The raw material PA / PE five-layer co-extruded nylon film used in the nylon vacuum bag is a high-barrier film with excellent performance manufactured from various single materials ( PA , PE ) through multi-layer co-extrusion equipment. advantage: Improve film quality and give special properties The five-layer co-extruded nylon vacuum bag has both the gas barrier properties of nylon film and the water vapor barrier properties of PE film, good heat sealability, high mechanical properties, excellent puncture resistance and low temperature resistance. Improve film post-processing performance Nylon vacuum bags have strong adaptability to heat-sealing bags and automatic packaging. Environmental protection, non-toxic The traditional high-barrier film produced by dry compounding requires adhesives and solvents, which are harmful to people and the atmosphere, but the high-barrier film produced by co-extrusion does not have this situation. application: Nylon vacuum bag is a very tough vacuum bag with good transparency, good gloss, high tensile strength and tensile strength, and good heat resistance, cold resistance, oil resistance and organic solvent resistance Resistance, abrasion resistance, puncture resistance, softness and oxygen barrier, but poor barrier to water vapor, high moisture absorption and moisture permeability, poor heat sealability, nylon vacuum bag is suitable for packaging Hard objects, such as greasy foods, meat products, fried foods, vacuum-packed foods, steamed foods, etc. Product Composition: The basic structure of the five-layer coextruded nylon membrane is PE / adhesive layer / PA / adhesive layer / PE . Due to the addition of nylon ( PA ), the barrier to oxygen, carbon dioxide, water vapor, and odor is greatly improved, thus playing a role Effect on the preservation and quality of products. PA film is divided into two types: printing grade and composite grade. The printing grade can be used for printing and composite processes. The composite grade is only recommended for composite processes that do not require printing. Thickness generally has several specifications of 12 μ m , 15 μ m , 25 μ m . When used for intermediate layer compounding, and when used for boiling and cooking, double-sided corona film must be used. The key quality requirements of PA film : a. If the flatness is high, the synchronous stretch film with small bow effect should be selected. b. The surface tension of the film is ≥ 50mN / m to ensure the fastness of ink adhesion. The processing value is not as large as possible. c. Choose a film with good relative humidity adaptability to ensure overprint accuracy. d. Choose the film type with small heat shrinkage rate (wet heat shrinkage rate). The difference with polyester vacuum bags: Polyester vacuum bag is made of polyethylene terephthalate as raw material, which is made into thick sheet by extrusion method, and then made by two-way stretching. It is a colorless, transparent and shiny vacuum bag with excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention Good performance, is one of the commonly used barrier composite vacuum bag substrate. However, the price of polyester vacuum bags is higher, and the general thickness is 12 μm . It is commonly used as the outer layer of cooking packaging, and the printability is better. Other Ribbed Manila Envelopes,Ribbed Skyline Kraft Envelope,Ribbed Skyline Manila Mailer,Pocket Ribbed Skyline Mailer Sun Kee Envelopes Limited , https://www.sunkeeenvelope.com
Features and applications of nylon vacuum bags