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Flexible packaging design and technology

The direct effects of surface conditions, when the thickness of 7 ~ l5m, AL foil pinhole more moisture with good performance, but not high gas barrier; thickness of 15 ~ 2Om above, pinhole less, with good moisture resistance and resistance gas. Through the appropriate thickness of the composite, protected by the other substrate,[link widoczny dla zalogowanych], can play the whole of the barrier material and the strength and rigidity, is an economical choice. Vacuum aluminum is a dark substrate moisture economy. AL aluminum foil and vacuum packed for barrier-type non-transparent. (4) $ 10Xt hiding minimum thickness of the barrier coating is superior SiOX PVDC, EVAL, and almost free from the influence of temperature and humidity, resistant to cooking, good environmental properties, compared with AL foil, SiOX coating for transparent high-barrier packaging and microwave processing. SiOX coating technology further with the mature, stable product quality and performance further, to further reduce costs, some future challenges in the AL foil barrier packaging applications. SiOX Barrier coating for transparent packaging. Three composite materials (1) PE wife LDPE has a lower sealing temperature, heat sealing temperature range, room temperature packaging sealing layer. HDPE has a heat resistance, heat sealing temperature is higher than LDPE, used as a cooking bag sealing layer. LLDPE has a comprehensive performance such as strength and toughness, good sealing performance fouling inclusions. MPE has the sealing performance, from low temperature sealing, heat sealing, high strength, excellent sealing performance fouling inclusions. (2) CPP common type CPP: Copolymer CPP, heat sealing, good sealing temperature of from about 120 ~ C, for general packing heat sealing layer. Cooking Type CPP: from the closure temperature of about 140 (3) mining equipment from the flail dry ionic polymer (Ionomer) has excellent sealing properties,[link widoczny dla zalogowanych], heat sealing temperature range, from sealing temperature is low (about 80E), anti-pollution sealing ability of inclusion. (4) low-temperature high-speed low-temperature sealing material sealing shaking at lower temperatures can be reliable seal strength,[link widoczny dla zalogowanych], low temperature heat sealing by a sealing layer of resin is mainly determined by the performance. Of poor heat resistance or the overall heat-resistant drug packaging materials, poor, should be used in low temperature heat sealing materials, such as PVDC,[link widoczny dla zalogowanych], EVA and other PE modified material. Flexible composite technology composite materials mainly include: coating method, squeeze complex law, the legal level (dry compound, wet composite, hot melt compound), co-extrusion method. The formation of different composite manufacturing process of soft plastic composite materials have their own characteristics, the composite flexible packaging structure to a certain extent. Coating method: a more flexible material, the general lack of adequate stiffness, but the processing cost is low. Composite products such as paper / PE, OPp / PE, PT / PE and so on. Extrusion compounding; extrusion composite speed, low cost, substrate selection range, but the product less smooth. Composite products such as: paper / PE / AL / PE, KNY / EVA and so on. Dry Compound: Dry complex is to create high-end composite packaging materials, the main method, the formation of products of high quality, appearance of smooth, rigid, substrate choice is great, but the substrates are higher, and easy to form a solvent residues (solvent-free composite method can be improved.) Composite products such as OPP / CPP, PET / AL / PE, PA / CPP and so on. Wet Composite: Composite fast, low cost, environmental performance is good, but the request was at least one layer of sticky material is paper, fabric and other porous materials, thus the limited categories of composite materials. Composite products such as paper / PET, paper / AL, PT / PE and so on. Co-extruded composite: a step forming, low consumption and high performance materials, with few and thin materials can be prepared by high-performance materials, liquids, fats and good gas barrier properties, solvent-free, but the material properties of layers of more demanding high (such as temperature and rheology, etc.), products are often also a lack of rigidity. Composite products, such as LLDPE / HDPE / LLDPE, PE / NY / PE, LDPE / PP / LDPE, PP / LDPE / EVA, PE / EVOH / EVA and so on. __I ■ composite flexible packaging structure design is gradually set of requirements to achieve function, technology, cost,[link widoczny dla zalogowanych], environmental protection, safety, secondary processing in one of the systematic philosophy. System requirements for the packaging designer from the point of view to understand the product characteristics, packaging technology requirements, packaging material properties, characteristics of composite manufacturing processes based on the combination packaging cost requirements, to optimize the overall structural design of flexible packaging products. Designer should first clear the characteristics of the packaged product and the main packaging requirements, a clear shelf packaging and consumer groups, and to determine the form of packaging and packaging materials selection and design of the structure is reasonably practicable, the composition of the final proposed and developed printing, composite processing technology and the necessary into the bag, bag technology.

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