Best Twin Wall Polycarbonate You Could Find In China

Twin wall Polycarbonate Introduction

Twin Wall Polycarbonate offers a rectangular insulation space inside to reduce thermal energy transfer. Meantime, it creates a stronger, lighter weight, and more impact resistance structure. Some people call it a “Double-Wall Polycarbonate Sheet”. With the co-extruded UV coating layer, twin wall polycarbonate sheet offers great weatherability even under intensive ultraviolet rays, the lifespan is more than 10 years or 15 years. Therefore, it can be used exterior.

Twin Wall Polycarbonate is from 4 to 12 millimeters in thickness, the Max. Width is 2.1 meters. It is about 20% or 30% price of flat polycarbonate sheet with the same thickness. Otherwise, twin wall polycarbonate sheet is really lighter-weight, and a bit lower light transmittance, but it offers excellent thermal energy saving capability, therefore, it is the right material for roofing applications, for example, commercial greenhouse, mini-greenhouse, sunroom, garden Restaurant, etc.

With more than 15 years of experience in the polycarbonate field, UVPLASTIC has grown to be the leading manufacturer of twin wall polycarbonate sheets in China. Meantime, we launched S-Type Double Wall Polycarbonate for higher strength in 2016. Today, we are providing high-quality twin-wall polycarbonate to more than 40 countries.

Main Benefits of Twin Wall Polycarbonate

  • Twin Wall Polycarbonate is really lightweight than Flat Polycarbonate Sheet;
  • It is highly cost-effective, only 20% or 30% price of Solid Polycarbonate Sheet;
  • Co-extruded UV protective layers on one or two sides for improved durability;
  • Easy to cut to size and install on roof;
  • Withstands most extreme hot and cold climates between -40°C to 120 °C;
  • S-type double wall polycarbonate is available for higher strength;
  • Anti-condensation Coating Layer is on inside surface for greenhouse application;
  • Accessories are available;

Product Specification

Standard Size of UVMPC twin wall polycarbonate

ModelThicknessU-Value (W/m²·°K)Light Transmission, clear, %Width 700 (mm)Width 1050 (mm)Width 2100 (mm)
UVMPC-TW(S)-44 mm3.9682%
UVMPC-TW(S)-66 mm3.5680%
UVMPC-TW(S)-88 mm3.2679%
UVMPC-TW(S)-1010 mm3.0278%
UVMPC-TW(S)-1212 mm2.7876%

Products Range

UVMPC-TW-U1Standard type Twin wall polycarbonate sheet with co-extruded UV protective on one side
UVMPC-TWS-U1S-line twin wall polycarbonate sheet with co-extrude UV protective on one side
UVMPC-TW-U1AStandard type twin wall polycarbonate sheet with co-extrude UV protective on one side and anti fog coating on inside for greenhouse
UVMPC-TWS-U1AS-line twin wall polycarbonate sheet with co-extrude UV protective on one side and anti fog coating on inside for greenhouse
UVMPC-TW-U2Standard type twin wall polycarbonate sheet with co-extrude UV protective on two side
UVMPC-TWS-U2S-line twin wall polycarbonate sheet with co-extrude UV protective on two side

Physical Properties

Physical PropertiesTesting MethodUnitValue
Specific GravityD-792g/cm31.2
Light transmittanceD-1003%>76
Heat deflection temperature (HDT)D-648°C140
Service Temperature – Short term°C-50 to +120
Service Temperature – Long term°C-40 to +100
Impact falling dartISO 6603/1J40-400
Tensile Strength at YieldD-638Mpa or N/mm²>60
Tensile Strength at BreakD-638MPa or N/mm²>65
Coefficient of Linear Thermal ExpansionD-696mm/m °C0.065
Thermal ConductivityC-177W/m K0.21
Elongation at BreakD-638%>100
Tensile Modulus of ElasticityD-638MPa2400
Flexural StrengthD-790MPa100
Practical thermal expansion/contractionmm/m3

Default third-party testing organization is SGS

Color Description

ModelClearBronzeWhite opalGreenBlueCustom Color


Frequently Asked Question

The function of the UV coating layer is to protect twin wall polycarbonate from damage by ultraviolet rays. UVPLASTIC offers three types of UV coating options.

ModelUV Coating Status
UVMPC-TW-U1UV Coating Layer on the Outside Surface
UVMPC-TW-U1AUV Coating Layer on the Outside Surface, Anti Fog Coating Layer on the Internal Surface
UVMPC-TW-U2UV Coating Layer on two Surface

Here is the list of the weight of per square meter for each thickness, you can calculate the total weight.

ModelThickness (mm)Weight per Sqm (Kg)

Unlike glass, twin wall polycarbonate is very strong, it is 200 times stronger than glass, meantime, it offers lighter weight than other types of polycarbonate plastic. But you need to reduce the distance between the mounting points.

UVPLASTIC developed S-type twin wall polycarbonate sheets to increase the strength when curving the twin wall polycarbonate sheet, please the following picture.

UVPLASTIC is a leading manufacturer of twin wall polycarbonate sheet

It depends on the applications. If you use the twin wall polycarbonate sheet for roofing, we don’t recommend 4mm twin-wall or solid polycarbonate sheets for roofing application, because 4mm twin wall polycarbonate isn’t strong enough. And four wall polycarbonate sheet is also another good choice. Solid polycarbonate sheet is too heavy and you need to use stronger supporting frames, it will be a high cost.

Twin wall polycarbonate with more than 6mm thickness and corrugated polycarbonate sheets will be the right choice.

Don’t thermoform the twin wall polycarbonate sheet, if you have no experience in this field. UVPLASTIC is not only the leading manufacturer of polycarbonate sheets but also the expert at Machining Polycarbonate, we can help clients with thermoforming twin wall polycarbonate sheets.

Yes, 4mm twin-wall polycarbonate is the best material for a garden greenhouse, because it is lightweight and durable. For a cold location, 6mm twin-wall polycarbonate sheet will be better.

Normally, 8mm twin-wall polycarbonate sheet is a great material for agriculture greenhouse. But 6mm twin wall polycarbonate sheets are used for a smaller greenhouse, and 10mm twin wall polycarbonate sheets are for greenhouse in a colder place.

Twin wall polycarbonate is one of the durable twinwall plastic sheets, the lifespan is more than 10 years or 15 years. The warranty is 10 years, the longest warranty is 15 years with clients’ requirements.

4mm thickness twin wall polycarbonate is suitable for the roof of the garden greenhouse. 6mm, 8mm, and 10mm thickness of twin wall polycarbonate are best material for the roof of commercial greenhouse. Click HERE for more detail.

Corrugated polycarbonate and twin wall polycarbonate offer different performance, corrugated polycarbonate offers excellent light transmittance, twin wall polycarbonate offers good heat transmission. But both are great materials for greenhouse roofing.

UVPLASTIC is a leading manufacturer of twin wall polycarbonate sheets in China, we are looking for the distributor and reseller for twin wall polycarbonate sheet in global market. Click HERE to know the detail of our distributor policy.


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