EMI Shielding Foil For MRI Shielding Room

EMI shielding foil is a flexible thin layer material specifically designed to absorb or reflect electromagnetic interference (EMI) and radio frequency interference (RFI). It plays a crucial role in protecting electronic device casings, cable sheaths, and sensitive circuits. Due to its high conductivity, the foil effectively reflects or absorbs external electromagnetic waves, preventing signal crosstalk and equipment failure, thereby ensuring stable system operation.

 

From a technical perspective, shielding copper foil is usually made by rolling or electrolysis, and the surface can be covered with polyester film or conductive adhesive layer to enhance adhesion and flexibility. Its shielding effectiveness is closely related to thickness, surface resistance, and bonding method, and can typically achieve attenuation levels of over 60dB in the frequency range of 30MHz to 10GHz.

 

 

Item		2oz	3oz	4oz	5oz	6oz
		(70um)	( 105um)	(140um)	(175um)	(210um)
Material		99.8% Pure Electrolytic (ED) Copper
Area Weight g/m2		585±25	915±45	1220±60	1525±75	1830±90
Tensile Strength kg/mm2	At Room Temperature	≥25.0
Elongationx %	At Room Temperature	≥5.0
Electrical Resistivity Ω·g/m2		≤0.162
Anti-Oxidization		No oxidation after 30 min at 160°C
Structure		Copper foil + conductive acrylic adhesive + release paper
Shelf Life		6 months (stored properly)
Width Available		1290mm	1320mm	1320mm	1370mm	1320mm

 

• 3 oz (0.105mm which mostly used) Thickness for MRI Room Compliance - Precisely engineered thickness meets MRI vendor shielding standards, offering optimal balance of conductivity and flexibility for medical imaging environments.
• 99.8% Pure ED Copper - High-purity electrolytic copper delivers superior electrical conductivity for maximum EMI/RFI shielding effectiveness.
• Minimizes Image Distortion - Prevents external RF noise from entering the MRI scanner, ensuring crystal‑clear diagnostic images and reducing the need for repeat scans.
• Lightweight & Easy to Install - Copper foil is lighter and more formable than steel or lead alternatives, allowing quick on‑site modifications to fit any room geometry.
• Versatile Application - Suitable for covering walls, ceilings, floors, and doors in MRI suites, as well as building Faraday cages for CT rooms and RF‑shielded test laboratories.
• Corrosion Resistant & Durable - Naturally corrosion‑resistant copper provides long‑term shielding performance without rust or degradation, maintaining effectiveness over the life of the facility.

 

 

Our ED Shielding Copper Foils with High Elongation and High Tensile Strength, can be used in many areas. We can provide the specific single-matte, double-matte, and double-shiny ED Copper for the Li-ion Battery. And we can also offer 2oz to 6oz ( nominal thickness 70um to 210um) Shielded ED Copper Foils used for shielding of electric products, especially as transformer, cable, mobile phone, computer, mechanical treatment, aerospace, and industry Applications . What is more, HTE (high temperature elongation) from 1/2oz to 2oz thickness copper foil and VLP-HTE-HF( very-low-profile, high temperature elongation, and heavy ED Copper Foils, used in PCB, which the max dimension is 1295mm x 2450mm.Below is the US customer Feedback pics for the Shielding Copper Foils used in MRI Room

 

 

Consumer Electronics

• Shielding for smartphones, tablets, laptops, and wearables.
• Protection for circuit boards and internal components.

Automotive

• EMI shielding for electric vehicles (EVs) and onboard electronics.
• Reducing interference in sensors and control systems.

Aerospace and Defense

• Shielding for avionics, radar systems, and communication equipment.

Medical Devices

• Ensuring the reliability of sensitive medical equipment, such as MRI machines and pacemakers.

Telecommunications

• Protecting network infrastructure and data transmission systems.

 

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In practical applications, selecting the appropriate EMI shielding foil requires comprehensive consideration of the following factors:

• Interference Characteristics: Identify the frequency range of the interference that needs to be shielded.
• Shielding Effectiveness: Determine the required SE value based on device requirements.
• Physical Constraints: Evaluate available space, need for flexibility, need for transparency, etc.
• Environmental Conditions: Consider operating temperature, humidity, presence of corrosive gases, etc.
• Cost and Manufacturing: Balance material cost, process complexity, and manufacturing yield.

 

 

• High-Quality Materials: We use premium-grade metals to ensure superior shielding performance.
• Customizable Solutions: Tailored thickness, size, and adhesive options to meet your specific needs.
• Technical Expertise: Our team provides expert guidance to help you select the right shielding solution.
• Fast Delivery: Reliable supply chain ensures timely delivery for your projects.
• Competitive Pricing: Cost-effective solutions without compromising on quality.

 

 

 

Q1: What is EMI shielding foil and how does it work?

A:EMI shielding foil is a functional thin material that blocks the propagation path of electromagnetic interference through both reflection and absorption. The operating principle is as follows: when electromagnetic waves strike the shielding foil, most energy is reflected by the highly conductive surface, while the remaining portion is absorbed and dissipated within the material. To achieve effective shielding performance, the shielding layer must form a complete Faraday cage and be connected to a stable ground path. EMI shielding foil is commonly available as tape with a self-adhesive layer and is widely used for protecting electronic device housings, cable sheaths, and sensitive circuits.

 

Q2: What are the main types of EMI shielding materials

A:EMI shielding materials are mainly Copper foiil, Aluminum foil,Conductive Fabric,Absorber (Ferrite).

 

Q3: What is the correct installation method for EMI shielding foil? 

A:Proper installation directly affects shielding effectiveness. Standard installation steps:Surface Preparation,Cutting and Positioning,Pressing and Air Removal,Overlap Splicing,Grounding.

 

Q4: Why is grounding so important for shielding foil? 

A:Grounding is critically important for shielding foil. Ungrounded shielding material cannot form a complete shielding circuit, allowing only reflection without effective blocking. Shielding effectiveness drops to zero, even for premium shielding products.

 

Q5:What are the consequences if there are bubbles or raised edges on the shielding foil?

A:Air bubbles and edge lifting significantly reduce shielding effectiveness and can cause localized shielding failure.

 

Q6: What are the main reasons for EMI shielding material failure?

Based on engineering practice, the top ten reasons for EMI shielding material failure are:Poor or missing grounding,Excessive gaps,Prioritizing shielding over thermal management,Wrong shielding principle for frequency,Poor installation,Ground lead too long or too thin,Temperature rating mismatch,Short‑circuit with components,Single material for broadband interference,Ignoring environmental reliability etc.

 

Q7: What is the shelf life and proper storage conditions for EMI shielding foil?

A:The typical shelf life of EMI shielding foil is 6 months from the date of manufacture, subject to proper storage conditions. Recommended storage conditions: temperature 10–35°C, relative humidity ≤70%.

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