Foam Materials
Gbogbo ọrọ náà
Foam materials are what graphic and product designers reach for when they need lightweight bulk: a rigid panel that is thick but barely weighs anything, or a block that can be carved into a smooth three-dimensional model in minutes. An exhibition sign mounted on foamboard, a presentation panel on an easel, a sculpted concept model of a new shampoo bottle, and the moulded packaging that cradles a television are all foam in action. Foam turns a small amount of solid polymer into a large, light, useful volume by trapping air inside it.
This note covers the graphic-products foam objectives: how foams are classified into open-cell and closed-cell, rigid and flexible; the stock forms (sheet, board, block) they are bought in; the properties of lightness, rigidity and easy shaping that make them useful; their environmental impact, which is the weak point of most foams; and the two named materials, foamboard and Styrofoam, with the modelling, mounting and packaging jobs each one does best.
Ebumnobi
- demonstrate knowledge of foam materials and understand their classification, stock forms, properties, environmental impact and uses
- demonstrate knowledge of the following foam materials: - foamboard - Styrofoam.
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Foam Materials. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- What gives foam materials their characteristic combination of thickness and very low weight? A. A dense solid polymer core B. Gas (air) trapped inside a network of thin walls C. A metal reinforcing mesh D. Layers of compressed paper Answer: B
- What is the structure of foamboard? A. A solid block of carvable foam B. A lightweight foam core bonded between two smooth paper or card faces C. Corrugated paper between two liners D. Layers of self-adhesive vinyl Answer: B
- Which foam material is most suitable for carving a smooth, curved three-dimensional presentation model? A. Foamboard B. Styrofoam (extruded polystyrene) C. Open-cell upholstery foam D. Corrugated board Answer: B
- Why are closed-cell foams preferred for protective packaging and rigid panels? A. They absorb water readily B. The sealed gas pockets resist water and help the foam hold its shape C. They are heavier than open-cell foams D. They biodegrade quickly Answer: B
- What is the main environmental drawback of polystyrene foam materials? A. They are made from renewable plant sources B. They are oil-based, persistent and difficult to recycle C. They cannot be cut or shaped D. They dissolve harmlessly in water Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Foam Materials? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
Dawunlodi Ẹpp naa lori Google Playstore.
Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
