene oxide (PEO), is a water-soluble film. PEG is mainly used in food powder products that can be dissolved in water without opening the package.
Plexiglass Film is a pure polymethylmethacrylate (PMMA) film with high clarity. It has good mechanical properties, good weather resistance and good wear resistance. PMMA is partially co-extruded with PVDF, providing excellent chemical resistance due to the PVDF surface. Plexiglas is often used as a UV protective film to improve the exterior weather ability of laminates such as headlights. Therefore, it is also used as a light diffusion film.
To choose a product that is optimized in terms of your economic and qualitative needs, you need to know what to look for. Factors like the amount of time the packaging has to be on, the composition, weight, size, state, and shape of the packaged product give you an idea of what plastic packaging material will be the best for you.
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