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We put together a glossary of terms that you can refer to in the event you don't understand what a certain product provides.  We've listed them alphabetically.

- Adhesion is the bond produced by contact between a pressure sensitive adhesive and surface.

ADHESION BUILD-UP - Adhesion build up is an increase in the peel adhesion value of a pressure sensitive tape after it has been allowed to dwell to the applied surface.

ADHESION TO BACKING - Adhesion to backing is the bond produced by contact between a pressure sensitive adhesive and the tape backing when one piece of tape is applied to the back of another piece of tape.

ADHESIVE DEPOSIT - Adhesive deposit is an adhesive, which is pulled away from the tape and remains on surface to which the tape was applied.

ADHESIVE TRANSFER - is the transfer of adhesive from its normal position on the tape to the surface to which the tape was attached, either during unwind or removal.

BACKING - A Backing is the relatively thin flexible material to which the adhesive is applied; Theoretically, any material, which is reasonably flat, relatively thin and flexible could be used as a tape backing.

BI-DIRECTIONAL - Bi-Directional is related to strapping tapes, in which the reinforcing material consists of filaments in both the length and cross directions, usually woven cloth.

BURSTING STRENGTH - Bursting Strength is the ability of a tape to resist damage, when force is evenly applied perpendicularly to the surface of the tape.

CARRIER - A Carries is sometimes used to refer to the backing material, particularly in double-faced tapes.

CELLO - Cello indicates an item that is indivudually wrapped.  Cello items can be sold as bulk items, but the item is still wrapped.

CELLO/Label - Same as Cello, but it is packaged and labeled for retail.

COATED CLOTH - A coated cloth is a Fabric with a rubber or plastic back coating to give increased moisture resistance or longer wear.

(Cohesive strength, internal bond) - Cohesion is the ability of the adhesive to resist splitting. Good cohesion is necessary for clean removal.

COLD FLOW - Old flow is the tendency of a pressure sensitive adhesive to act like a heavy viscous liquid over a period of time. Such phenomena as oozing and increase in adhesion, are one result of this characteristic.

COLOR - Color refers to the particular color of a tape, when looking at the backing, regardless of the color of the adhesive.

COLOUR STABILITY - Color Stability is the ability of a tape to retain its original color, particularly when exposed to light.

CONFOMABILITY - Conformability is the ability of a tape to fit snugly or make essentially complete contact with the surface of an irregular object without creasing or folding.

CREPE - Crepe is a paper which has small "folds' in it, giving it high stretch and conformability.

CROSS-LINKED - Cross linked refers to the development of three-dimensional structure in an adhesive which is activated normally by heat. An improvement in shear resistance, high temperature resistance and oil or solvent will normally result.

CUPPING - Cupping is a slightly U-shaped deformation of the tape (at right angles to the length).

CURLING - Curling refers to the tendency of a tape to curl back on itself when unwound from the roll.

DELAMINATION - Delamination is a separation or splitting of the tape such as separation of the backing into two distinct layers, separation between laminations of a tape consisting of more than one and backing, or the separation between filaments and backing of a filaments reinforced tape.

DIELECTRIC STRENGTH - Dielectric strength is the voltage which a tape will withstand without allowing passage of the current through it.

DOUBLE-COATED - Double Coated refers to a adhesive that is applied on both sides of the backing, which serves principally as a carrier for the adhesive.

ELASTIC MEMORY - Elastic memory refers to the tendency of some tape backings to attempt to return to their original length after being elongated.

ELECTROLYTIC/ CORROSION FACTOR - Electrolytic / Correction Factors refers to a measure of the tape's corrosive effect on a metal conductor. This is particularly important in selection of tapes for use as electrical insulation.

ELONGATION (Stretch, ultimate elongation) - Elongation refers to the distance a tape will stretch  lengthwise before breaking, expressed as a percentage of original length. Elongation is not necessarily an indication of conformability.

