In cosmetics, bottle caps and caps are the main uses. P […]
In cosmetics, bottle caps and caps are the main uses.
Plastic technology: There are five main methods for converting plastic resin into packaging components.
2. Extrusion blow molding,
3. Compression molding
4, thermoforming and
5. Injection blow molding
With the development of the cosmetics industry, various packaging forms and types are rapidly emerging.
Although rigid packaging such as tin boxes and glass bottles tend to occupy specific market segments, flexible packaging can be adapted to almost all market segments.
Solids, liquids, ointments and powders can be packaged as flexible units. The three basic structural components of flexible packaging are paper, plastic film (cellulose acetate, polyethylene, PVC, PP) and metal foil. Single-layer packaging will be made from only one of these substrates. More complex structures are made from multilayer lamination. Adhesives and hot melt adhesives are used to bond the plies together. Decorative and functional coatings can be applied to both outer and inner surfaces.
Various requirements for cosmetic and toiletry packaging (such as aesthetic appearance; impermeability to water and volatile oils) are not always available from a single material.
This problem can sometimes be solved by using layered composite materials.
Laminates have found special applications in the production of pouches and foldable tubes and can replace pure metal tubes for toothpaste. Laminates are used for flat sachets that are heat sealed around.
Laminates for foldable tubes are designed to combine the appearance of plastic with the impermeability and foldability of aluminum.
Aluminum foil provides the best barrier properties even in the thinnest specifications.
The use of plastics to produce major components and point-of-sale materials has now become the dominant technology for packaging.
Two main groups are used-thermoplastic resin and thermosetting resin
The thermoplastic resin can be extruded at its melting temperature and then blow-molded or injection-molded. After cooling, the resin can be remelted by heating to thermal fatigue and oxidation limits.
Polyvinyl chloride (PVC), low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene and polystyrene are thermoplastic.
Thermoset resins are molded using irreversible chemical reactions, and resins tend to be rigid, hard, insoluble and not affected by heating to decomposition temperature
The general term "amino plastic" is used for plastics made by reacting formaldehyde with amino compounds. Their applications include electrical equipment such as switchboards, sockets or circuit breakers, work surface laminates, and more. Compression molding
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