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Adhesive Manufacturing Technology
Adhesive manufacturing technology is a vast subject and its scope is widening day after day as innovative products are emerging day after day, numerous new systems have been developed in recent paste involving various raw materials to deliver better adhesive properties on various substrates , not only new products have developed in adhesives but also mechanism of action on various substrates has also improved or changed totally so the common definition of adhesive  as a material which is applied on two substrates to join them to resist separation has become general as adhesive not only join surfaces but are used to plug, stop leakage, join, fix, seal and coat , stich and laminate etc.  As on today we have various adhesive systems meant to work for various applications, on varied  substrates with different mechanism of action and with application procedures so  , we currently  classify adhesive(as per internet ) in fallowing ways, to have more clear picture of the whole scene,(note  here n means noun, adj. Means adjective, here

First classification of adhesives is divided according to their origin, therefore, we will have Natural Adhesives and Synthetic Adhesives.
Natural Adhesives: 

They are those adhesives that are produced or extracted from natural resources such as plants or animals, starch, casein glues or natural rubber are examples of natural adhesives.

Synthetic Adhesives: 

They are those that are not found in nature and are designed and manufactured by man, we can say that synthetic adhesives are adhesives laboratory.  

Synthetic adhesives are the most widely used adhesives in the various sectors that use these materials, because the mechanical, physical and chemical properties of these adhesives are far superior to natural adhesives.

Various adhesives available toda, can be classified, by the number of packages or components needed to produce the solidification or curing of the adhesive:

1-component adhesives - are those adhesives that are presented in a single container or package, such as moisture curing polyurethane adhesive, cyanoacrylates, silicones, moisture curing adhesives, modified silanes

2-component adhesives - are those adhesives whose components are separated into two different containers or packages, being necessary to mix them with the correct proportion to begin the process of solidification or curing, such as 2-component polyurethane, acrylates adhesives, epoxy 2 components.

Currently adhesives types available in market are also classified as:
By the structure and nature takes the adhesive polymer after curing:
Thermoplastic adhesives
Elastomer adhesives
Thermoset adhesives

Adhesive classification by the type of cure that occurs in the adhesive:
Physical curing adhesives, such as contact adhesives, psa adhesives (pressure sensitive adhesives) ...
Chemical curing adhesives, such as polyurethane, epoxy, acrylates adhesives...

By the mechanical properties of adhesives:
Elastic adhesives which have a high elongation before fracture occurs,
For example silicone adhesives, silane modified adhesives, 1-component polyurethane curing by moisture ...

Rigid adhesives which have high impact resistance but low elasticity, such as epoxy adhesives, anaerobic adhesives, one component polyurethane cuing by heat ...
By the kind of state which is the adhesive before applying:

Solids adhesives as hot melt adhesives

Liquids adhesives such as cyanoacrylates glues.

The classification most used to differentiate over the wide range of adhesives, is by the type of cure or solidification process that occurs in the adhesive:

Chemical curing adhesives
Poly-addition adhesives:
Epoxy adhesives
Polyurethanes adhesives
Silicones adhesives
Hot curing rubber adhesives

Polymerization adhesives:
Metacrylates adhesives
Cyanoacrylates like elfy , fevikwik, glue
Anaerobic adhesives
Unsaturated polyester adhesives
Acrylates curing radiation
Epoxy curing radiation

Poly-condensation adhesives:
Silicones
Silanes modified
Phenolic adhesives
Polyamides  
Physical curing adhesives
Hot melt adhesives
Solvent based adhesives
Waterborne adhesives
Contact adhesives
Dispersion adhesives
Plasti-sols adhesives
Pressure sensitive adhesives (psa)

For better understanding we have kept a glossary of common terms used by manufacturers, applicators, and technicians below:

A

Adhesive,N
a material which is adhesive resistant and applicable as a non-sticking surface coating; release agent.
Abrasion resistance,N
ability of a tape to withstand rubbing and still function satisfactorily.