FEATHERING - Feathering refers to a jagged, irregular paint line frequently characterized by small "feathers" of top-coat projecting into the masked area.

FILM - Film is a uniform homogeneous, non-fibrous synthetic webs.

FISHEYES - Fisheyes is a relatively small deformations (pock-marks) in the adhesive caused by the entrapment of air between layers in the roll, it is not an indication of quality defect.

FLAKING - Flaking is a condition sometimes occurring during removal of masking tape in which flakes or particles of paint break off the tape backing.

FLATBACK - Flatback is a smooth paper backing.

FLUOROCARBON FILMS - Fluorocarbon is a film with very high and low temperature limits, excellent electrical characteristics, and a very slippery, non-sticking surface.

FLUTING - Fluting refers to a distortion of a roll of tape such that layers no longer from a circle.

FOAM - Foam is a soft cushioned material formed by creating bubbles in base materials, such as natural or synthetic rubbers, or other elastomeric materials.

GAPING - Gaping refers to openings between layers of tape within a roll.

HEAT RESISTANCE - Heat resistance is the ability of a tape to withstand exposure to specified temperatures after application to a surface. Clean removal after exposure may or may not be important depending on the intended function of the type of adhesive.

HIGH SPEED UNWIND - High Speed Unwind is the ability of a tape to withstand exposure to specified temperatures after application to a surface. Clean removal after exposure may or may not be important depending on the intended function of the tape and the type of adhesive.

HOLDING POWER (Sheer adhesion) - Holding power refers to the ability of a tape to resist the static forces applied in the same plane as the backing. Usually expressed in time required for a given weight to cause a given amount of tape to come loose from a vertical panel.

IMPACT RESISTANCE (Shock resistance) - Impact resistance refers to the ability of a tape to resist sudden pull or Shocks as may some times be encountered by packages in transit.  

KRAFT - Kraft is a sulfate wood pulp paper.

LAMINATION - Lamination refers to a combination of two or more similar or dissimilar materials which function as one backing, e.g. acetate and tissue in acetate fiber tapes.

MIGRATION - Migration refers to the movement, over a long period of time, of an ingredient from one component to another when the two are in surface contact. May occur between a tape and the surface to which it is applied. Some plastic films and foams contain plasticizers which are apt to migrate into the tape adhesive, causing the adhesives to soften.

MULTIPLE COMPONENTS ADHESIVE - Multiple Components Adhesive is a pressure sensitive adhesive containing one or more elastomers, combined with resins and other components which impart tack, - adhesion and other necessary properties.

MWI - Movers Warehouse, Inc.  MWI is our short name.

OFF-CORE - Off Core are layers of tape are incorrect alignment, but tape is displaced sideways on core.

OFFSETTING - Off-Setting occurs when a printed tape is unwound and some of the printing ink is picked off by the adhesive or migrates into the adhesive. It is effect a delaminating of the ink.

ONE COMPONENT ADHESIVE- One Component Adhesive is a pressure sensitive adhesive in which all of the necessary properties are derived from a single uniquely designed synthetic polymer.

OOZING - Oozing is a "squeezing out" of the adhesive from under the backing.  The edges of the roll become tacky.

PEEL ADHESION - Peel Adhesion refers to the force required to break the bond between a tape and the surface to which it is applied. Usually measured by peeling back the tape at 180 degrees or sometimes at 90 degrees in the case of certain backings, and expressed in ounces per inch width.

PINHOLE - Pinhole refers to a very small hole which may permit the passage of light, moisture or electrical current.

