Blister packaging is the general term for plastic products produced by the plastic blister process and packaged with corresponding equipment. Products include: blister, tray, plastic boxes, synonym: vacuum cover, blisters and so on.

Blister packaging materials and features

A PVC sheet has high toughness, is not easy to burn, generates chlorine when it is burned, and has certain impact on the environment. PVC is easy to heat and can be sealed by a sealer and high frequency, which is the main raw material for producing transparent plastic products. PVC sheet is a widely used and popular material, PVC film can be divided into two kinds of environmental protection and environmental protection, can be made of transparent, colored, anti-static, gold-plated, flocking and other various plastic packaging products, Features Mainly high transparency, good surface gloss, less crystal point, small water mark, wide use, strong impact resistance, and easy molding, the products are widely used in toys, food, electronic products, medicine, electrical appliances, gifts, cosmetics, stationery, etc. Product packaging.

Second, the FS hard film has low density, poor toughness, and is easy to burn. When it is burned, it will produce styrene gas (which is a harmful gas), so it is generally used to produce various industrial plastic trays. PS sheet is a new type of environmental protection packaging material developed in recent years. With its excellent thermoforming performance, good environmental performance and sanitary performance, it is widely used in medicine, food, toys and electronics.

Three PET hard sheets have good toughness and are new materials developed in recent years. With its excellent toughness, high strength, high transparency, and renewable recycling, easy to burn, no harmful gases when burning, it belongs to environmental protection materials and gradually banned PVC, but the price is high. It is suitable for high-grade plastic products. The blister blister of European and American countries generally requires the use of PET material, but its high thermal melting point makes it difficult for high-frequency packaging.

IV PETG material is to solve the problem of high thermal melting point of PET material. People laminate a layer of PVC film on the surface of PET, named PETG, but the price is higher. Mainly used for electronics, food, toys, box window, collar care, footwear packaging.

Its advantages are as follows:

1, has excellent transparency and finish, showing good results.

2, excellent surface decoration performance, can be printed without surface treatment, easy to suppress the pattern, easy metal processing (vacuum plating metal layer)

3, has a good mechanical strength.

4. Good barrier properties against oxygen and water vapor.

5, good chemical resistance, can withstand the erosion of a variety of chemical substances.

6, non-toxic, reliable health performance, can be used to food, medicine and medical equipment packaging, and can sterilize its packaged items by Y-ray [span].

7. The adaptability to environmental protection is good, and it can be recycled economically and conveniently; when it is burned, no harmful substances harmful to the environment are produced. This type of sheet is considered to be an ideal packaging material that meets (ROSH) environmental protection requirements.

PP sheet is made of polypropylene resin as the main raw material, and added with various masterbatch, toughening agent and brightening agent. It is made through mixing, plastic extrusion, three-roll calendering, cooling, traction and winding. . PP sheet has the characteristics of non-toxic, odorless, sanitary, high mechanical strength and good barrier properties, and can be used for packaging in industries such as industry, agriculture and fruits. The surface of the tray box made of PP anti-slip sheet is smooth and beautiful, and it is welcomed by users. PP sheet is also suitable for packaging of high cold-resistant frozen foods, such as ice cream boxes, dumpling boxes, dumpling boxes, etc.

PP blister has: environmental protection, aesthetics, screen printing, Ke Yin, bronzing, high temperature resistance, low temperature resistance, high transparency, flex resistance, product compliance with food testing standards (can also be unnecessary), microwaveable.

Disadvantages of PP: low dimensional accuracy, lack of rigidity, poor weatherability, easy to produce "copper damage", it has a phenomenon of post-shrinkage, after demoulding, easy to aging, brittle, easily deformed.

Blister packaging production process

1: mold making and processing: according to the requirements or sample specifications, first make a good plastic mold, under general conditions, are using plaster to make plastic packaging mold, but also useful for wood carving and metal engraving products for mold, plaster mold made well After that, allow it to dry completely or dry, and then use the 1-2 mm drill to drill many small holes in the low-concave position that will not affect the appearance of the product according to the specific conditions of the surface of the product. If it is a product like a box , Drilled holes in the periphery to allow the air to be pumped out during the production of the plastic mold. After the mold has drilled the holes, the plaster molds have to be hardened. The hardened method is to use the thick alum saturated liquid to soak. After drying.

2: After the mold is completely dried, the mold is placed on the upper iron plate of the vacuum chamber. Then, according to the size of the mold, the plastic sheet is loaded into a suitable size, and then the sheet is placed in a heating wood cabinet to completely fix it. Then, the wood cabinet is softened with the plastic sheet set on a constant temperature furnace.

3: The softened and processed plastic piece is placed in a vacuum chamber together with a wooden cabinet. The suction switch is actuated, and the vacuum indoor air is suctioned and cleaned. After the plastic piece is cooled, the same concave package or process mold is obtained.

4: Blister packaging and finishing; the products will be trimmed and finished as finished products, which can be sold after packaging.

Blister packaging offer

Unit price of plastic blister = product material cost + energy consumption + labor and transportation + profit

Energy consumption: Blister is processed by heat, and the power consumption is relatively large compared to other industries, which is roughly 8% of the cost of the product. Labor: Blister is mainly produced by machines, and labor is less, which is roughly 10% of the cost of product materials. : Based on the customer's distance from the factory, Profit: The net profit of the plastic factory is generally very low, 12%-20%, depending on the payment period, and the 30-day checkout is 14% Material Cost: Calculation of product material cost Complex, before calculating the first to find out the following aspects of data:

Raw material price: According to the use of the product, determine which material and grade of material to use, find the lowest price of the kind of material supplier film thickness: pre-cut the product must be made of thick film, according to the molding of the thickness and shape of various parts The number of typesetting: According to the size and shape of the product, how many moulds can be arranged in one version will be calculated. The density will reduce the product quality, and the thinning will increase the material loss, which will increase the cost of material loss: the main factor is the product shape. , the number of products and the fit of the external dimensions with the chassis of the plastic machine, the more square the shape, the greater the output, the smaller the loss rate

Material cost calculation formula

Product material cost = 1 ton raw material price / 1 ton raw material finished product quantity

1 ton of raw material finished product quantity = 1 ton material length / (plastic template length + 4cm to 15cm tensile edge) X layout number X (100% - material loss rate)

1 ton of raw material length = 1 ton / material density / film thickness / width (blister chassis width)

The material density (PVC 1.36T/M3), blister chassis width (0.51-1.20M), template length and other four parameters are all estimated by professional experience.