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» 粉体塗装の塗布工程

粉体塗装の塗布工程

1950
  • Erwin Gemmer
ポリマー技術における粉体塗装の産業機器への応用。.

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Powder コーティング is a dry finishing process where a 熱可塑性樹脂 または thermoset polymer powder is applied to a surface, typically electrostatically, and then cured under heat. The powder particles are charged, causing them to adhere to the grounded substrate. Heating melts the powder, allowing it to flow and form a continuous, durable, and high-quality finish, often superior to conventional paint.

The powder coating process involves three main steps: part preparation, powder application, and curing. Proper surface preparation is critical for adhesion and involves cleaning and often pre-treatment like phosphating or chromating. In the application stage, the most common method is electrostatic spray deposition (ESD). A spray gun imparts an electrostatic charge (typically negative) to the powder particles as they exit the nozzle. The object to be coated is electrically grounded, creating an electrostatic field that attracts the charged powder particles to its surface. This attraction is strong enough to hold the powder in place temporarily. The coated part is then moved into a curing oven. The heat melts the powder, causing it to flow together and chemically react to form a cross-linked polymer network. This process, known as curing, results in a hard, durable finish. A key advantage of powder coating is its environmental friendliness, as it emits near-zero volatile organic compounds (VOCs). Furthermore, any oversprayed powder can be collected and reused, making the process highly efficient with material usage rates often exceeding 95%. The resulting coating is generally thicker and more resistant to chipping, scratching, and fading than liquid paint.

UNESCO Nomenclature: 3319
– Polymer science and technology

タイプ

工業プロセス

混乱

実質的な

使用法

広く普及している

前駆物質

  • development of thermoplastic and thermoset polymers
  • understanding of electrostatics and triboelectric charging
  • invention of the spray gun
  • advances in industrial oven technology
  • fluidized-bed techniques for handling powders

アプリケーション

  • automotive parts and wheels
  • household appliances (e.g., refrigerators, washing machines)
  • architectural metalwork (e.g., window frames, facades)
  • bicycles and outdoor furniture
  • industrial equipment and machinery

特許:

  • DE933019

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Related to: powder coating, electrostatic, curing, thermoset, polymer, VOC-free, finishing, industrial coating, durable, surface treatment.

歴史的背景

粉体塗装の塗布工程

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(日付が不明または関連性がない場合、例えば「流体力学」などでは、その注目すべき出現時期の概算値が提示されます。)

関連する発明、革新、および技術原理

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