Thermoforming Film Has Been Widely Used in Food, Medicine

Plastic packaging and plastic packaging products are taking up more and more shares in the market, especially composite plastic flexible packaging. Thermoforming Film has been widely used in food, medicine, chemical and other fields, and food packaging has the largest proportion, such as Beverage packaging, quick-frozen food packaging, steamed food packaging, fast food packaging, etc., these products have brought great convenience to people\\\'s lives. Thermoforming Film is mainly divided into the following categories according to the material:

1. PVA coating high barrier Thermoforming Film. PVA coated high-barrier Thermoforming Film is made by coating PVA with nano-inorganic substances on polyethylene Thermoforming Film and then printing and compounding. Without greatly increasing the cost, its barrier performance is not only significantly better than that of EVOH. Layer co-extrusion Thermoforming Film, and the packaging cost has also been greatly reduced. This not only ensures all the quality requirements of the aseptic packaging of the packaged material, but also greatly reduces the cost of aseptic packaging for food processing enterprises. It can be used for packaging beverages and juices. , Milk, soy sauce, vinegar, etc.

2. Biaxially oriented polypropylene Thermoforming Film (BOPP). Biaxially oriented polypropylene Thermoforming Film is made by co-extrusion of polypropylene particles to form a sheet, and then stretched in both vertical and horizontal directions. Due to the orientation of the stretched molecules, this Thermoforming Film has good physical stability, mechanical strength, air tightness, high transparency and gloss, toughness and wear resistance. It is currently the most widely used printing Thermoforming Film, and the general thickness is 20~40μm, the most widely used is 20μπι. The main disadvantage of biaxially oriented polypropylene Thermoforming Film is poor heat sealability, so it is generally used as the outer layer of Thermoforming Film for composite Thermoforming Film. For example, it has better moisture resistance, transparency, strength, stiffness and printability after being compounded with Polyethylene Thermoforming Film. Ideal for holding dry food. Because the surface of biaxially oriented polypropylene Thermoforming Film is non-polar, has high crystallinity, and low surface free energy, its printing performance is poor, and its adhesion to ink and adhesive is poor. It needs to be processed before printing and lamination. Surface treatment.

3. Low-density polyethylene Thermoforming Film (LDPE). Low-density polyethylene Thermoforming Film is generally made by two processes: blow molding and casting. The thickness of cast polyethylene Thermoforming Film is uniform, but because of its higher price and lower cost, it is the most widely used. Low-density polyethylene Thermoforming Film is a translucent, shiny, soft-textured Thermoforming Film. It has excellent chemical stability, heat sealability, water resistance and moisture resistance, freezing resistance, and can be boiled. Its main disadvantage is its poor barrier to oxygen. It is often used as the inner layer of Thermoforming Film for composite flexible packaging materials. It is also currently the most widely used and the largest amount of plastic packaging Thermoforming Film, which accounts for about the consumption of plastic packaging Thermoforming Film. More than 40%. Since the polyethylene molecule does not contain polar groups, has high crystallinity, and low surface free energy, the Thermoforming Film has poor printing performance and poor adhesion to inks and adhesives, so before printing and lamination Need surface treatment.

4. Polyester Thermoforming Film (PET). Polyester Thermoforming Film is a Thermoforming Film made of polyethylene terephthalate as a raw material, which is made into a thick sheet by an extrusion method, and then biaxially stretched. It is a colorless, transparent and glossy Thermoforming Film with excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, abrasion resistance, high and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention It has good properties and is one of the commonly used barrier composite Thermoforming Film substrates. However, the price of polyester Thermoforming Film is relatively high, with a general thickness of 12μπι. It is commonly used as the outer layer of retort packaging and has better printability.

5. Nylon Thermoforming Film (PA). Nylon Thermoforming Film is a very tough Thermoforming Film with good transparency, good gloss, high tensile strength, high tensile strength, and good heat resistance, cold resistance, oil resistance and organic solvent resistance Good resistance, abrasion resistance, puncture resistance, and relatively soft, excellent oxygen barrier, but poor barrier to water vapor, greater moisture absorption, moisture permeability, poor heat sealability, suitable for packaging hard goods, For example, greasy foods, meat products, fried foods, vacuum packaged foods, steamed foods, etc.

6. Cast polypropylene Thermoforming Film (CPP). Cast polypropylene Thermoforming Film is a polypropylene Thermoforming Film produced by a casting process. It can be divided into ordinary CPP and cooking grade CPP. It has excellent transparency, uniform thickness, and uniform vertical and horizontal performance. It is generally used for composite Thermoforming The inner layer material of Film.