There are so many different kinds of goods in our life, so the choice of packaging materials is different. Different product types have different requirements for packaging materials. This requires us to consider various situations and choose correctly. Packaging Materials. We generally choose according to the following aspects: 1, moisture resistance The product may be placed in a humid environment, but also need to consider the situation of the rainy season, so the packaging material has good moisture resistance, which can better protect the goods. Generally, the materials with good moisture resistance are: polyethylene, aluminum foil, aluminum plating. Membrane and the like. 2, good air tightness Good air tightness can prevent the gas in the packaging container from coming into contact with the outside, such as polyester, nylon, polyvinyl alcohol, etc.; however, some products need to be kept fresh, such as fruits and vegetables, it is necessary to select a film with poor air tightness. Such as polyethylene, polypropylene and other films. 3, mechanical strength Commodities have to go through different environments and have to be transported to various places. This requires high mechanical strength of the packaging materials to ensure that the products are not damaged in these processes, so we can choose the mechanical strength comparison of aluminum foil, polyester, nylon, etc. Large film. 4, transparency Transparency is only for products that need to be intuitively understood. When the transparency of the product is relatively high, the purchaser can directly observe the shape of the product through the naked eye at a glance, thereby promoting the sale of the product. Therefore, we can choose materials with higher transparency, such as cellophane, polyester, nylon and other films. 5, printability In general, the product packaging needs to be printed with the pattern and basic information of the product, so that not only can the product packaging be more beautiful, but also the sales can be improved. Therefore, we can choose materials such as polyester and biaxially oriented polypropylene. In addition to the above requirements, we also need to consider the heat resistance, cold resistance, fragrance retention of the packaging materials when selecting packaging materials. Article source address: http:// Familie doll has a blank face,you can draw eyes,lips,nose,eyebrows on the face and you can sew according to your drawing.You can also send us the picture of your drawing and we can sew for you.It likes a mystery box,you don't know what it is until you recieve Familie doll. New Toys,New Toy Doll,New Barbies Toy,New Doll Set Nantong Einsame Familie Toy Technology Co.,Ltd , https://www.einsamefamilie.com