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It is currently 28 Apr 2024, 03:19
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cplusplus
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Post subject: Re: 3M's disc manufacturing method Posted: 28 May 2020, 19:01 |
Hardcore fan |
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Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
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Disclord posted some very insightful info here: The Day of the Triffids2P (photo-polymerization) is sometimes called cold-casting or cold-pressing because it does not use the high temperature involved in the injection molding manufacturing process (hot PMMA is injected at a high pressure into a mold). With the 2P manufacturing process, photopolymer plastic is stamped (transferring the pits) and then cured with UV light.
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sonicboom
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Post subject: Re: 3M's disc manufacturing method Posted: 29 May 2020, 15:23 |
Serious fan |
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Joined: 26 May 2014, 19:25 Posts: 236 Location: United States Has thanked: 65 times Been thanked: 92 times
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I'd like to attach a file from the Philips Technical Review, VOLUME 40, 1982, No. 10 which explains the Manufacture of LaserVision video discs by a photopolymerization process but alas the file is larger than the 2MB allowed here. It goes into detail about PMMA and 2P EDIT: I uploaded it to dropbox: https://www.dropbox.com/s/luzyiwzrxtklk ... 2.pdf?dl=0
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cplusplus
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Post subject: Re: 3M's disc manufacturing method Posted: 29 May 2020, 19:18 |
Hardcore fan |
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Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
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sonicboom wrote: It goes into detail about PMMA and 2P Thank you for posting this. Very insightful!
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je280
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Post subject: Re: 3M's disc manufacturing method Posted: 29 May 2020, 22:26 |
Hardcore fan |
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Joined: 13 Sep 2012, 23:14 Posts: 1199 Location: United Kingdom Has thanked: 265 times Been thanked: 259 times
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sonicboom wrote: I'd like to attach a file from the Philips Technical Review, VOLUME 40, 1982, No. 10 which explains the Manufacture of LaserVision video discs by a photopolymerization process but alas the file is larger than the 2MB allowed here. It goes into detail about PMMA and 2P EDIT: I uploaded it to dropbox: https://www.dropbox.com/s/luzyiwzrxtklk ... 2.pdf?dl=0 Thanks for that .
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