PRESSURE SENSITIVE - Pressure Sensitive is a term commonly used to designate a distinct category of adhesive tapes and adhesives which in dry (solvent free) form are aggressively and permanently tacky at room temperature and firmly adhere to a variety of dissimilar surfaces upon mere contact without the need of more than finger or hand pressure.  They require no activation by water, solvent or heat in order to exert a strong adhesive holding force toward such materials as paper, plastic, glass, wood, cement and metals.  They require no activation by water, solvent or heat  in order  to exert a strong adhesive holding force toward such materials as paper, plastic, glass, wood, cement and metals.  They have a sufficiently cohesive holding and elastic nature so that, despite their aggressive tackiness, they can be handled with the fingers and removed from smooth surfaces without leaving a residue.  General trade usage by leading tape manufactures does not sanction extension of the term "pressure sensitive" to embrace tapes and adhesives merely because they are sticky (e.g. fly-papers), or merely because they adhere or cohere.

PRESSURE SENSITIVETAPE - Pressure Sensitive tape refers to a combination of pressure sensitive adhesive with a backing.

PRIMING (TIE COAT) - Priming refers to coating the backing on the adhesive side with a thin layer of adhesive-like material which serves as a bonding agent and the backing.

PRINTABILITY - Print-ability is the ability of a tape to accept and hold a printed legend, and especially to resist offset of printing when rewound into a roll after printing.

QUICK TACK (Tack, finger tack, initial adhesion, wet grab) - Quick Tack refers to the property of a pressure sensitive, which allows it to adhere to a surface under very light pressure.  It is determined by the ability of the adhesive to quickly wet the surface contacted.

REINFORCEMENTS - Reinforcements refers to a material added to a tape to provide additional strength.

RELEASE COATING (Easy unwind treatment) - Release Coating refers to a coating applied to the backing on the side opposite the adhesive on unwind and the resulting tape will have little or no ability to stick.

RELEASE COAT TRANSFER - Release Coat Transfers refers to particles of the release coat sticking to the adhesive on unwind and the resulting the tape will have little or no ability to stick.

RELEASE LINER - Release Liner is a web or sheet of material covering the adhesive side of a tape.  It is removed prior to application.  Most frequently found on  double-coated tapes and label stock.

RIDGING - Ridging is a mound-like swelling on the outer layers of a roll, lengthwise to the tape.  It is removed prior to application.  Most frequently found on double-coated tapes and label stock.

SATURATION (Impregnation) - Saturation refers to adding materials (saturant) to the backing for improvement of physical properties, and resistance to various deleterious environments.  The backing of paper tapes, for instance, may actually contain as much as 50% by weight of a rubber-based imp regnant.

SILICONE - Silicone refers to a unique polymer system which can be a very effective release  coating, or pressure sensitive adhesive capable of functioning effectively at extreme temperatures.

SINGLE-FACED - Single Faced refers to a adhesive that is applied to one side of the backing only.  Most pressure sensitive tapes are of this type.

SMOOTHNESS - Smoothness refers to the relative flatness of the tape backing.

STORAGE STABILITY (Roll-aging resistance) - Storage stability refers to the ability of a tape to retain its original properties after storage.

STRINGINESS - Stringiness is a condition of adhesive in which it feels very soft and mushy, and on close examination relatively long "legs" or "strings' of adhesive can be pulled out of the adhesive.

TACKY - Tacky refers to the condition of the adhesive when it feels sticky or high adhesive.  Sometimes used to express the idea of pressure-sensitivity.

TEAR RESISTANCE - Tear resistance refers to the ability of a tape to resist tearing.

TELESCOPING - Telescoping is a sideways sliding of the tape layers, one over the other, such that the roll looks like a funnel or a telescope.

TENSILE STRENGTH (Breaking strength) - Tensile Strength refers to the force required to break a piece of tape pulling on opposite ends of the piece.

  1. Machine Direction Tensile - Tensile strength measured parallel to the length of the tape.  Unless otherwise specified, tensile strengths are measured in machine direction.
  2. Cross Direction Tensile  - Tensile strength measured at right angles to the length.
  3. Wet Tensile - Tensile strength of tape, which has been kept wet for a specified period of time.  Measure ability of tape to function satisfactorily when exposed to moisture.

