Making Tableware Raw Material-Melamine Moulding Powder

Melamine Moulding Powder

Melamine moulding compounds ( thermosetting plastics) are amino moulding compounds composed of melamine formaldehyde and alpha cellulose as filling material with the addition of lubricant , hardening agent & pigments.

Thermosets offer many advantages over basic thermoplastics and are suitable for compression , transfer or injection moulding. They are produced in a precise, brilliant, light fastness and vibrant range of colors They are available in powder (which gives much better surface) or granular form.

Melamine moulding compounds are strong , glossy , very very durable and highly resistant to staining. They have better resistance to heat, solvents, chemicals, moisture, electricity and scratching than urea moulding compounds.

Physical and chemical specifications

Parameter	Value	Unit	Standard
Appearance	Solid – granular/powder form
Colour	Different according to customer requirements
Flow	(160 – 220)*      (100 – 140)**	mm x 10-2
CT	(36 – 44)*   (50 – 60)**	sec
Bulk density	0.600 – 0.650	gm/cm3	ISO 60
Specific weight	1.4 - 1.5	gm/cm3	Din 7708
Humidity (60 0C)	2 max	%
Volatile matter (110 0C)	4 max	%
Grain size	According to customer requirements	mm
Shrinkage	0.9 max	%	Din 7708
Water absorption	≤ 200	mg	ISO 14528
Mechanical Properties
1- Stress at break	( ≥ 40)*     (≥ 50)**	Mpa	ISO 14528
2- Flexural strength	(≥ 80)*     (≥ 90)**	Mpa	ISO 14528
3-Charpy Impact strength	(≥ 5)*                  (≥ 6)**	KJ/m2	ISO 14528
4- Charpy Notched Impact strength	(≥ 1.2)*      (≥ 1.4) **	KJ/m2	ISO 14528
Thermal  Properties
1-Temperature of deflection under load Tf (1.8)	≥ 155	0C	ISO 14528
2- Temperature of deflection under load Tf (8.0)	≥ 110	0C	ISO 14528
3- Flammability (glow bar) , BH	≤ BH2-10	-	ISO 14528
4- Flammability (UL classification)	V-0	Grade	UL 94
Electrical Properties
1-Surface Resistivity	≥ 1010	Ω	ISO 14528
2- Proof Tracking Index	≥ 600	-	ISO 14528
Brabender Plastograph	Plastogram	-	Din 53764
Colour testing	Colorimeter(x rite 8400)	-

* Compression moulding.

** Injection moulding.chemicals, moisture, electricity and scratching than urea moulding compounds.

Moulding Techniques

Preheating*condition		Moulding condition*
Temperature,0C	Time, sec	Temperature,0C	Pressure Kg/cm2	Curing time sec/mm	Time of production
80-90	30-60	160 – 170	400 min	11 – 12	According to shape , thickness , ……. of the product

Major application areas

• Melamine thermosets are approved for contact with foodstuffs and they   don't affect the food's flavor even at high temperatures so they are used in    kitchen, utensils and dinner ware. • Bathroom accessories and electrical components. • Precision medical components.  Packing, handling and storage Packing: o 25Kgs. nett laminated polyethylene bags Handling: o It is advisable to wear a dust musk while emptying the bags . Hand should be thoroughly washed at the end of the working day and before  meals.   Storage: o Storage at 250c gives stability for 6 months o Avoid moisture, dirt, packaging damage &high temperature which affect the materials Flow and its mouldability. o  o