Face Shield 防護面罩-Medtecs美德醫療

A face shield is a piece of personal protective equipment (PPE).  To provide optimal protection, they are designed to cover the full face (from the top of the head to the chin and covering the ears horizontally) and protect the wearer from viral spray particles.   Face shields are arguably best at protecting from coughs and sneezes. 

Face Shield

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Face Shield Structures

The manufacturing for face shields

There are two methods are used to manufacture face shields:

  1. Extrusion
  2. Injection molding.

Generally speaking, faceshields cut from extrusion sheets provide better impact resistance than injection molded faceshields 

Face Shield 防護面罩-Medtecs美德醫療
Common Materials For Face Shield

Face Shield Materials

There a 2 major materials for medical face shields

When it comes to selecting face shields, the most important consideration is the lens plate.  The quality of the lens plate ultimately reflects the clarity and impact resistance of the face shield.   Cheaper materials with poor clarity often result in dizziness and fatigue after a period of time.  Here are some common materials for face shields.

  • Polycarbonate (PC)
  • Glycol Modified Polyethylene Terephthalate (PETG)
  • Polyethylene Terephthalate (PET)
Face Shield for Industrial use
Face Shield 防護面罩-Medtecs美德醫療
Medtecs Face shield mini
Medtecs Face shield light

Face Shield Regulation & Standards

ANSI (American Standard)

  • Mark Z87: Basic impact: Faceshields shall be capable of resisting impact from a 25.4 mm (1 in) diameter steel ball dropped from a height of 127 cm (50 in).
  • Mark Z87+: High impact: Faceshields shall be capable of resisting impact from a 6.35 mm (0.25 in) diameter steel ball traveling at a velocity of 91.4 m/s (300)

EN 166 (European Standard)

These shields are for protection against high-speed particles and must withstand the impact of a 6 mm nominal diameter steel ball, striking the oculars and the lateral protection at the speed stated.

  • Mark A: 190 m/s.
  • Mark B: 120 m/s.
  • Mark F: 45 m/s.
  • ref. EN166

CSA (Canadian Standard)

Z94.3-15 Eye and Face Protectors Class 6 relates to face shields, and is divided into 3 sub-classes

  • 6A – Impact, piercing, splash, head, and glare protection.
  • 6B – Radiation protection. Also for low heat, splash, glare, and light non-piercing impact protection.
  • 6C – High-heat applications and light non-piercing impact protection only.
    ref. CSA Z94.3-15

Frequently Asked Questions

ASTM Standards

ASTM Standards & Protective Clothing

ASTM International is an international organization that sets standards for a wide range of products, materials, systems, or services that are used every day by people to do their jobs.  Let’s Look at the ASTM standards that are related to protective clothing.

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