Understanding of UV | Over 32 Years Twin Wall Polycarbonate Sheets Manufacturer | Sun Asia Enterprise Co., Ltd.

Over 30 years of extruded polycarbonate manufacturing industry. Specialized in outdoor durable building materials.

Understanding of UV



Understanding of Anti-UV Coating

With a layer of anti-UV coated on the surface during the process of co-extrusion could prolong the lifespan of the sheet. Purpose of the anti-UV coating is to prevent ultraviolet from shining through which could cause the sheet from turning yellowish and ends with crack. Polycarbonate sheet maintains an excellent transparency surface over a period of time compare to others.

The Way of Anti-UV Coating:
Understanding of Anti-UV Coating

QUV Durable Test:

Production Mode Yellowish fig. Years of Yellowish
UV W/o anti-UV Above Δ YI 40 Yellowish in short time
UV Stabilize anti-UV Δ YI 10 ~ 15 2 ~ 3 years
UV Coating Normal anti-UV Δ YI 3~7 3 ~ 5 years
UV Coating High Performance anti-UV Below Δ YI 6 10 years & above

Anti-UV-Coating

Polycarbonate sheet with Anti-UV coating not only reduces ultraviolet from transmitting but also protect Polycarbonate sheet against any harmful damage and prolong properties of Polycarbonate Sheet. Surface of the sheet form a protective force against factory pollution, exhaust emission from vehicles, dust and acid rain stain. It enables the sheet to maintain as new as it is.

Anti-UV-Coating

Co-extrusion with Anti-UV coating on the surface shall effectively blocking harmful ultraviolet rays, protect against ultraviolet from transmitting which cause sheet to crack, turn yellow and effectively maintain physical properties of Polycarbonate.

Understanding of Anti-UV Coating
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UV Degradation

FAQ: What waviness of UV causes biggest damage to Polycarbonte?
A:

UV-A: 320nm ~ 380nm
-Influence of UV-A on polymer: It might cause some certain polymers to degrade.
-Influence of UV-A on human: In general, there is no harm to human body, but human often expose under the UV-A during the life time. The UV-A permeates deeply and strongly so that skin becomes lack of elasticity easily.

UV-B: 280nm ~ 320nm
-Influence of UV-B on polymer: This is the lowest waviness of sun light, and mainly causes polymers to degrade.
-Influence of UV-B on human: UV-B is strongest during 10 AM to 2 PM. UV-B would make skin rough, sensitive, weak, and even become skin cancer. It's easy to get sunburn because of UV-B.

UV-C: lower than 280nm
-Influence of UV-C on polymer: UV-C would cause some abnormal effects on polymers.
-Influence of UV-C on human: UV-C can destroy microorganism. UV-C is absorbed by ozonosphere while passing the atmosphere. As the results, UV-C wouldn't cause any damage to skin.

Certain waviness which might cause biggest damage:

Polymer Certain waviness which might cause biggest damage (nm)
Polyvinyl acetate < 280
Polycarbonate  (PC) 285, 305, 330, 360
PMMA 290, 325
SAN 290, 325
PE 300
PP 310, 370
PS 319
PVC 320
PET / PBT 325
PA 280 - 290, 300 - 320

The QUV weather ability test of Polycarbonate boards made by SUN ASIA:

Ways The Index Of Yellowing Useful Life Without Yellowing
No Anti-UV Higher than 40 Yellowing at A Short Time
Anti-UV Contain 10 ~ 15 1 ~ 2 Years
General Anti-UV Coating 3 ~ 7 3 ~ 5 Years
Long-Lasting Anti-UV Coating Lower than 6 Lower than 10 Years

Data criterion above is base on 313nm for this test.

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Understanding of UV | Over 32 Years Twin Wall Polycarbonate Sheets Manufacturer | Sun Asia Enterprise Co., Ltd.

Located in Taiwan since 1990, Sun Asia Enterprise Co., Ltd. has been a heat resistant polycarbonate sheet manufacturer. Their main products, including Polycarbonate Sheets, Polycarbonate Roofing Sheets, Polycarbonate Panels, Clear Polycarbonate Sheets, Plastic Sheets, Polycarbonate Greenhouse Sheets, Light Diffuser Panels, Twin Wall Polycarbonate Sheets and Multiwall, which are ISO 9001 certified.

Based in Taiwan, SUN ASIA is one of the primary polycarbonate sheet suppliers since 1990. Multiwall polycarbonate sheets, solid polycarbonate sheets, embossed polycarbonate sheets and frosted polycarbonate sheets with other wide range of polycarbonate sheet solutions for traditional construction, civil engineering, interior design and lighting industries. Safe and secured with competitive price. Over 30 years of extruded polycarbonate manufacturing industry. Specialized in outdoor durable building materials.

SUN ASIA has been offering customers high-performance roofing polycarbonate sheets, both with advanced technology and 34 years of experience, SUN ASIA ensures each customer's demands are met.