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Home > Industry News

Plastic Shrinkage Rate Chart

Views : 2203
Update time : 2024-06-15 22:41:55
Plastic Shrinkage Rate Chart

Plastic Shrinkage rate is a volume contraction rate of polymers from the melt state and the cooled condition that will determine the molding parts dimension and accuracy, it is expressed in percent.
Semi-crystalline polymers (e.g: PBT or PP) always show a higher shrinkage than amorphous polymers (e.g: PS or PC) because when cooled down semi-crystalline polymers will see part of their macromolecular chains re-arranged to form crystallite, that is a well-organized structure, leading to less space needed for the same amount of atoms. This volume contraction of polymers often leads to wrapped parts and dimension differences between manufactured parts and the mold (the die if we consider extrusion as the processing technique).
Plastic shrinkage rate is strongly depending on the polymer itself but also on the processing conditions applied and part design. A standard method to measure “molding plastic shrinkage”, ie contraction compared to the injection molding tool, is the ASTM D955. Other international standard methods related to plastic shrinkage are ISO 294-4 (for thermoplastics) and ISO 2577 (for thermosets).

Name of the polymer Explicit name of the polymer           Min Value(%)                 Max Value(%)
ABS Acrylonitrile-Butadiene Styrene 0.7 1.6
ABS FR Acrylonitrile-Butadiene Styrene flame retardant 0.3 0.8
ABS High Heat Acrylonitrile-Butadiene Styrene High Heat 0.4 0.9
ABS High Impact Acrylonitrile-Butadiene Styrene High Impact 0.4 0.9
ABS/PC Acrylonitrile-Butadiene Styrene/Polycarbonate 0.5 0.7
ABS/PC 20% GF Acrylonitrile-Butadiene Styrene/Polycarbonate 20% glass fiber 0.2 0.3
ABS/PC FR Acrylonitrile-Butadiene Styrene/Polycarbonate flame retardant 0.3 0.6
Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (High Flow) Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (High Flow) 0.8 1
Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (Standard Flow) Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (Standard Flow) 0.8 1
Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (High Flow) Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (High Flow) 1 1.2
Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (Standard Flow) Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (Standard Flow) 1 1.2
Amorphous TPI, Moderate Heat, Transparent Amorphous TPI, Moderate Heat, Transparent 0.5 0.7
Amorphous TPI, Moderate Heat, Transparent (Food Contact Approved) Amorphous TPI, Moderate Heat, Transparent (Food Contact Approved) 0.5 0.7
Amorphous TPI, Moderate Heat, Transparent (Mold Release grade) Amorphous TPI, Moderate Heat, Transparent (Mold Release grade) 0.5 0.7
Amorphous TPI, Moderate Heat, Transparent (Powder form) Amorphous TPI, Moderate Heat, Transparent (Powder form) 0.5 0.7
ASA Acrylonitrile Styrene Acrylate 0.4 0.7
ASA/PC Acrylonitrile Styrene Acrylate/Polycarbonate 0.3 0.7
ASA/PC FR Acrylonitrile Styrene Acrylate/Polycarbonate flame retardant 0.4 0.8
ASA/PVC Acrylonitrile Styrene Acrylate/Polyvinyl Chloride 0.3 0.7
