Scratch resistant PMMA made possible in the Value Chain Project

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Scratch resistant PMMA made possible in the Value Chain Project Mark Bierens, November 11, 2014

Transcript of Scratch resistant PMMA made possible in the Value Chain Project

Page 1: Scratch resistant PMMA made possible in the Value Chain Project

Scratch resistant PMMA made possible in the Value Chain Project

Mark Bierens, November 11, 2014

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Delta Glass profile• Manufacturer of        

acrylic cast sheets• Production site for 

Polyplastic, no sales• 18 workers• Production in 3 shifts  

from Monday till Saturday• Production capacity : 

1.500.000 sqm/yr ( 5000 ton PMMA)

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Production process• Monomer MMA 

(Methylmetacrylate) is casted between 2 glass panels

• A combination of 2 Glass panels with a PVC gasket is a mould

• Polymerisation will take place in autoclaves

• The product is an acrylic sheet PMMA

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Acrylic Sheets

• 2 – 12 mm range• All transparant 

colours• Impact resistant 

sheets• Niche product, 

bubbleplex

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Applications : Caravans & motorhomes

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Applications : hatches for yachts

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Glass versus PMMA

Property Glass PMMA

Transparancy ++ ++

Weight ‐ ++

Strenght ‐ ‐

Durable ++ +

Scratch resistant + ‐

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DPI Value Chain Project : Improved properties of PMMA

• Subject 1 : Glassfiber reinforced PMMA− Improve strength of a PMMA sheet by casting monomer into a glassfiber filled mould

• Subject 2: Scratch resistant PMMA− Development of a Scratch resistant coating suitable for PMMA

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Project partners :

• Delta Glass in Tholen • Plastica in Bergen op Zoom, specialized in 

thermoforming• Cortech in Yerseke,water cutting specialist• C2Coatings in Velp, Coating developer• Modified Materials In Halsteren, Material 

Engineering 

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Carbon fiber reinforced PMMA

Casting at Delta Glass, Testbars cutting realised by Cortech

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Reinforced PMMA, creep in time (mm)

0

2

4

6

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10

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0 50 100 150 200 250 300 350 400 450

PMMA (5 N)

Glas 0‐90 (10 N)

Carbon 0‐90 (10 N)

Glas‐45+45 (10 N)

Testing provided by Modified Materials

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Composite thermoforming 

Thermoforming realised by Plastica

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Subject 1 :Glassfiber reinforced PMMAProblems :• Bonding agent in glassfiber

interfere with polymerization 

• Glassfiber make it impossible to cut the sheet

• Sheets become warped, not flat, difficult to handle

• Entrapped air bubbles remains in the sheet

Solutions :• Use glassfiber without 

bonding agent 

• Use high pressure watercut machine

• Mould should be equally filled with fibers

• Very difficult to fit this product in our production facility. No short term solution 

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Subject 2 :Scratch Resistant Coating• suitable for PMMA• Trials with UV cured 

coatings, not suitable for outdoor usage 

• Trials with Thermo cured coatings with success 

• We developed a flow coat technique

UV cured coating provided by C2Coatings

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Prototype Coating line• New coating line 

inhouse this year only for testing

• Suitable for outdoor applications 

• High scratch resistance

• With the knowledge achieved we will invest next year in a production line 

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Lab facilities

• New Laboratory :− Atlas Weathering test − Ball drop test− Charpy test− Datacolor− Ash content measuring

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Lab facilities

• New Laboratory :− Cross cut tests− Taber & Haze value testing− Coating thickness 

measuring device (micron)

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New Markets :

• Windows for Automotive Impact resistant & scratch resistant PMMA

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New Markets

• Cooling doors for Supermarkets

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Conclusion :DPI value Chain Project gives you :• Better understanding of your own product• Project fund open doors to several companies• Sparring partners, perfect especially for small 

companies• Access to new markets 

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Thank you for your attention!