Flexible packaging materials products

Flexible packaging materials products: 1, single layer film has a transparent, non-toxic, impermeability, good heat sealing bag making, heat cold resistance, mechanical strength, oil resistance, chemical resistance, prevent adhesion sex. 2, aluminum foil, 99. 5% purity of electrolytic aluminium melt by calender pressed into foil, RuanSu packaging substrate is very ideal. 3, vacuum steaming aluminum plating film under high vacuum degree, the low boiling point of the metal, such as aluminium, melting gasification and deposited on the plastic film on the cooling drum, forming a layer of aluminum plating film with good metallic luster. 4, silicon coating in the 1980 s development has a very high barrier performance of transparent packaging materials, also known as the ceramic coating. 5, glue ( Dry/wet) Composite membrane monolayer film has certain advantages, there are inherent shortcomings. Methods: wet composite film coating on a substrate with another base material paste composite film pressure, after then dry curing. If is a porous material, glue drying may be bad, the composite film quality is reduced. Dry type composite membrane method: on the base material coating and adhesive, and let the glue dry, then pressure compound, make different substrate membrane bond. 6 in a extrusion machine, extrusion coating composite film, thermoplastic through T mouth after mold flow delay in preparing a paper, foil, plastic substrate, or in extrusion resin as adhesive, middle place the other a film base material pressure to stick together, form a 'sandwich' type of composite membrane. 7, a total of extrusion ( 复合挤压) Composite membrane using two or three extrusion machine, Shared a compound die, in has the compatibility between several thermoplastic plastic laminated, produce multilayer film or sheet. 8, high barrier property of film under the condition of 23 ℃, RH65 %, the thickness of 25. 4 microns material, its oxygen through the amount in 5 ml/m2. D, the amount of moisture through the 2 g/m2. D below. 9, preservation and sterilization ethylene gas adsorption film, join in thin film materials such as zeolite, christobalite and silica, can absorb the fruits and vegetables exhaled ethylene gas, inhibit its mature too fast. Film condensation hair mist, more water within the green packaging film surface dewing fog, easy to make food mildew. Antibacterial film, join in plastic material which has the function of ion exchange synthetic zeolite ( SiO2+Al2O3） , add silver ions, inorganic filler, silver sodium ion exchange after become silver zeolite, its surface has antimicrobial properties. Far infrared ray preservation film, mixed in plastic film into the ceramic filling agent, make this film to produce far infrared function, in addition to can kill bacteria, and can activate cells of the shawl, so have the function of keeping fresh. 10, sterile packaging film is mainly used in food and medicine in the production of aseptic packaging, requires: sterilization resistant ability; High barrier property and strength; Good heat cold tolerance ( - 20 ℃ not brittle) ； Acupuncture resistance; good resistance to bending Printing design in high temperature sterilization or will not damage other sterilization methods. 11, resistance to high temperature cooking bags, in the 1960 s, the U. S. navy institute first develop applied to space food, after the Japanese quickly promote, development and application in all kinds of new type of convenience food. High temperature cooking bags can be divided into transparent type ( Shelf life) more than one year And opaque type ( More than 2 years shelf life) Type, high separation and regular. According to the sterilization temperature can be divided into low temperature cooking bags, 100℃，30min） , medium temperature cooking bags, 121℃,30分钟) , high temperature cooking bags, 135℃,30分钟) 。 Retort pouch lining materials in a variety of flow extending to blow (PE LDPE、HDPE、MPE） Film, high temperature resistant cast CPP or blowing IPP, etc. High temperature cooking bags main advantages: (1) high temperature cooking kills all bacteria and 121 ℃ / 30 min may kill all botulinum toxin; (2) may be retained for a long time under normal temperature, without refrigeration, cold also can warm food; (3) packaging materials with good barrier property, as canned; (4) can reverse printing, printing and packaging beautiful; (5) waste incineration. 12, high temperature resistant packing diaphragm material above 200 ℃, melting point for high strength of hard/soft container. 13, degradable plastic film degradation plastic products, according to the decomposition mechanism can be divided into light degradation, biodegradation, such as light and biological degradation. 14, heat shrinkable film after the 1960 s to get rapid development. Material is PP, PVC, LDPE, PER, nylon, etc. Squeeze film, first in the softening temperature ( Bo changes point) Below the melting temperature above a certain temperature, in the condition of high elasticity, using synchronous or two footwork flat die stretching method, or rolling method of stretching method, or solvent LiuYanFa directional tensile, tensile molecules are cooled to below vitreous locking.