CA – Cellulose Acetate Cellulose Acetate 0.3 1
CAB – Cellulose Acetate Butyrate Cellulose Acetate Butyrate 0.2 0.9
Celllulose Diacetate- Pearlescent Films Celllulose Diacetate- Pearlescent Films 1 1.5
Celllulose Diacetate-Matt Film Celllulose Diacetate-Matt Film 1 1.5
CP – Cellulose Proprionate Cellulose Proprionate 0.1 0.9
CPVC – Chlorinated Polyvinyl Chloride CPVC – Chlorinated Polyvinyl Chloride 0.3 0.7
ETFE Ethylene Tetrafluoroethylene 3 4
EVA Ethylene Vinyl Acetate 0.4 3.5
FEP Fluorinated Ethylene Propylene 3 6
HDPE – High Density Polyethylene HDPE – High Density Polyethylene 1.5 4
HIPS – High Impact Polystyrene HIPS – High Impact Polystyrene 0.2 0.8
HIPS FR V0 High Impact Polystyrene flame retardant V0 0.3 0.6
LCP Liquid Crystal Polymer 0.1 0.6
LCP CF Liquid Crystal Polymer carbon fiber 0.1 0.5
LCP GF Liquid Crystal Polymer glass fiber 0.1 0.4
LCP MINERAL Liquid Crystal Polymer mineral 0.1 0.5
LDPE – Low Density Polyethylene LDPE – Low Density Polyethylene 2 4
LLDPE – Linear Low Density Polyethylene LLDPE – Linear Low Density Polyethylene 2 2.5
MABS Transparent Acrylonitrile Butadiene Styrene 0.4 0.7
PA 11 30% Glass fiber reinforced Polyamide 11 30% Glass fiber reinforced 0.5 0.5
PA 11 conductive Polyamide 11 conductive 0.7 2
PA 11 flexible Polyamide 11 flexible 1.4 1.8
PA 11 rigid Polyamide 11 rigid 0.7 2
PA 12 conductive Polyamide 12 conductive 0.7 2
PA 12 fiber reinforced Polyamide 12 fiber reinforced 0.7 2
PA 12 flexible Polyamide 12 flexible 0.7 2
PA 12 glass filled Polyamide 12 glass filled 0.7 2
PA 12 rigid Polyamide 12 rigid 0.7 2
PA 46 Polyamide 46 1.5 2
PA 46 30% GF Polyamide 46 30% glass fiber 0.3 1.3
PA 6 Polyamide 6 0.5 1.5
PA 6-10 Polyamide 6-10 1 1.3
PA 66 Polyamide 6-6 0.7 3
PA 66 30% GF Polyamide 6-6 30% glass fiber 0.5 0.5
PA 66 30% mineral filled Polyamide 6-6 30% mineral filled 0.6 1
PA 66 IM 15-30% GF Polyamide 6-6 impact modified 15-30% glass fiber 0.2 0.6
PA 66 impact modified Polyamide 6-6 impact modified 1.2 3
PAI Polyamide-Imide 0.6 1
PAI 30% GF Polyamide-Imide 30% glass fiber 0.1 0.3
PAI low friction Polyamide-Imide low friction 0.1 0.5
PAN Polyacrylonitrile 0.2 0.5
PAR Polyarylate 0.9 1.2
PARA 30-60% GF Polyarylamide 30-60% glass fiber 0.1 0.4
PBT Polybutylene Terephthalate 0.5 2.2
PBT 30% GF Polybutylene Terephthalate 30% glass fiber 0.2 1
PC 20-40% GF Polycarbonate 20-40% glass fiber 0.1 0.5
PC 20-40% GF FR Polycarbonate 20-40% glass fiber flame retardant 0.1 0.5
PC high heat Polycarbonate high heat 0.7 1
PC/PBT Polycarbonate/Polybutylene Terephthalate blend 0.6 1.1
PCTFE Polymonochlorotrifluoroethylene 0.5 1.5
PE 30% GF Polyethylene 30% glass fiber 0.2 0.6
PEEK Polyetheretherketone 1.2 1.5
PEEK 30% CF Polyetheretherketone 30% carbon fiber 0 0.5
PEEK 30% GF Polyetheretherketone 30% glass fiber 0.4 0.8
PEI Polyetherimide 0.7 0.8
PEI 30% GF Polyetherimide 30% glass fiber 0.2 0.4
PEI mineral filled Polyetherimide mineral filled 0.5 0.7
PEKK– Low cristallinity grade Polyetherketoneketone– Low cristallinity grade 0.004 0.005
PESU Polyethersulfone 0.6 0.7
PESU 10-30% GF Polyethersulfone 10-30% glass fiber 0.2 0.3
PET Polyethylene Terephtalate 0.2 3
PET 30% GF Polyethylene Terephtalate 30% glass fiber 0.2 1