Accelerated aging, N
a set of laboratory conditions designed to produce in a short time the results of normal aging (usual factors include temperature, light, oxygen, water, and other environments as needed).
Accelerator, N

an ingredient used in small amounts to speed up the action of a curing agent (sometimes used as a synonym for curing agent).
Related words  curing agent N 

Acceptance test, N

A test, or series of tests conducted by the procuring agency, or an agent thereof, upon receipt to determine whether an individual lot of materials conforms to the purchase order or contract or to determine the degree of uniformity of the material supplied by the vendor, or both. (compare preproduction test and qualification test.) (ASTM d 907-06)

Related words  preproduction test, N qualification test, N   Acetate (cellulose acetate), N

A transparent film which is used for various reasons in tape backings; the primary characteristic is that of being more moisture resistant than cellophane.

 Acrylic, adj, N
A synthetic polymer with excellent aging characteristics that can be used as either a single component adhesive, coating or saturant, depending upon composition.
ActivatorN
A material that speeds up normal curing mechanisms. 
Adhere, v
To cause two surfaces to be held together by adhesion. (ASTM d 907-06) 

AdherendN
 A body held to another body by an adhesive. Adherend preparation, n—see surface preparation. (ASTM d 907-06)
related words  surface preparation, N 
Adhesion (adhesive) failure, N

Rupture of an adhesive bond in which the separation appears visually to be at the adhesive/adherend interface. (ASTM d 907-06); in building construction, failure of the bond between the sealant, adhesive, or coating and the substrate surface. (ASTM c 717-07A); in pressure sensitive tapes, when performing a loop tack test, after the initial touch of the coated stock to the stainless steel plate, all of the adhesive remains on the coated stock. Compare cohesion failure.

Related words  cohesion (cohesive) failure, N 
Adhesion build-up, N
An increase in the peel adhesion value of a pressure-sensitive tape after it has been allowed to dwell on the applied surface. 

Adhesion promoter, N
 Asubstance used to improve bonding of the adhesive to the substrate. (compare coupling agent and primer.) Discussion—the adhesion promoter may be added to an adhesive formulation or applied to the substrate. (ASTM d 907-06)

Related words  coupling agent, n; primer, N 
Adhesion to backing, N
The bond produced by contact between a pressure-sensitive adhesive and the tape backing when one piece is applied to the back of another piece of the same tape. 

Adhesion, N
The state in which two surfaces are held together by interphase forces; mechanical adhesion, n—adhesion between surfaces in which the adhesive holds the parts together by interlocking action; specific adhesion, n—adhesion between surfaces which are held together by intermolecular forces of a chemical or physical nature. (ASTM d 907-06) 

Adhesive (N)
A substance capable of holding materials together by surface attachment. (see also glue, gum, mucilage, paste, resin, and sizing.) Discussion adhesive is the general term and includes among others cement, glue, mucilage, and paste. These terms are loosely used interchangeably. Various descriptive adjectives are applied to the term adhesive to indicate certain characteristics as follows: (1) physical form, that is, liquid adhesive, tape adhesive; (2) chemical type, that is, silicate adhesive, resin adhesive; (3) materials bonded, that is, paper adhesive, metal-plastic adhesive; (4) conditions of use, that is, hot-setting adhesive. (ASTM d 907-06)

Related words  cement, n; glue (archaic), n; gum, n; mucilage, n; paste, n; resin, n; sizing,N 

Adhesive deposit,N
a pressure-sensitive adhesive which is pulled away from the tape and remains on the surface to which the tape was applied. 

Adhesive dispersion, N
A two-phase system in which one phase is suspended in a liquid. (compare to emulsion.) (ASTM d 907-06)

related words  emulsion,N
Adhesive joint, N
The location at which two adherends are held together with adhesive. (ASTM d 907-06) 

Adhesive transfer, N
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. 

Adhesive, anaerobicN
see anaerobic adhesive.
Related words  anaerobic adhesive,N
Adhesive, assembly, N
see assembly adhesive.
Related words  assembly adhesive, N
Adhesive, bulk, N
see bulk adhesive.
Related words  bulk adhesive,N 
Adhesive, casein, N
see casein adhesive.

