In order to meet the required packaging requirements, the composite packaging film should have the following properties: A. Mechanical properties: tensile strength, rigidity, wear resistance, sealing, elongation, friction, etc. B. Physical and chemical properties: moisture and oxygen barrier properties, fragrance retention, oil resistance, chemical resistance, light protection, etc. C. Durability: performance under low temperature and high temperature, stability under high humidity conditions, degradability, etc. D. Workability: suitable for printing, convenient for automatic packaging, anti-static, heat shrinking ability, etc. E. Commodity display: transparency, whiteness, glossiness, easy opening, easy disposal of waste, etc.  For various products, the requirements for composite packaging film packaging are different, as follows: A. The packaging of general industrial products mainly considers its protection, packaging workability, sales commodity, transportation, etc. B. Most of the packaging of daily chemical products directly faces consumers, and their protection, beauty, convenience, shelf display, etc. need to be considered. C. For the packaging of mechanical parts, its protection, functionality, rust resistance, transportation, etc. must be considered. D. For electronic product packaging, protection, shock resistance, antistatic property, shielding property, barrier property, etc. should be considered. E. For food and medicine packaging, consideration should be given to its protection, sanitation and safety, barrier properties, and packaging methods.  1. The role and requirements of the outer substrate (surface layer) Claim effect Mechanical strength Tensile resistance, tear resistance, impact resistance, friction resistance Barrier Moisture resistance, gas barrier, fragrance retention, UV protection stability Light resistance, oil resistance, organic resistance, heat resistance, cold resistance Workability Friction, heat shrink curl Health and safety Low taste, low odor, non-toxic other Gloss, transparency, whiteness, printability  2. Requirements and functions of intermediate layer materials Claim effect Mechanical strength Tensile, tensile, tear, impact Barrier Barrier, gas barrier, fragrance preservation Workability Double-sided composite strength other Transparent, protected from light  3. Requirements and functions of inner sealing layer Claim effect Mechanical strength Tensile, tensile, tear, impact Barrier Fragrance retention, low absorption stability Light resistance, oil resistance, organic resistance, heat resistance, cold resistance Workability Coefficient of friction, thermal viscosity, resistance to sealing contamination, non-crimping Health and safety Low taste, low odor, non-toxic other Transparency, non-transparency, impermeability, easy to tear  Like the purple sand pot, the bonsai pot is made of a kind of high-quality pottery clay that is a specialty of Yixing (hidden deep under the rock and mixed in the mud, so it is called "rock in the rock" or "mud in mud". The texture is delicate and flexible. Strong plasticity), after being selected, refined and refined, it is fired at a high temperature of 1000-1250 degrees. It has no glaze on the inside and outside, and has fine texture, toughness, good physical properties, and drainage and air permeability are very suitable for the growth of trees and flowers. Its color is ancient and quiet, its shape is generous and diverse and complements the potted flowers and trees. It is simple, rich and rich in ethnic characteristics. In addition, it is meticulous and exquisite. It can be said that it has both artistic value and practical value, which is unmatched by other types of pots. Bonsai Pot, Large Bonsai Pots, Small Bonsai Pots, Clay Bonsai Pots, Best Bonsai Pots Wuxi Shute Ceramic Products Co., Ltd. , https://www.stflowerpot.com
The beauty of the large bonsai pots lies in its unique decorative means. Skilled craftsmen of the past dynasties, through their own exquisite skills, integrated the pot color, shape, style recognition, inscription, calligraphy and sculpture, etc., so that the purple sand flowerpots can be beautiful in the simplicity and give people a visual enjoyment.
The colors of the small bonsai pots are colorful. Among them, the three colors of vermilion, purple and beige are the main colors; during the firing process, as the temperature after entering the kiln is different, the depth and intensity of the color changes more and more; coupled with the accumulation of long-term practical experience of the artists, they use different proportions of mud With the preparation of materials, there are dozens of colors after firing. For example, the colors are named iron blue, sky blue, maroon, begonia red, cinnabar purple, water green, agarwood, sunflower yellow, cold golden color, pear skin, blue gray, dark green, patina, brown black, durian skin and other colors. If you observe carefully, there is a little bit of white sand in the mud, with silver light flashing, and some of the mud is mixed with coarse mud sand or steel sand, and the particles are looming and extremely eye-catching. Although the color changes in the purple sand are many, the tones are very calm. If you plant ancient piles of pine and cypress, it will be more simple and simple.
The shapes of the clay bonsai pots range from very deep thousand-tube basins to very shallow basins, from round basins with a diameter of about one meter to finger-sized miniature basins. There are all kinds of specifications, various forms of basin mouth, basin surface, basin hole The changes in the feet of the basin are even more varied, which is even better than the shape of the purple clay pot. It can be described as a masterpiece of the shape of the vessel.
Composite packaging film performance and packaging requirements