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Сэндвич-панель из пенополистирола (EPS)

EPS Sandwich Panels combine an Expanded Polystyrene (EPS) core with metal facings for temperature-controlled construction applications. The EPS core forms by steaming and fusing expandable polystyrene beads, which trap air in closed cells to provide lightweight thermal insulation. Metal cladding options include pre-painted galvanized steel, stainless steel, or aluminum in RAL colors.

EPS is the most economical core option among insulation panels, offering a favorable balance of low weight, adequate thermal resistance, and easy workability. Its closed-cell bead structure resists moisture ingress and inhibits fungal growth, making it suitable for cold storage and food-processing environments where hygiene matters.

Interlocking connection systems create airtight seals between panels through tongue-and-groove profiles or cam-lock mechanisms. Installation accommodates vertical or horizontal orientation with modular assembly that reduces labor time. Panels connect by fitting together and securing with fastening systems like Allen key-operated cam locks.

Primary applications include walls, ceilings, and partitions in cold rooms, freezers, food processing facilities, and pharmaceutical storage. The panels support temperatures from refrigerated to freezing conditions while meeting hygiene standards for food safety. Surface materials resist oils, chemicals, and solvents, inhibiting bacterial growth in sensitive environments.

Global EPS Sandwich Panel Wholesaler

As the industry leading insulated panel manufacturer, RaxPanel provides EPS Sandwich Panels built with high-quality insulation materials to ensure optimal thermal efficiency, durability, and long-lasting performance.

Our panels feature robust construction with:

Corrosion-resistant steel sheets
Expanded polystyrene core for superior thermal performance
Interlocking tongue-and-groove systems that act as a thermal break to reduce energy consumption

With over 20 years of experience based in Hebei, China, we leverage our expertise to deliver custom composite panel solutions that meet international standards including CE, FM, and FDA, backed by warranties from 1 to 5 years.

Serving clients worldwide, we ensure reliable and personalized support for your specific project needs.

Get High-Quality EPS Sandwich Panels From RaxPanel Today!

Parameter	Value
Core Material	Expanded Polystyrene (EPS)
Standard Thickness	50mm, 75mm, 100mm, 120mm, 150mm, 200mm
Standard Panel Width	1120mm
Thermal Conductivity (Lambda λ-value)	0.038 W/mK
Panel Density	12 – 20 kg/m³
Surface Material Options	Pre-painted galvanized steel, Stainless steel, Aluminum
Color Options	According to RAL chart
Compressive Strength	≥ 100 kPa
Fire Resistance	Class B1 (FR-grade only; unmodified EPS is Class E)
Joint System	Tongue-and-groove interlocking connection system
Installation	Cam-lock or plug-in mechanisms for modular assembly
Application Temperature Range	Refrigerated conditions above freezing to freezer applications
Key Applications	Cold rooms, freezer rooms, food processing plants, distribution warehouses, pharmaceutical storage, horticulture rooms

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EPS Sandwich Panel Engineering Guide

Pro Tip: EPS Density Affects Both Insulation and Cost
Standard EPS core density ranges from 12 to 20 kg/m³. Higher density (16-18 kg/m³) improves compressive strength to 100-150 kPa and reduces thermal conductivity to 0.033 W/m-K. For cold room walls where panels must support shelving and hanging loads, 16 kg/m³ EPS is recommended over the cheaper 12 kg/m³ grade.

1. How EPS Core Compares to PUR and PIR

EPS (Expanded Polystyrene) is a closed-cell foam formed by expanding polystyrene beads with steam. While it does not match the thermal efficiency of PUR or PIR, it offers the lowest cost per square meter among all insulated panel core materials. For projects where moderate temperature control is sufficient and budget is the primary driver, EPS panels deliver reliable insulation performance.

