Gold Member Since 2007
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Hangzhou Santiway International Co., Ltd.

Insulated Panels, Polyurethane Panels, Insulated Sandwich Metal Panel manufacturer / supplier in China, offering Steel Structure Roof Sandwich Panel, Color Coated Zinc Steel Coil (SC-001), Color Coated Steel Coil (SC-002) and so on.

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Supplier Homepage Product Steel Roof Sheet Steel Structure Roof Sandwich Panel

Steel Structure Roof Sandwich Panel

FOB Price: US $13.5-25 / Square Meter
Min. Order: 1,000 Square Meters
Min. Order FOB Price
1,000 Square Meters US $13.5-25/ Square Meter
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Port: Ningbo, China
Production Capacity: 8000 Square Meters Per Month
Payment Terms: L/C, T/T, D/P

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Basic Info
  • Model NO.: STW
  • Foam Thickness: 30-150mm
  • Steel Grade: Dx51d/SGCC
  • Core Material: Polyurethane/PU, or Polystyrene/EPS
  • Zinc Coating: 40-275G/M2
  • Surface Finish: Polyester
  • Transport Package: Load Into The Container Directly, Normaly 40′hq
  • Origin: Zhejiang, China
  • Thickness: 0.35-0.6mm
  • Width: 950mm
  • Base Material: Hot Dipped Galvanized or Galvanneal
  • Lacquer: Top Side 15-25 Um, Back Side 5um
  • Color: Ral Code
  • Trademark: santiway
  • Specification: Chinese GB standard
  • HS Code: 730890000
Product Description
Polyurethane VS. EPS (Expanded polystyrene)

Polyurethane is a relatively new product, roughly around 15 years. EPS has been with us for around 25 years. Polyurethane was produced to replace the shortfalls of expanded polystyrene. Below you will see a detailed difference between polyurethane, and expanded polystyrene.

R- Value
Polyurethane is highest rated insulation in the world. You will find it in most all of your refrigerators, freezers, and even in your personal carry out coolers. Per inch of insulation it has no equal. The walk in coolers and freezers for use thought the country are made of polyurethane. EPS has a value of R-2 to R-5 per inch. Polyurethane has an R- 7 to R-8 per inch.

Manufacturing
Probably the biggest difference between polyurethane and EPS is in the manufacturing of these panels. Both products use OSB for covering both sides of their foam, but here is where the similarity ends. In the bonding of the foam the actual polyurethane is used as bonding agent to the OSB itself. Polyurethane is one of the best glues used in the industry today. Some manufactures of OSB and plywood use polyurethane gives both an excellent R value and the strongest bond in the industry. EPS panels use glue spread on both sides of OSB, and then the OSB is matched together with the EPS, and mechanically held in place and under pressure until the glue is dried.

Moisture resistance
With all the problems of mold and mildew, moisture resistance is today a very important factor. Polyurethane has one of lowest moisture permeability ratings of any product manufactured for the building industry today. The permeane rating on polyurethane is 1.2. The permeance rating on EPS is 2.0 to 5.0

This difference in a high humidity area would warran another moisture barrier for EPS panels. In calculating R- values, some EPS manufactures use these additional moisture barriers in there calculations.

Fire resistance
The polyurethane is a UL class 1 rated foam. This means that polyurethane is not a source for fire. On its'own, polyurethane will not burn. When left on it's own, it will extinguish it self. A Class 1 rating is the highest rating a building product can obtain. Also, polyurethane is a thermal -set plastic. THIS means, that it will not melt. Polyurethane is not affected until temperatures reach 120 degrees and at that time it will only char. EPS on the other hand is not a thermal -set plastic and will begin to soften at termperatures of 70 degree.
Polyurethane has a distinct advantage.

Density
The density of a product will determine the strength of it. EPS has a density of 1lb. The polyurethane has a density of 2.2lb.

Chemical restance
Polyurethane is resistant to most counter chemicals. EPS react violently to petroleum based products. PL 400 and liquid nail will literally burn thru EPS.

From our experience, we feel that the investment made equals the quality of product made. We believe that there is no comparison between polyurethane panels and EPS.
MOQ for roof metalDX51D/SGCC/SGCH
What is the substrate for steel tiles?hot dipped galvanized or gavalumed pre-painted galvanized
What is the thickness     0.35-0.70mm, depends on customer
What colors are available?RAL Code  not only RAL, we can provide the color according to customer' s sample
What is the normal color and most economical color?Ocean blue and off white
What lengths can you offer?ecommand to fit for the container length, within 5.7m
What different between PVDF and PEPVDF is the most advanced painting in   construction industry, it is with high corrosion resistance and color   retention, and the life time could last to 20-25 years. Currently, PE is the   most widely-used painting in the color coated steel coils. It is characterized    by good overall performance, and high economic as well.
Can you provide the high strength roof sheet?  Yes, G550, with its yield strength over 550  mpa
What containers do you choose usually? 20feet or 40 feet? Why?20  feet container, it is more economical.
How can you load 25MT per 20 feet container?The metal roof tile is heavy cargos, the 20 feet container get enough room to load 25MT.
What is your mini quantity per color?20  tons/color
How many years of the paint would be lasting?Different  zinc, paint coating would lead to different result, and the environment has  great impact on the life time of painting
What is the leadtime?Normally for sheets we can delivery it   within 25-30 days. Depends on the quantity
Where is the delivery port ningbo / shanghai / tianjin
Quotation validity7 days
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