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Clear Laminating Film: Polyvinyl Butyral Plasticised with Tributyl Citrate and Extruded (Nason, Monsanto, US 2,126,028)
The clear layer inside safety glass must stay rubbery from frost to summer heat and stick to glass on its own. Nason softened polyvinyl butyral with tributyl citrate, which stays in the film far better than the usual phthalate.
Result: a clear, rubbery, non-tacky film that bonds glass under heat and pressure without glue.
Source: Nason, US 2,126,028 (Monsanto, 1938). He used Butvar resin; ours is the polyvinyl butyral we make. Not given: film thickness. Picture drawn by Youblob.
Katamtaman
1 day
Mga Tagubilin
1
1
Weigh resin and plasticiser
Weigh resin and plasticiser
Take 100 parts of polyvinyl butyral resin and 50 parts of tributyl citrate (Nason: 50 or more parts mix freely).
Mga materyales para sa hakbang na ito:
Polyvinyl butyral resin100 parts
Tributyl citrate50 partsMga kailangang kasangkapan:
Timbangang panimbang2
2
Mix with slight warming
Mix with slight warming
Work them together with slight warming in a mixer (or dissolve both in acetone and let it evaporate) until the mass is even.
Mga kailangang kasangkapan:
Sisidlang panghalo
Pang-init na Plato3
3
Extrude into sheet
Extrude into sheet
Sheet the plasticised resin, for example by extrusion under pressure. Ours: a plastic extruder with a slot die. Thickness: not given.
Mga kailangang kasangkapan:
Extruder ng plastik
Die ng extrusion4
4
Check the film
Check the film
The film should be clear, moderately soft and rubbery, but not tacky. Pressed hot between glass sheets it bonds without adhesive.
Mga kailangang kasangkapan:
Pang-init na PlatoMga Materyales
2- 100 partsPlaceholder
- 50 partsPlaceholder
Mga Kinakailangang Kasangkapan
5- Placeholder
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