Plastic molding processing temperature, mold temperature and general plastic shrinkage during injection molding

List of plastic molding processing temperatures, mold temperatures, and general plastic shrinkage rates during injection molding

Plastic molding processing temperature, mold temperature and general plastic shrinkage during injection molding

Chinese name

English

density

Glass fiber content

Average specific heat

Processing temperature

Mold temperature

Shrinkage

[g/cm3]

[%]

[KJ/(kg x K)]

[°C]

[°C]

[%]

Polystyrene

PS

1.05



1.3

180-280

10

0.3-0.6

Polystyrene, medium and high impact

HI-PS

1.05



1.21

170-260

5-75

0.5-0.6

Polystyrene-acrylonitrile

SAN

1.08



1.3

180-270

50-80

0.5-0.7

Acrylonitrile-butadiene-styrene

ABS

1.06



1.4

210-275

50-90

0.4-0.7

Phenylene-styrene-acrylic acid

ASA

1.07



1.3

230-260

40-90

0.4-0.6

Low-density polyethylene

LDPE

0.954



2.0-2.1

160-260

50-70

1.5-5.0

High-density polyethylene

HDPE

0.92



2.3-2.5

260-300

30-70

1.5-3.0

Polypropylene

PP

0.915



0.84-2.5

250-270

50-75

1.0-2.5

Polyene-GR

PPGR

1.15

30

1.1-1.35

260-280

50-80

0.5-1.2

Polyisobutylene

IB







150-200





Polymethylpentene

PMP

0.83





280-310

70

1.5-3.0

Soft polyvinyl chloride

PVC-soft

1.38



0.85

170-200

15-50

>0.5

Hard polyvinyl chloride

PVC-rigid

1.38



0.83-0.92

180-210

30-50

0.5

Polyfluoroethylene

PVDF

1.2





250-270

90-100

3.0-6.0

PTFE

PTFE

2.12-2.17



0.12

320-360

200-230

3.5-6.0

Fluorinated vinyl propylene copolymer

FEP













Polymethyl methacrylate (propylene)

PMMA

1.18



1.46

210-240

50-70

0.1-0.8

Polyoxymethylene (ethylene)

POM

1.42



1.47-1.5

200-210

>90

1.9-2.3

Polyphenylene oxide or polyoxybenzene

PPO

1.06



1.45

250-300

80-100

0.5-0.7

Polyphenylene oxide-GR

PPO-GR

1.27

30

1.3

280-300

80-100


Cellulose acetate

CA

1.27-1.3



1.3-1.7

180-320

50-80

0.5

Acetic acid-butyric acid cellulose

CAB

1.17-1.22



1.3-1.7

180-230

50-80

0.5

Propionate

CP

1.19-1.23



1.7

180-230

50-80

0.5

Polycarbonate

PC

1.2



1.3

280-320

80-100

0.8

Polycarbonate-GR

PC-GR

1.42

10-32

1.1

300-330

100-120

0.15-0.55

Polyethylene terephthalate

PET

1.37





260-290

140

1.2-2.0

Polyethylene terephthalate-GR

PET-GR

1.5-1.57

20-30



260-290

140

1.2-2.0

Polybutylene terephthalate

PBT

1.3





240-260

60-80

1.5-2.5

Polybutylene terephthalate-GR

PBT-GR

1.52-1.57

30-50



250-270

60-80

0.3-1.2

Nylon 6 (polyamine 6)

PA 6

1.14



1.8

240-260

70-120

0.5-2.2

Nylon 6-GR

PA 6-GR

1.36-1.65

30-50

1.26-1.7

270-290

70-120

0.3-1

Nylon 6/6

PA 66

1.15



1.7

260-290

70-120

0.5-2.5

Nylon 6/6-GR

PA66-GR

1.20-1.65

30-50

1.4

280-310

70-120

0.5-1.5

Nylon 11

PA 11

1.03-1.05



2.4

210-250

40-80

0.5-1.5

Nylon 12

PA 12

1.01-1.04



1.2

210-250

40-80

0.5-1.5

Polyether oxime

PSO

1.37





310-390

100-160

0.7

Polysulfide

PPS

1.64

40



370

>150

0.2

Thermoplastic polyurethane

PUR

1.2



1.85

195-230

20-40

0.9

Phenol Formaldehyde Resin GP

PF

1.4



1.3

60-80

170-190

1.2

Melamine formaldehyde GP

MF

1.5



1.3

70-80

150-165

1.2-2

Melamine phenol formaldehyde

MPF

1.6



1.1

60-80

160-180

0.8-1.8

Polyester resin

UP

2.0-2.1



0.9

40-60

150-170

0.5-0.8

Epoxy resin

EP

1.9

30-80

1.7-1.9

Ca.70

160-170

0.2

Soft PE shrinkage - 2.5% a Note the different shrinkage rates and flow effects in the flow direction and lateral direction.

Dongguan Gaofa Plastic Material Co., Ltd.



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