Property	EPS	PUR	PIR
Density	12 – 20 kg/m³	35 – 45 kg/m³	40 – 45 kg/m³
Thermal Conductivity	0.033 – 0.038 W/m-K	0.022 – 0.024 W/m-K	0.021 – 0.023 W/m-K
Cost Level	Lowest	Medium	Higher
Best For	Cool rooms, warehouses, partitions	Standard freezers	Deep freezers, strict fire codes

2. Panel Thickness Selection Guide

Selecting the right thickness depends on the temperature differential between the interior and exterior, door traffic frequency, and energy efficiency targets:

Application	Internal Temp	Recommended Thickness
Partition walls, dry storage	Ambient	50 – 75 mm
Cool room (vegetables, dairy)	+2 to +10 C	75 – 100 mm
Chiller room	-2 to +2 C	100 – 120 mm
Light freezer storage	-10 to -2 C	150 – 200 mm

3. Cladding and Surface Options

Cladding Selection by Environment:

Pre-painted galvanized steel (PPGI): Standard for cool rooms, distribution warehouses, and partition walls. Available in RAL colors with polyester coating.
Stainless steel 304: Food processing areas requiring washdown-resistant, non-corroding surfaces that meet USDA and EC hygiene regulations.
Aluminum: Lightweight alternative for portable cold rooms and modular structures where weight reduction is a priority.

4. Joint Systems and Installation

EPS panels use tongue-and-groove interlocking edges that align and compress during assembly. For cold room applications, cam-lock fasteners (engaged with an Allen key) pull adjacent panels together and compress the gasket for an airtight vapor seal. For simpler partition wall applications, panels slide together via plug-in tongue-and-groove joints without cam-locks. All joints should receive a continuous bead of food-grade silicone sealant before engagement to prevent air infiltration and moisture migration.

5. Where Are EPS Sandwich Panels Most Commonly Used?

Cold Rooms and Cool Storage

Walk-in coolers for supermarkets, restaurants, and agricultural produce storage operating above freezing.

Food Processing Facilities

Hygiene-regulated production areas with stainless steel cladding and washdown-resistant wall surfaces.

Warehouse and Logistics

Temperature-controlled distribution centers, pharma storage, and horticulture rooms requiring cost-effective insulation.

Modular Partitions

Interior partition walls, clean room envelopes, and modular building structures where lightweight panels speed installation.

Frequently Asked Questions

1. How does EPS compare to PUR/PIR for cold room insulation?

EPS has thermal conductivity of 0.033-0.038 W/m-K, compared to 0.022-0.024 W/m-K for PUR/PIR. This means EPS requires greater thickness to achieve the same insulation value. However, EPS costs 30-40% less per square meter, making it the economical choice for cool rooms operating above freezing where extreme thermal efficiency is not critical.

2. Can EPS panels be used in freezer rooms?

EPS panels can be used for light freezer applications (-10 C and above) when specified at 150-200 mm thickness. For deep freezers (-20 C to -40 C), PUR or PIR core panels are strongly recommended because their superior lambda values prevent excessive heat gain through thinner walls.

3. What is the standard panel width and available lengths?

Standard effective width is 1120 mm after joint overlap. Custom lengths are available up to 12 meters for container shipping. For cold room heights exceeding 4 meters, panels can be joined horizontally with matching surface profiles.

4. When should I choose stainless steel cladding over PPGI?

SS304 cladding is required in food processing areas subject to daily washdown, in meat and dairy handling zones, and where USDA or EC hygiene regulations mandate non-corroding, bacteria-resistant surfaces. PPGI is adequate for dry storage coolers, partition walls, and general cold rooms without washdown requirements.

5. What joint system should I use for EPS cold room panels?

For cold room applications, tongue-and-groove edges with cam-lock fasteners (Allen key operated) provide the most reliable airtight seal. For partition walls at ambient temperature, simpler plug-in tongue-and-groove joints without cam-locks are sufficient. Always apply food-grade silicone sealant in the groove before engaging the joint.

6. What is the fire rating of EPS sandwich panels?

Standard EPS core achieves B2 classification (normal flammability) per EN 13501-1. Flame-retardant modified EPS reaches B1 (self-extinguishing, does not sustain combustion after flame removal). For facilities with strict fire codes, PIR or rockwool core panels offer superior fire performance.

7. How long do EPS sandwich panels last?

EPS is a stable closed-cell material that does not degrade, sag, or settle over time. With proper installation and sealant maintenance, panel lifespan typically ranges from 15 to 20 years. The steel cladding coating (PE, PVDF) is the primary factor determining surface durability, with PVDF coatings lasting 20+ years in normal environments.