高反射PTFEシート

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

PMR10R4

34 cm x 21 m Sheet

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概要
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Specifications
Item #		PMR10P1	PMR10R3	PMR10P2	PMR10R4
PTFE Dimensions	Thickness	0.75 mm
	Width	33 cm	33 cm	34 cm	34 cm
	Length	33 cm	21 ± 1.5 m	34 cm	21 ± 1.5 m
Adhesive Backing		3M 93020 Tape w/ 300LSE Adhesive, 0.20 mm Thick^a		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)

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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
R_avg > 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)
標準品と異なる長さのシートをご希望の場合は当社までお問い合わせ下さい。

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(右グラフ参照)。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。

† 試験はPorex Corporationで実施されています。詳細についてはホワイトペーパーUltraviolet Reflectance of Microporous PTFEをご覧ください。

Posted Comments:

user (posted 2025-07-01 13:10:53.297)

Would this be suitable for use with a hyperspectral camera?

ksosnowski (posted 2025-07-02 05:21:42.0)

Hello, and thanks for reaching out to us. The reflectance spectrum of the PMR10 PTFE material can be viewed in the Specifications section of our Overview tab by clicking ‘raw data’. Overall the performance is fairly broadband, covering the UV, Visible, and NIR ranges. While our sample data only extends from 250 to 2450nm, the reflectance remains over 84% for this entire spectrum. For hyperspectral analysis, the PMR10 material can help cover a wide very range of wavelengths.

user (posted 2025-04-22 10:09:29.157)

Hi, are these sheets thermally conductive?

jdelia (posted 2025-04-24 11:13:37.0)

Thank you for contacting Thorlabs. These sheets are made out of PTFE which is generally considered thermally insulative. I have reached out to you directly to further discuss your application.

user (posted 2025-03-03 07:24:09.603)

What is the cleaning process for this material?

jpoling (posted 2025-03-03 12:51:04.0)

Thank you for contacting Thorlabs. Typical optics cleaning methods as outlined in our Optics Handling Tutorial (link below) will be sufficient. A common method is to use methanol, acetone, or isopropyl alcohol, along with Wepril or Kimwipes, and then use the "drop and drag" method. I have reached out to you directly with a chemical compatibility chart for PTFE. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=9025

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.