Changsha powder aluminum foil vacuum bag Main products: aluminum foil bag, vacuum bag, 12 bags, board vacuum bags, food and cooking vacuum bag, nylon vacuum bag, anti-static metal bags and other packaging materials. Vacuum known as polyamide 66 (polyamide 66) or nylon 66 (nylon 66). Yellowish translucent or milky white opaque resin. The relative density of 1.14 to 1.15, melting point 259 ~ 267 ℃. Abrasion resistance, oil resistance, excellent self-lubricating property, heat resistance, strength, rigidity is the highest in the aliphatic nylon species. Tensile strength 75.9 ~ 82.9MPa, the compressive strength of 91MPa, Izod impact strength (notched) 4kJ / m, the thermal deformation temperature (1.82MPa) 75 ℃, the hardness of R120, the volume resistivity of 1015Ω? Cm, the dielectric strength of 35kV / mm, self-extinguishing. From adipic acid and hexamethylene diamine condensation reaction. Can be extrusion, injection molding, blow molding and other methods. Can be enhanced filling, alloying modification. Widely used as fibers, tire pressure, also known as curtain vacuum packaging, is based on the principle of atmospheric pressure, the main role of the vacuum bag is oxygen, in order to help prevent food spoilage or deterioration. Vacuum packaging is the packaging bag of food and oxygen within the cell by pumping deprived, so that microbial processes in the loss of "living environment". Vacuum bag can prevent food oxidation, so the food does not taste, deterioration to reduce the loss of vitamins A and C. Vacuum packing materials commonly used three-layer composite film or aluminum foil composite film made of three sealed bags. Vacuum packing machines commonly used cavity and outside pumping two kinds of models. Our vacuum packaging technology was developed in the early 1980s, while filling the vacuum packaging technology started in the early nineties. Vacuum packing materials commonly used three-layer composite film or aluminum foil composite film made of three sealed bags. Vacuum packing machines commonly used cavity and outside pumping two kinds of models. Our vacuum packaging technology was developed in the early 1980s, while filling the vacuum packaging technology started in the early nineties.