Plastic Material Data
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Below are typical valves for various generic plastics. For more precise values, please consult your resin supplier.

Material

Extrusion

Injection

Mold Shrinkage in Inches

Specific Gravity  

Density Lbs/In  

ABS

435

500

.005

1.03  

.037

Acetel

 

390

.020

1.41

.051

Acrylic 

375

450

.0045

1.17

.0422

FEP

600 

600 

.010

2.11  

.0775

Nylon 6

520 

550

.013

1.13 

.0405

Nylon 6/12 

475 

500

.011

1.07  

.039

Nylon 12

475 

445

.003

1.04 

.038

Polycarbonate 

550 

575 

.006

1.20

.0434

PBT 

 

460

.020

1.34  

.0484

PET 

480 

490

.002

1.31

.0482

HDPE

410 

480

.025

.955

.0345

LDPE

600 

400

.027

.92

.033

LLDPE

500 

425

.025

.92

.034

Polypropolene

450 

490

.005/.018

.91

.033

PVC-Rigid

380 

380

.025

1.29/1.4

.050

PVC- Flexible

365 

300

.025

1.23/1.37

.050

Polyurethane

400 

400

.02

1.2 

.0433

PTFE

 

 

 

2.16

.0785

Kynar

 

 

 

 

 

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