Shipping Sack Abbreviations


AF&PA: American Forest and Paper Association

AL: Aluminum

ANK: All Natural Kraft

AOP: All Over Perforations

AOPH: All Over Pinhole Perforations

ASCS: Agricultural Stabilization and Conservation Service

ASTM: American Society for Testing and Materials

BK: Bleached kraft

BL: Bleached white

BON: Biaxially Oriented Nylon

BOPP: Biaxially Oriented Polypropylene

BTB: Bottom Fold to Back

BTF: Bottom Fold to Face

BW: Basis Weight

C/L: Carload (rail)

cc: Cubic Centimeter

CD: Cross Machine Direction

Coex: Coextrusion

COF: Coefficient of Friction

C1S: Clay coated one side

C2S: Clay coated two sides

DOT: US Department of Transportation

DPI: Dots per inch

EVA: Ethylene Vinyl Acetate

EXT: Extensible

FBL: Finished Bag Length

FC: Flush Cut

FCS: Freight Classification Stamp

FDA: United States Food and Drug Administration

FFS: Form Fill and Seal

FIBC: Flexible Intermediate Bulk Containers

FST: Flat Sewn Tube (open mouth)

FSV: Flat Sewn Valve (flat tube)

FT: Flat Tube

FW: Face Width

GP: Greaseproof

GW: Gusset Width

HDPE: High Density Polyethylene

HFFS: Horizontal Form Fill and Seal

Hr: Hour

IMP: Impregnated

IRT: Insect Resistant Treatment

LCL: Less than Carload (rail)

LDPE:  Low Density Polyethylene

LLDPE: Linear Low Density Polyethylene

LLH: Lower Left Hand, viewed with the printing right side up

LPI: Lines per inch

LRH: Lower Right Hand, viewed with the printing right side up

LS: Low Stretch

LTL: Less Than Truck Load

M/C: Machine Creped

MD: Machine Direction

MDPE: Medium Density Polyethylene

MET: Metallized

MF: Machine Finish

MG: Machine Glazed

Mil: 1/1000th of an inch

MVTR: Moisture Vapor Transmission Rate (same as WVTR)


MWK: Multiwall Kraft

N: Nylon

NK: Natural Kraft Paper

NMFC: National Motor Freight Classifications (truck)

OPP: Oriented Polypropylene

OTR: Oxygen Transmission Rate

P/S: Pinch Seal

PA: Polyamid (Nylon)

PB-FC: Pinch Bottom – Flush Cut

PBOM: Pinch Bottom Open Mouth Bag

PBV: Pinch Bottom Valve Bag

PE: Polyethylene

PET:  Polyester

PHP: Pinhole Perforations

POM: Pasted Open Mouth – Satchel Bottom

PP: Polypropylene

PSOS: Pasted Open Mouth – SOS

PSSMA: Paper Shipping Sack Manufacturers Association

PVDC: Polyvinylidene Chloride

PVE: Pasted Valve Bag

PVE-TIS: Pasted Valve – Tuck In Sleeve

PVR: Pasted Valve Regular (flush cut tube)

PVSE: Pasted Valve Stepped End

RFO: Rough Finish Out

SB: Satchel Bottom

SBL: Semi-Bleached

SEPV: Stepped-End Pasted Valve

SG: Staggered Gussets

SOM: Sewn Open Mouth Bag

SOMF: Sewn Open Mouth Flat Tube

SOS: Automatic or Self Opening Sack or Self Opening Square

SPK: Super Performance Kraft or Flakt dried kraft

SPS: Sift Proof Square (another term for PBOM)

SPX: Extensible SPK from Tolko Manitoba, Inc.

Sq: In Square Inches

SV-TIS: Sewn Valve – Tuck In Sleeve

SV: Sewn Valve

TAPPI: Technical Association of the Pulp & Paper Industry

TEA: Tensile Energy Absorption

TIS: Tuck-in Sleeve

TL: Truck Load

TL: Tube Length

TOS: Tape Over Sewing

UFC: Uniform Freight Classification (rail)

ULH: Upper Left Hand, viewed with the printing right side up

URH: Upper Right Hand, viewed with the printing right side up

USDA: United States Department of Agriculture

UU-S-48: Federal Specification for Multiwall Bags

UVP: Under Valve Perforations

VFFS: Vertical Form Fill and Seal

VTB: Valve Folded to Back

VTF: Valve Folded to Face

VVH: Valve Vent Holes

WPP: Woven Polypropylene

WS: Wet Strength Paper

WVTR: Water Vapor Transmission Rate (same as MVTR)

XK: Extensible Kraft