高反射PTFEシート
![](https://www.thorlabs.co.jp/Images/GuideImages/13871_PTFESheets_1.jpg)
- Omnidirectional, Diffusely Reflective PTFE Ideal for UV Sterilization
- >93% Average Reflectance from 250 to 400 nm
- Usable at Temperatures up to 260 °C
- Hydrophobic and Chemically Inert
PMR10P1
33 cm x 33 cm Sheet with
Adhesive Backing
PMR10R2
33 cm x 13.2 m Sheet
![](../../images/loading-red.gif)
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Specifications | ||||
---|---|---|---|---|
Item # | PMR10P1 | PMR10R1 | PMR10R2 | |
PTFE Dimensions | Thickness | 0.75 mm | ||
Width | 33 cm | |||
Length | 33 cm | 13.2 m ± 1.5 m | ||
Adhesive Backing | 3M 93020 Tape w/ 300LSE Adhesive, 0.20 mm Thicka | None | ||
Average Reflectance (Click for Graph; Raw Data) | > 93% (250 - 400 nm) > 92% (400 - 800 nm) | |||
Dielectric Constant | 1.7 | |||
Operating Temperature | -40 to 260 °C | |||
UL Rating | 5VA V-0 (UL 94), f1 (UL 746C) |
![PTFE UV Reflectance](https://www.thorlabs.co.jp/images/tabimages/PMR10_Reflectance_G1-350.gif)
Click to Enlarge
PMR10シリーズのPTFEシートと一般的な金属との反射率の比較
特長
- 全方向に高い引張強度を有する多孔質の焼結PTFE
- ランバート反射に近い特性
- Ravg > 93% (250~400 nm)
- スカイブ(シェーブ)加工による正確な厚さ制御
- 疎水性(IP規格に準拠)
- 特注品に関しては、当社までお問い合わせ下さい。
- 異なるサイズ
- 裏面に接着剤付きまたは無し
ポリテトラフルオロエチレン(PTFE)シートは、UV光を高効率で均一に拡散反射するため、UV光照射や対象物の消毒などに適しています。250~400 nmで93%以上の平均反射率を有し、これは研磨されたアルミニウムやステンレススチールよりも優れています。PTFEは化学的に不活性でUV耐性もあり、ポリエチレン、ポリカーボネート、ナイロンなどの一般的なポリマーには見られない特性があります。
焼結およびスカイブ加工
これらのシートは最初にPTFE粒子を焼結して作られますが、そこではまず粒子を熱と圧力で融合させ、凝集した多孔質固体を生成します。この技術により、気孔のサイズや容積などの材料特性を正確に制御できます。次に、この材料をスカイブ加工(バルクから薄層をカットする工程)して、0.75 mmの均一な厚さのシートを生成します。
モールド成形PTFEや延伸PTFE(ePTFE)との比較
焼結してスカイブ加工されたPTFEには、耐屈曲疲労性や全方向への拡散反射特性などのほか、加熱溶接や振動溶接ができるといった多くの利点があります。試験†では、焼結後にスカイブ加工されたPTFEサンプルは、焼結後にモールド成形されたサンプルのメジアン孔径(約7〜27 µm)に比べて、より小さな一貫したメジアン孔径(約1〜7 µm)を有することも示されています。気孔構造が強固なため、組立て時の取り扱いを安全に行うことができ、エンクロージャの内側または外側に簡単に取り付けることができます。これは押出成形PTFEを加熱延伸して作られる延伸PTFE(ePTFE)とは対照的です。ePTFEはそれを構成するノードとフィブリル(細糸状構造)の強度が低いため壊れやすく、支持層が必要です。さらに、ePTFEメンブレンは温度や圧力にも敏感です。
† Porex社によるUltraviolet Reflectance of Microporous PTFE [ホワイトペーパー]参照。
Posted Comments: | |
Dave Hommes
 (posted 2024-04-01 11:04:21.957) Do you have data detailing degradation to UV wavelengths in the 254nm range, over set periods of time? jdelia
 (posted 2024-04-05 09:57:20.0) Thank you for contacting Thorlabs. Unfortunately, at this time, we do not have data on UV degradation over time for our PMR10P1. However, in page 10 of the "Ultraviolet Reflectance of Microporous PTFE" white paper we offer, it states "Pure PTFE, unlike many other polymers, shows little degradation under UV exposure above 240 nm", which is shorter than your 254 nm source. EBERECHI ICHI
 (posted 2023-01-18 08:31:05.803) Please, what is the reflectance up to the range of 1700um (NIR-band)? you only gave information upto 400um jdelia
 (posted 2023-01-19 12:55:23.0) Thank you for contacting Thorlabs. Assuming you meant "1700 nm," then we do already have this data available on the website. You would just need to go to the "Average Reflectance" row of the "Specifications" table on the product family page. There we offer a reflectance graph that goes up to 2450 nm as well as downloadable raw data. user
 (posted 2022-05-05 15:00:51.79) To follow the discussion of Joao Lopes, which type of product would fit better for a specular reflection in the UV range? cdolbashian
 (posted 2022-05-10 04:12:42.0) Thank you for reaching out to us Jan. You are seeking to create a large asymmetric parabolic surface. Unfortunately, we do not have the capability to create such a surface with the methods which we have access to. We do not have a suggestion for a solution to such an application unfortunately. For future application-based discussions, please feel free to email techsupport@thorlabs.com. João Lopes
 (posted 2022-04-07 10:08:40.573) Hi,
Will this sheet be of a good use for a solar reflector?
The range of interest being UV radiation. cdolbashian
 (posted 2022-04-13 11:17:31.0) Thank you for reaching out to us João. The PMR10P1 does indeed have a high reflectivity for UV spectra (easily over 90%), however, the reflection is an incoherent diffuse reflection. Based on what we discussed via email, it seems like you are more interested in a specularly reflective surface, rather than a diffuse one. user
 (posted 2021-08-19 05:18:06.637) Hello, I would like to ask if these sheets are fluorescent, i.e., if UV illumination causes reemission at different wavelengths. If yes, are there any additional measured data available that would show the Stokes shift, etc.? Thank you very much! cdolbashian
 (posted 2021-09-10 11:06:25.0) Thank you for contacting us here at Thorlabs! There is no evidence that these PTFE sheets are fluorescent, they are simply highly reflective within the UV spectra. |