[Chinese Packaging Network News] Tea is a traditional drink that our people have been drinking for thousands of years. Now it has become one of the three non-alcoholic beverages that have become popular around the world. When you brewing a cup of tea, the color of the beautiful jasper, the fragrant fragrance of people, with a bitter taste, a variety of tea-shaped, make people pleasing. However, because tea contains a variety of chemical substances, poor protection can easily deteriorate. In order to maintain the artistic charm of the color and flavor of tea, the choice of packaging materials is of utmost importance. According to research by industry experts, blister packaging can effectively protect the quality of tea during its storage and use, and extend the shelf life of tea.
The choice of blister packaging materials is based on the stringent requirements of the tea on moisture resistance, oxygen protection, shading, and fragrance protection of the packaging. After comparison of various existing materials, experts believe that the vacuum aluminum coating high barrier PVC film can meet The above requirements. Aluminized high barrier film is a new type of high barrier membrane packaging material, the main advantages are absolute sensory inertness and very low odor material permeability, transparency, elongation, rigidity, toughness, tear strength and resistance to tearing The crack strength is very good, the oxygen transmission rate is very low, and the water vapor transmission rate is also very low. In addition, its printability and sealability are good.
BOPP/AI/PE composites can be used as the substrate material. The outer layer of the material is biaxially oriented polypropylene (BOPP). After stretching, the molecules are oriented. The transparency of the film, gloss and water resistance, water vapor transmission The rate and oxygen transmission rate is 50% or less lower than polypropylene, except that the LDPE density is 20%. However, the film's resistance to tearing is very low, as long as there is a small gap in the film, it is easy to tear it. The middle layer of material is aluminum foil. Aluminum foil has strong light-shielding properties and has high reflectivity to light and heat; it has good barrier properties, gas-impermeable body and water vapor, and has good protection. The disadvantage of aluminum foil is that it cannot be stressed, there is no heat seal, there are pinholes, and it is generally not used alone. The choice of compounding with other materials can completely solve this problem, and the advantages of its barrier properties can be better applied. The inner layer of the material is polyethylene, it is non-toxic and odorless, has a good heat sealability, and its heat sealability is currently unmatched by other plastics.
The middle packaging mainly plays a role of shading and bringing together the scattered small blister packs. It is only necessary to use ordinary paper-processing cartons to meet the requirements. The carton structure can be designed into different shapes according to aesthetic requirements. The size of the carton can be selected according to market needs, such as 200g, 100g, 50g, etc.