UNWIND - Unwind refers to the force required to remove tape from the roll.

UNWIND ADHESION - The force required to remove tape from the roll.

VOID - VOID is a bare uncoated area on either the adhesive or release coated side of the tape. 
Air-Flow: Air-Flow is used in agricultural product packing and has die cut holes to reduce spoilage and ensure even cooling. Air-Flow replaces pallet netting and gives users all the advantages of conventional LLDPE Pallet Stretch Wrap, which include strength, load holding and ease of use.
Ambidextrous Control: Separate right/left hand braking control which allows the operator to have total stretch control over 100% of the surface area of the stretch film while wrapping.
Angel Hair: Thin strands of stretch film on the edges of stretch film rolls caused by improper bologna slicing.
Auto Bander: Jumbo rolls of stretch film for automatic bundling equipment.
Banding/Bundling: Wrapping several items together with plastic stretch wrap.
Barricade Tape: Non-adhesive warning films printed with custom logos.
Base Lock: The thick layer of film produced by holding the MWI handwrappers at approximately a 45 degree angle to the floor. This wrap helps lock the boxes to the skid to prevent shifting.
Blooming: The time period that the Poly Iso Butylene takes to migrate to the surface of the stretch film. Once this happens high cling films are at their peak of perfection.
Blown Film: The fabrication of a film by continuously pumping the polymer through a circular die and filling the tube with air. The volume of air contained within the tube stretches the tube out to the desired width and, in conjunction with the rate at which it is bring pulled away from the die, the desired thickness is created.
Bologna Slicing:

A film slitting process in which a rotating double edge blade cuts a roll of film while the roll is spinning. This is the quickest way for slitting film. However, the quickness can cause the film to melt in some places, resulting in the film hanging up and tearing it, as it is unwound off the roll.

