橡膠硬度計 相關
廣告硬度計、酸鹼度計、黏度計等各式品管檢驗儀器,歡迎洽詢。
日本TECLOCK:GS-702N、GS-706N、GS-709N、GS-744G。美國Phase II:PHT-960、PHT-980。 橡膠硬度計 A型:檢測軟質橡膠材質硬度。D型:檢測硬質塑膠材質硬度。
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The Janka hardness test ( English: / ˈdʒæŋkə /; [1] German: [ˈjaŋka] ), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear. [citation needed] It measures the force required to embed an 11.28-millimeter-diameter ( 716 in) steel ball halfway into a ...
SpeciesForce: Pounds-force (newtons)5,060 lbf (22,500 N)Schinopsis brasiliensis, Quebracho, ...4,800 lbf (21,000 N)Schinopsis balansae, Quebracho Colorado, ...4,570 lbf (20,300 N)Lignum vitae, Guayacan, Pockholz4,500 lbf (20,000 N)Polyethylene terephthalate (or poly (ethylene terephthalate), PET, PETE, or the obsolete PETP or PET-P ), is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, and thermoforming for manufacturing, and in combination with glass fibre for engineering resins. [5]
- (C₁₀H₈O₄)ₙ
- 10–50 kg/mol, varies
- > 250 °C (482 °F; 523 K) 260 °C
- Practically insoluble
Polytetrafluoroethylene is a fluorocarbon solid, as it is a high- molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine.
Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly ...
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz.[5][6] In many parts of the world, silica is the major constituent of sand. Silica is abundant as it comprises several minerals and synthetic products. All forms are white or colorless, although impure samples can be ...
Mexico,[a][b] officially the United Mexican States,[c] is a country in the southern portion of North America. It covers 1,972,550 km2 (761,610 sq mi),[11] making it the world's 13th-largest country by area; with a population of almost 130 million, it is the 10th-most-populous country and the most populous Spanish-speaking country.[12] Mexico ...