Related words  casein adhesiveN
Adhesive, cellular, N
see cellular adhesive.
Related words  cellular adhesive 

Adhesive, cold-setting, N
see cold-setting adhesive.
Related words  cold-setting adhesive, N

Adhesive, contact, N
see contact adhesive.
Related words  contact adhesive, N 
Adhesive, encapsulated, N

see encapsulated adhesive.
Related words  encapsulated adhesive, N 

Adhesive, film, N
see film adhesive.
Related words  film adhesive,N 

Adhesive, foamed,N 
see foamed adhesive.
Related words  foamed adhesive, N 
Adhesive, gap-filling, N
see gap-filling adhesive.
Related words  gap-filling adhesive, N
Adhesive, heat activated, N
see heat activated adhesive.
Related words  heat activated adhesive, N 
Adhesive, hot-melt, N
see hot-melt adhesive.
Related words  hot-melt adhesive, N 
Adhesive, hot-setting, N
see hot-setting adhesive.
Related words  hot-setting adhesive, N
Adhesive, intermediate-temperature-setting, N
see intermediate-temperature-setting adhesive.
Related words  intermediate-temperature-setting adhesive,N
Adhesive, mastic, N
see mastic adhesive.
Related words  mastic adhesive, N 
Adhesive, multiple-layer, N
see multiple-layer adhesive.
Related words  multiple-layer adhesive, N 
Adhesive, polyvinyl acetate emulsion, N
see polyvinyl acetate emulsion adhesive.
Related words  polyvinyl acetate emulsion adhesive, N
Adhesive, pressure-sensitive, N
see pressure-sensitive adhesive.
Related words  pressure-sensitive adhesive (psa), N
Adhesive, room-temperature-setting, N
see room-temperature-setting adhesive.
Related words  room-temperature-setting adhesive,N
Adhesive, separate application, N
see separate-application adhesive.
Related words  separate-application adhesive, N
 Adhesive, silicone, N
see silicone adhesive.
Related words  silicone adhesive,N 
Adhesive, solvent, N
see solvent adhesive.
Related words  solvent adhesive, N 
Adhesive, solvent-activated, N
see solvent-activated adhesive.
Related words  solvent-activated adhesive, N
 Adhesive, structural, N
see structural adhesive.
Related words  structural adhesive, N 
Adhesive, thermoplastic, N
see thermoplastic adhesive under thermoplastic.
Related words  thermoplastic, N, adj 
Adhesive, thermosetting, N
see thermosetting adhesive under thermoset.
Related words  thermoset, N, adj 
Adhesive, two-component, N
see two-component adhesive.
Related words  two-component adhesive, N 
Adhesive, urea-formaldehyde, N
see urea-formaldehyde adhesive.
Related words  urea-formaldehyde adhesive, N 
Adhesive, uv-curing, N
see uv curing adhesive under ultraviolet light.
Related words  ultraviolet light (uv), N
 Adhesive, warm-setting, N
see warm-setting adhesive.
Related words  warm-setting adhesive, N 
Adhesive-joint failure, N

The locus of fracture occurring in an adhesively-bonded joint resulting in a loss of load-carrying capability. (ASTM d 907-06) 
Adsorption, N
the action of a body in condensing and holding gases and other materials at its surface.
Aging, aging time, N
see joint conditioning time.

Related words  joint conditioning time 
Alligatoring, N
cracking of a surface into segments so that it resembles the hide of an alligator. 

Ambient temperature, N
temperature of the air surrounding the object under construction or test. 

Amylaceous, adj
pertaining to, or of the nature of, starch; starchy. (ASTM d 907-06)
 Anaerobic adhesive, N
An adhesive that is kept in the uncured state by oxygen, as in air, and that cures in the absence of oxygen when exposed to metal ions, especially copper or iron. (ASTM d 907-06) 

Apparent viscosityV
In non-newtonian behavior, the ratio of the shearing stress to the rate of shear of a fluid, given at the corresponding shearing stress. (ASTM d 907-06) 

Asphalt, n
a naturally occurring mineral pitch or bitumen.
Assembly (for adhesives), N
a group of materials or parts, including adhesive, placed together for bonding or which has been bonded together. (ASTM d 907-06) 

Assembly adhesive, N

an adhesive that can be used for bonding parts together, such as in the manufacture of a boat, airplane, furniture, and the like. Discussion—the term assembly adhesive is commonly used in the wood industry to distinguish such adhesives (formerly called joint glues) from those used in making plywood (sometimes called veneer glues). It is applied to adhesives used in fabricating finished structures or goods, or subassemblies thereof, as differentiated from adhesives used in the production of sheet materials for sale as such, for example, plywood or laminates. (ASTM d 907-06) 

Assembly time, n
the time interval between applying the adhesive on the substrate and the application of pressure, or heat, or both, to the assembly. Discussion—for assemblies involving multiple layers or parts, the assembly begins with applying the adhesive on the first substrate.