PET 30/35% GF Impact modified Polyethylene Terephtalate 30/35% glass fiber impact modified 0.2 0.9
PET G Polyethylene Terephtalate Glycol 0.2 1
PE-UHMW Polyethylene -Ultra High Molecular Weight 4 4
PFA Perfluoroalkoxy 3 5
PHB – Polyhydroxybutyrate Polyhydroxybutyrate 1.2 1.6
PI Polyimide 0.2 1.2
PLA-injection molding Polylactide-injection molding 0.3 0.5
PMMA Polymethylmethacrylate (Acrylic) 0.2 0.8
PMMA high heat Polymethylmethacrylate (Acrylic) high heat 0.2 0.8
PMMA Impact modified Polymethylmethacrylate (Acrylic) impact modified 0.2 0.8
PMP Polymethylpentene 1.6 2.1
PMP 30% GF Polymethylpentene 30% glass fiber 0.3 1.2
PMP mineral filled Polymethylpentene mineral filled 1.4 1.7
Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 30 % Filler by Weight Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 30 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 40 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight 0.3 0.3
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight 0.3 0.3
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 30 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 30 % Filler by Weight 0.4 0.4
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight 0.3 0.3
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight 0.3 0.3
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight 0.3 0.3
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight 0.3 0.3
POM Polyoxymethylene (acetal) 1.8 2.5
POM impact modified Polyoxymethylene (acetal) impact modified 1 2.5
POM low friction Polyoxymethylene (acetal) low friction 1.8 3
POM mineral filled Polyoxymethylene (acetal) mineral filled 1.5 2
PP 10-20% GF Polypropylene 10-20% glass fiber 0.3 1
PP 10-40% mineral filled Polypropylene 10-40% mineral filled 0.6 1.4
PP 10-40% TALC Polypropylene 10-40% talc 0.9 1.4
PP 30-40% GF Polypropylene 30-40% glass fiber 0.1 1
PP copo Polypropylene copolymer 2 3
PP homo Polypropylene homopolymer 1 3
PP impact modified Polypropylene impact modified 2 3
PPA Polyphthalamide 1.5 2.2
PPA – 30% mineral Polyphthalamide– 30% mineral 1 1.2
PPA – 33% glass fiber Polyphthalamide – 33% glass fiber 0.5 0.7
PPA – 33% glass fiber – high flow Polyphthalamide– 33% glass fiber – high flow 0.74 0.76
PPA – 45% glass fiber Polyphthalamide– 45% glass fiber 0.1 0.3
PPE Polyphenylene Ether 0.5 0.8
PPE 30% GF Polyphenylene Ether 30% glass fiber 0.1 0.4
PPE FR Polyphenylene Ether flame retardant 0.6 1
PPE impact modified Polyphenylene Ether impact modified 0.6 1
PPE mineral filled Polyphenylene Ether mineral filled 0.3 0.7
PPS Polyphenylene Sulfide 0.6 1.4
PPS 20-30% GF Polyphenylene Sulfide 20-30% glass fiber 0.2 0.5
PPS 40% GF Polyphenylene Sulfide 40% glass fiber 0.2 0.5
PPS conductive Polyphenylene Sulfide conductive 0.3 1
PPS GF & mineral Polyphenylene Sulfide glass fiber & mineral 0.3 0.7
PS 30 % GF Polystyrene 30% glass fiber 0.2 0.2
PS crystal Polystyrene crystal 0.1 0.7
PS high heat Polystyrene high heat 0.2 0.7
PSU Polysulfone 0.7 0.7
PSU 30% GF Polysulfone 30% glass fiber 0.1 0.6
PSU mineral filled Polysulfone mineral filled 0.4 0.5
PTFE Polytetrafluoroethylene Previous :
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