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Injection molding is a manufacturing process where plastic is forced into a mold cavity under pressure. A mold cavity is essentially a negative of the part being produced. The cavity is filled with plastic, and the plastic changes phase to a solid, resulting in a positive. Typically injection pressures range from 5000 to 20,000 psi. Because of the high pressures involved, the mold must be clamped shut during injection and cooling. Clamping forces are measured in tons.

Abbreviations for the Plastics Industry
 - Plastics, Preproducts and Rubbers

AAS

Methacrylate-acrylic-styren

PEEK

Polyaryletherketone

ABS

Acrylonitrile-butadiene-styrene

PEI

Polyetherimide

ACM

Acrylic acid ester rubber

PEO, PEOX

Polyethylene oxide

ADC

Allyl diglycol carbonate

PEPA

Polyester block amides

AES

Acrylonitrile-ethylene- propylene-styrene

PEP

Polyethylene-propylene

AMMA

Acrylonitrile-methyl methacrylate

PES

Polyester sulphone

ANM

Acrylic acid ester rubber

PET, PETP

Polyethylene terephthalate

APP

Atactic polypropylene

PETG

Polyethylene terephthalate, glycol comonomer

ASA

Acrylonitrile-styrene-acrylic ester

PF

Phenol formaldehyde

AXS

Acrylonitrile-styrene- terpolymers

PFA

Perfluoro alkoxy alkaline

BR

Cis-1, 4-polybutadiene rubber

PFEP

Polytetrafluorethylene- perfluoro-propylene

BS

Butadiene-styrene rubber

PFF

Phenol-furfural

CA

Cellulose acetate

PI

Polyimide

CAB

Cellulose acetate-butyrate

PIB

Polyisobutylene

CAP

Celluose acetate propionate

PIBI

Butyl rubber

CF

Cresol formaldehyde

PIR

Polyisocyanate

CHR

Epichlorhydrine

PMCA

Polymethyl - chloroacrylate

CMC

Carboxymethyl cellulose

PMI

Polymethacryloimide

CN

Cellulose nitrate

PMP

Poly- 4 -methylpentene-1

CP

Cellulose propionate

POM

Polyoxymethylene, polyacetal

CPE

Chlorinated polyethylene (correctly:PEC)

PP

Polypropylene

CPVC

Chlorinated polyvinylchloride (correctly:PVCC)

PPC

Chlorinated polypropylene

CR

Chloroprene rubber

PPMS

Polyparamethylstyrene

CS

Casein

PPO(S)

Polyphenylene oxide (styrene)

CSM

Chlorosulfonated polyethylene

PPOX

Polypropylene oxide

CTA

Cellulose triacetate

PPS

Polyphenylene sulfide

DAP

Diallyl phthalate

PPSU

Polyphenylene sulfone

EC

Ethyl cellulose

PS

Polystyrene

ECB

Ethylene-cop-bitumen

PSB

Styrene butadiene rubber

ECTFE

Ethylene-chlorotrifluoro- ethylene

PSU

Polysulfone

EEA

Ethylene-ethylacrylate

PTFE

Polytetrafluorethylene

EMA

Ethylene-methacrylic acid

PTP

Polyterephthalates

EP

Epoxy epoxide

PUR

Polyurethane

EPDM

Ethylene-propylene teropolymer rubber

PVAC

Polyvinyl acetate

EPM

Ethylene-propylene rubber

PVAL

Polyvinyl alcohol

EPS

Expanded polystyrene

PVB

Polyvinyl butyral

ETFE

Ethylene-tetrafluroethylene

PVC

Polyvinyl chloride

EVA, EVAC

Ethylene-vinyl acetate

PVCA

Polyvinyl chloride-acetate

FEP

Perfluoro ethylene-propylene

PVCC

Chlorinated polyvinyl chloride

FF

Furan formaldehyde

PVDC

Polyvinylidene chloride

GR-I

Butyl rubber

PVDF

Polyvinylidene fluoride

GR-N

Nitrile rubber

PVFM

Polyvinyl formal

GR-S

Styrene-butadiene rubber

PVK

Polyvinyl carbazole

IIR

Butyl rubber

PVP

Polyvinyl pyrrolidone

IPDI

Isophorone diisocyanate

RF

Resorcin formaldehyde

IR

Cis-1, 4-polyisoprene rubber

SAN

Styrene-acylonitrile

MBS

Methylmethacrylate- butadiene- styrene

SB

Styrene-butadiene

MC

Methyl cellulose

SBR

Styrene-butadiene rubber

MDI

Diphenylmethane diisocyanate

SI

Silicone plastics

MF

Melamine formaldehyde

Si

Silicone rubber

MMA

Methylmethacrylate

SMA

Styrene-maleic anhydride

MPF

Melamine-phenol- formaldehyde

SMS

Styrene - methylstyrene

NBR

Nitrile rubber

SRP

Styrene-rubber-plastics

NC

Cellulose nitrate

TAC

Triallylcyanurate

NR

Natural rubber

TFA

Fluor-alkoxy-terpolymer

PA

Polyamide (nylon)

TDI

Toluyl diisocyanate

PAA

Polyacrylic acid

TMDI

Trimethyl-hexamethylene diisocyanate

PAI

Poly-amideimide

TPU

Thermoplastic polyurethane

PAK

Polyester alkyd

TPX

Polymethylpentene

PAN

Polyacrylonitrile

UF

Urea formaldehyde

PB

Polybutene-l

UP

Unsaturated polyester

PBAN

Polybutadiene-acrylonitrile

VAC

Vinyl acetate

PBS

Polybutadiene-styrene

VC

Vinyl chloride

PBTP

Polybutylene therephthalate

VCE

Vinyl chloride-ethylene

PC

Polycarbonate

VCEVA

Vinyl chloride-ethylene- vinyl acetate

PCD

Polycarbodiimide

VCOA

Vinyl chloride-octylacrylate

PCTFE

Polymonochlorotri fluoroethylene

VCVAC

Vinyl chloride-vinyl acetate

PDAP

Polydiallyl phthalate

VCVDL

Vinyl chloride-vinylidene chloride

PE

Polyethylene

VF

Vulcanized fibre

PEC

Chlorinated polyethylene

Courtesy of Fleming Plastic Equipment, an extract from their ancillary equipment catalogue