Closed assembly time, n - time interval between the closing together of substrates after the adhesive has been applied, and the application of pressure, heat, or both, to the assembly.
Open assembly time, n - time interval between applying adhesive on the substrates and closing them together before bonding. (ASTM d 907-06)

related words  closed assembly time, n; open assembly time, n
Assembly, n
see adhesive, assembly.
Related words  adhesive, assembly, N
 A-stage, N

An early stage in the preparation of certain thermosetting resins, in which the material is still soluble in certain liquids, and fusible. (ASTM d 907-06)

B

Back bedding, N
see bedding.
Related words  bedding, N
Back putty, N
see bedding.
Related words  bedding, N 
Backing, N

In pressure-sensitive tapes, a relatively thin flexible supporting material to which an adhesive is applied. Pressure sensitive adhesives are commonly backed with paper, plastic films, fabric, or metal foil while heat curing thermosetting adhesives are often supported on glass cloth backing. 

Back-up material, N
see sealant backing.
Related words  sealant backing
Bag molding, N

A method of molding or bonding involving the application of fluid pressure, usually by means of air, steam, water, or vacuum, to a flexible cover which, sometimes in conjunction with the rigid die, completely encloses the material to be bonded. (ASTM d 907-06)

Band aid sealant joint, N
use bridge sealant joint (preferred term). (ASTM c717-07A)
related words  bridge sealant joint, N 
Batch, N
The manufactured unit or a blend of two or more units of the same formulation and processing. (compare manufactured unit.) (ASTM d 907-06)
Related words  manufactured unit, N 
Batten plate, N
A thin metal plate separated by sealant beads to bridge poorly designed joints.
Bead, N
In building construction, in sealants and glazing, a strip of applied sealant, glazing compound, or putty. (ASTM c717-07A) 

Bed, N
see bedding.
Related words  bedding, N 
Bed, v
In building construction in glazing, to apply a bead of sealant between a lite of glass or a panel and the stationary stops or sight bars of the sash or frame. (ASTM c717-07A) 
Bedding, N
In building construction in glazing, a bead of sealant applied between a lite of glass or a panel and the stationary stop or sight bar of the sash or frame. It is usually the first bead to be applied when setting glass or panels. (ASTM c717-07A)

 Bicellular sealant backing, N

a flexible and very compressible extruded shape (usually cylindrical), with a surface skin, that is composed of both open and closed cell material. (ASTM c717-07A) 

Bi-directional, adj

Related to strapping tapes, in which the reinforcing material consists of filaments in both strength and cross directions, usually a woven cloth. 

Binder, N
In adhesive compounds , a component of an adhesive composition that is primarily responsible for its mechanical strength and adhesion. (ASTM d 907-06) 

Birefringence, N
The refraction of light in two slightly different directions to form two rays; the phenomenon can be used to locate stress in a transparent material. 

Bite, N
In building construction in glazing, the effective structural contact dimension of a structural sealant. (ASTM c717-07A)

click here for figure. 

Bleaching, NA
n erroneous term used to denote a corrosion of the surface under a tape which has remained the original surface color while the surround¬ing surface area has discolored.

 Bleeding, N
Penetration through the tape of a coloring liquid (paint, etc.) Onto the surface to which the tape is applied. 

Blister, N
An elevation of the surface of varied contour and dimensions, with a void beneath it. (ASTM d 907-06) discussion---a blister may be caused by: insufficient adhesive; inadequate curing time, temperature, or pressure; trapped air, water, or solvent vapor.

