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Plastic Moulding Processing Characteristic


Material Injection Moulding Injection Moulding Mould Linear Specific Gravity
Temperature °C Pressure kg/cm2 Shrinkage% mm /mm
 Polyethylene and Ethylene Copolymers

Low Density

150 - 300

560 - 2100

1.5 - 5.0

0.920 - 0.925

Medium Density

150 - 300

560 - 2100

1.5 - 5.0

0.926 - 0.940

High Density

150 - 300

700 - 1400

2.0 - 5.0

0.941 - 0.965

Ethylene Ethyl-Acrylate

 

 

 

 

Copolymer

125 - 300

560 - 1400

1.5 - 3.5

 0.93

Ethylene Vinyl Acetate

 

  

 

 

Copolymer

125 - 300

560 - 1400

0.7 - 1.1

 0.925 - 0.950

 Polypropylenes

Unmodified

200 - 225

700 - 1400

1.0 - 2.5

0.902 - 0.910

Copolymer

200 - 225

700 - 1400

0.9 - 2.0

0.890 - 0.910

Inert Filled

180 - 225

700 - 1400

0.5 - 1.5

1.0 - 1.03

Glass Reinforced

225 - 275

700 - 1400

0.4 - 0.8

1.05 - 1.24

Impact {Rubber Modified}

200 - 275

1050

1.0 - 2.5

0.890 - 0.910

 Vinyl Polymers and Copolymers

Rigid

150 - 210

700 - 2800

0.1 - 0.5

1.30 - 1.45

Flexible Unfilled

160 - 190

560 - 1750

0.1 - 0.5

1.16 - 1.35

Flexible Filled

160 - 190

560 - 1750

0.8 - 3.5

1.3 - 1.7

Vinyl Butyral Moulding

150 - 200

700 - 2100

0.5 - 2.5

1.65 - 1.72

Vinyl Formal Moulding

 

 

 

 

Compounds

150 - 200

700 - 2100

0.15 - 0.30

1.2 - 1.4

Chlorinated Polyvinyl

 

 

 

 

Chloride Compound

190 - 210

1050 - 2800

0.3 - 0.7

1.49 - 1.58

Vinyl Butyral Moulding

 

 

 

 

Compound Flexible Unfilled

125 - 170

1050 - 2100

-

1.05

ABS Modified Vinyl Chloride

 

 

 

 

Rigid Flexible

200

560 - 1750

0.4 - 1.5

1.35

PP Modified Vinyl Chloride

 

 

 

 

Rigid

115 - 190

560 - 1120

0.2 - 0.5

1.28 - 1.58

 Polystyrene

Unfilled Free Flowing

 

 

 

 

General Purpose Heat

 

 

0.1 - 0.6 [C]

 

Resistant

160 - 250

700 - 2100

0.2 - 0.6 [I]

1.04 - 1.09

Impact Resistant high

 

 

 

 

Impact Medium Impact

175 - 300

700 - 2100

0.2 - 0.6

1.04 - 1.10

Special Heat and Chemical

 

 

 

 

Resistant Type

175 - 350

700 - 2100

0.1 - 0.8

1.04 - 1.10

20-30% Glass Filled

225 - 310 

1050 - 2800

0.1-0.2

1.2 - 1.33

Styrene Acrylonitrile

 

 

 

 

Copolymer Unfilled

190 - 290

700 - 2310

0.2 - 0.7

1.075 - 1.100

 Acrylics

Moulding

160 - 260

700 - 1400

0.1 - 0.4 [C]

1.17 - 1.20

Impact Acrylic Moulding

 

 

 

 

Compound

200 - 260

700 - 1400

0.2 - 0.8 [I]

1.11 - 1.18

MMA (Alphamethylestyrene

 

 

 

 

Copolymer

175 - 275

700 - 2100

0.20 - 0.6

1.09

Acrylic Multi Polymer

200 - 240

700 - 1400

0.6 - 1.0

1.09 - 1.14

 Nylon

Unmodified

260 - 310

-

0.8 - 1.5

1.13 - 1.15

Nucleated

260 - 310

-

0.7 - 1.2

1.13 - 1.16

30-35% Glass Reinforced

260

-

0.5

1.34 - 1.42

 Acetals

Homopolymer

190 - 235

700 - 1400

2.0 - 2.5

1.42

Copolymer

185 - 240

700 - 1400

2.0 - (AVG)

1.41

20% Glass Filled

175 - 240

700 - 1400

1.3 - 2.8

1.56

25% Glass Filled Copolymer

190 - 240

700 - 1400

0.2 - 0.6

1.61

TFE - Fiber Reinforced

185 - 225

700 - 1400

2.0 - 2.5

1.54

 Runner Diameters for Unfilled Materials

MATERIAL

RUNNER DIAMETER

ABS, SAN

3/16 - 3/8

Acetal

1/8 - 3/8

Acrylic

5/16 - /3/8

Nylon

1/16 - 3/8

Polycarbonate

3/16 - 3/8

Polymide

3/16 - 3/8

Polypropylene

3/16 - 3/8

PVC Rigid (Modified) 

1/4 - 5/8

Polyurethane

1/4 - 5/16

Suggested Sustaining Mould Temperatures for Various Plastics After Plastics is Melted.

MATERIAL

TEMPERATURE °F [°C]

Acetal (Copolymer)

200 [93]

Acetal (Homopolymer)

210 [99]

Acrylic

180 [82]

ABS

185 [85]

Nylon - 6

200 [93]

Nylon - 6/6

175 [79]

Polyamide

400 [204]

Polycarbonate

220 [104]

Polypropylene

120 [49]

PVC Rigid

140 [60]

PVC Flexible

80 [27]

San

100 [38]

Urethane Elastomer

120 [49]

  

 P & D Engineers Pvt. Ltd.
B/9 1st Floor Parsi Panchyat Complex, 
Nr, Jasoda nagar, G.I.D.C. Road, Vatva 
Ahmedabad 382 445 (Gujarat) INDIA

Phone : +91-79-25830217
Fax : +91-79-25830217
E mail :
info@pdepl.com, pdengineers@gmail.com

 

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