Composites (Graphic products option)
Bayani Gaba-gaba
A composite is what you get when two different materials are combined so that the result outperforms either one on its own. In graphic products this is everywhere: a foil-lined juice carton, a laminated menu, a chipboard shelf and a particleboard display unit all marry materials to gain a property a single material could not provide. The drinks carton borrows paper for stiffness and printing, plastic for sealing and a wafer of aluminium foil for a perfect barrier against light and air. None of them alone would keep juice fresh on a shelf.
This note covers the graphic-products composites objectives: what a composite is and how it is classified by the way its parts are combined; the properties that make composites so useful, such as barrier performance, strength-to-weight and rigidity; the environmental impact, which is dominated by the difficulty of separating bonded layers for recycling; and the two named families, foil-based composites and particle-based composites, with the everyday products each one makes possible.
Manufura
- demonstrate knowledge of composite materials and understand their classification, properties, environmental impact and uses
- demonstrate knowledge of the following composite materials: - foil based composites - particle based composites.
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Nazarin Darasi
Barka da kammala darasi akan Composites (Graphic products option). Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- What is a composite material? A. A single material used on its own B. Two or more materials combined so the result has better properties than either alone C. A material that has been recycled D. A pure metal foil Answer: B
- In a foil-based composite carton, what is the main job of the thin aluminium layer? A. To make the carton rigid B. To provide a printable branding surface C. To act as a barrier against light, oxygen, moisture and aroma D. To make the carton heat-sealable Answer: C
- Which of the following is a particle-based composite? A. Aluminium foil B. Chipboard (particleboard) C. Acrylic sheet D. Tracing paper Answer: B
- Why is MDF often chosen for painted display signage and cut letters? A. It has a strong visible wood grain B. It has smooth, grain-free faces and edges that machine cleanly and take paint well C. It is a foil-based composite D. It is fully transparent Answer: B
- Why is most foil-and-plastic composite packaging difficult to recycle? A. The materials biodegrade too quickly B. The bonded layers of different materials cannot easily be separated C. It contains no plastic D. It is too valuable to recycle Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
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