Braking Tension: The tension applied to stretch film by pulling and squeezing the patented MWI hand brakes (See Finger Tip Control).
Bulk heading: A shipping technique that combines both unitization and stabilization. The pallet loads nearest the back door of a truck are unitized while the pallet loads towards the front of the trailer are stabilized.
Bundling: Banding articles together into distinct and separate units with plastic stretch film.
Cast Film: The fabrication of a film by continuously pumping the polymer through a straight slot die, then chilling this hot plastic immediately through contacts with a chilled roll. Film width is determined by how fast the chill roll pulls the film away from the die.
Cling: The characteristic of stretch film which makes it stick to itself.
Cross Top Wrapping: A unitization technique which covers the top of a load. Not only does cross top wrapping protect the tops of pallet loads but it also helps to pull the load together as it settles during shipment.
Cube: The total area inside a truck trailer. The length times width times the height of the trailer is the cube space.
Dead Fold: Stretch film sticking to itself during wrapping without the use of any additional heat sealing (i.e. – PVC films used in food wrapping have high dead fold).
Die: A device used in extrusion processes to shape the extrudate.
Double Stacking: One pallet piled on top of another during shipping. All of MWI's products packaged four rolls per case are specially wrapped, using the techniques in this manual, to permit double stacking in shipment and storage.
Eco-Wrap: Micron Pallet Wrap. Stiffer and stronger than conventional hand wrap. Has a high resistance to stretch for superior load retention.
EVA (Ethylene Vinyl Acetate): A copolymer put in stretch film adding strength to ordinary polyethylene film.
Extruder: A machine that makes stretch film. It consists of a large steel barrel surrounded by heaters, which melt the plastic resin pellets. Inside of the barrel is a large screw to force the liquid plastic under pressure through a die to be made into plastic sheeting by either the cast or blown processes.
Film Supply: The amount of film on a MWI roll.
Fingertip Control: Stretch film tension control that is at the operator’s finger tips, providing the operator with control that can always be felt and adjusted instantaneously. When very little pressure is applied to the MWI handbrakes, the film can be stretched up to 25%. When an intermediate amount of pressure to applied to the hand brakes, the film can be stretched up to 50%. When firm finger tip pressure is applied to the hand brakes, then the film can be stretched up to 100% and more.
Five Sided Wrapping: Wrapping a pallet load’s four sides plus the top. The top of a pallet can be wrapped by using the cross top wrapping technique.
Flange: The extended lip of the hand brake that keeps the operator’s hand from sliding down and rubbing against the roll.
Flexible Hand Brakes: The key to fingertip control and MWI's patented braking system. Inside the hand brakes are specially designed wear pads that dissipate heat and provide the proper tensioning when squeezed for maximum film stretch. By squeezing them, the operator can get 50% to 100% or more stretch when he pulls the film. Not only do grips give the operator a feel of how much pressure he is applying to the film, but they protect his hands – keeping them from burning or blistering.
Floor Loading: A technique used for packing a truck in which pallets and stretch film are not used. Hand carrying (conveyors are frequently used) a load on a truck and shipping the load by leaving it on the trailer floor unprotected.
Gauge: The thickness of a film. 80 gauge film equates to .8 mil or .0008 inches.
Gauge Band: Thickness irregularity in films.
Gel: Small piece of undissolved resin causing imperfection in film.
HandyWrap: Pallet stretch wrap with disposable extended core handles.
High Density Load/Product: A load or product that is relatively heavy (i.e. – an engine block on a pallet).
Identi Film: Pallet stretch film in colors. Tinted films give protection from tampering and theft. Improves load appearance, product rotation.
Laundry Wraps: All purpose PVC over wrap for use in commercial laundries.
LDPE or PE (Low Density Polyethylene): A resin base for making stretch film. Even though LDPE is a relatively strong transparent film with good tensile strength it does not match the performance of the newer LLDPE.
Maximum Stretch: The ability of the film to stretch as far as it can without tearing.  MWI uses premium grade films that can stretch 100, 200 percent, and more.
Memory: After the MWI film is stretched to its maximum it will recover and form fit the load which has been wrapped (See recovery).
Mini-Bander: Similar to EZ-Bander banding film expect on 1 inch diameter cores for better wrapping control and ease of use in working environments.
Neck Down: The narrowing tendency of stretch film when being stretched or pulled.
PVC: Poly Vinyl Chloride. In film form, it is used as a meat or produce wrap as stretch film, and a high clarity shrink wrap for retail packaging.
Recovery: Stretch film trying to return back to its original form after it has been stretched. This action constantly pulls the load together since the stretch film tightly form-fits the load. Stretch wrapping continues to tighten the load as it settles during shipment, due to the recovery property, keeping the load safe and secure during shipment.
Securi-Wrap: Opaque pallet stretch film. Opaque film blocks UV rays from damaging products. Protects shipments during transit by not allowing contents to be seen.
Strong-Bow: Pre-stretched pallet wrap. Film has been stretched leaving better load retention and lighter weight rolls
Tacifier: A general term used to refer to cling additives in stretch film (see blooming, cling, poly isobutylene).
Tensile Strength: The maximum longitudinal stress that stretch film can take before it tears.
Top Sheeting: A protective covering put on the top of a load to protect the top from dust, dirt, and other objects that might damage the load.  MWI manufactures a top sheeting dispenser and top sheeting rolls for protecting tops of loads, open containers, etc.
Unitization: Wrapping techniques that protect a pallet load from top to bottom, making all packages in the load one single unit. These techniques are ideal for long distance hauls and less than truckload shipments. X-wrapping, Wrapping Low, and Cross Top Wrapping are wrapping techniques that promote the best unitization.
WrapNet: Netting pallet wrap. Knitted pallet wrap that hold load together but also allows air to circulated throughout the pallet.
Yield: The amount of stretch a film gets without interfering with the performance of other properties like tear and puncture resistance.
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