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ÀWỌN OHUN WÍWỌ̀
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.
Àárín
1 day
Ìlànà
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).
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Résínì polifáínílì bútírálì100 parts
Tíríbútílì sítíréètì50 partsÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba2
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.
Àwọn irinṣẹ́ tí a nílò:
Àgbá ìpò
Pátákó Gbígbóná3
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.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtújáde ṣíṣu
Ẹnu ìtújáde irin4
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.
Àwọn irinṣẹ́ tí a nílò:
Pátákó GbígbónáÀwọn ohun-èlò
2- 100 partsÀyè
- 50 partsÀyè
Àwọn irinṣẹ́ tó nílò
5- Àyè
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