Blocked curing-agent, N

a curing or hardening agent temporarily rendered unreactive, which can be reactivated as desired by physical or chemical means. (ASTM d 907-06) 

Blocking, N

An undesired adhesion between touching layers of a material, such as occurs under moderate pressure during storage or use. (ASTM d 907-06) 

Bloom, N
In building construction, a substance formed by blooming. (ASTM c717-07A) 

Blooming, v
In building construction, movement or diffusion of a component such as a plasticizer, monomer, unreacted polymer or other formulation ingredient to a sealant surface. (ASTM c717-07A) 

Bond breaker, N
In building construction, a material to prevent adhesion at a designated interface. (ASTM c717-07A) 

Bond durability, N
Test cycle, as described in ASTM c-920, for measuring the bond strength after repeated weather and extension cycling. 

Bond strength, n
The unit load applied to tension, compression, flexure, peel, impact, cleavage, or shear, required to break an adhesive assembly with failure occurring in or near the plane of the bond. (see also adhesion and bond.) Discussion— the term adherence is frequently used in place of bond strength.

Dry strength, n—the strength of an adhesive joint determined immediately after drying under specified conditions or after a period of conditioning in a standard laboratory atmosphere.

Wet strength, n—the strength of an adhesive joint determined immediately after removal from a liquid in which it has been immersed under specified conditions of time, temperature, and pressure. Discussion—the term is commonly used alone to designate strength after immersion in water. In latex adhesives the term is also used to describe the joint strength when the adherends are brought together with the adhesive still in the wet state. (ASTM d 907-06)

Related words  adhesion, N; bond, N 

Bond, N
The attachment between an adhesive and an adherend.

Edge joint, n—in wood bonding, a type of laminate joint made by bonding adherends edge-to-edge with grain directions parallel to form wider stock.
Face joint, n—in wood bonding, a type of laminate joint made by bonding adherends face-to-face with grain directions parallel to form thicker stock.
Laminate joint, n—in wood bonding, a joint made by bonding layers of adherends face-to-face or edge-to-edge to form thicker or wider stock. (ASTM d 907-06)

Bond, v
To join adherends by means of an adhesive. (ASTM d 907-06)

Bondline, N
The layer of adhesive which attaches two adherends. (see interphase.) (ASTM d 907-06)

 Bridge sealant joint, N
In building construction, a joint where sealant is applied over the joint to the face of substrates that are in approximately the same plane.  Discussion—not to be confused with joints in bridges. (ASTM c717-07A)

click here for figure.
B-stage, N
An intermediate stage in the reaction of certain thermosetting resins in which the material swells when in contact with certain liquids and softens when heated, but may not entirely dissolve or fuse. (ASTM d 907-06) 
Building seal, N
see seal.
Related words  seal, N 
Built-up laminated wood, N
see built-up laminated wood under wood laminates.
Related words  wood laminates, N
Bulk adherend, N
as related to interphase, the adherend, unaltered by the adhesive. (compare to bulk adhesive.) (ASTM d 907-06)
related words  bulk adhesive,N 
Bulk adhesive, N
as related to interphase, the adhesive, unaltered by the adherend. (compare to bulk adherend.) (ASTM d 907-06)
related words  bulk adherend, N 
Bulk compounds,N
any sealant or caulk that has no defined shape and is stored in a container. 
Bursting strength, N
the ability of a tape to resist damage when force is evenly applied perpendicularly to the surface of the tape.
Butt glazing, N
in building construction, a glazing system wherein butt joints are formed between lites and filled with a glazing sealant. (ASTM c717-07A) 
Butt joint, N
see butt sealant joint.
Related words  butt sealant joint, N 
Butt sealant joint, N
In building construction, a joint where sealant is applied within the joint between approximately parallel substrate surfaces that are face-to-edge or edge-to-edge. (ASTM c717-07A)

click here for figure. C
Cap bead, N
a bead placed above a gasket in a glazing design. 
Carbon black, N
finely divided carbon used as a reinforcing filler in sealants. 
Carrier, N
sometimes used to refer to the backing material, particularly in double-faced tapes. 
Casein adhesive, N

An aqueous colloidal dispersion of casein that may be prepared with or without heat, may contain modifiers, inhibitors, and secondary binders to provide specific adhesive properties, and includes a subclass, usually identified as casein glue, that is based on a dry blend of casein, lime, and sodium salts, mixed with water and prepared without heat. (ASTM d 907-06) 

catalyst, N

a substance that initiates or changes the rate of chemical reaction, but is not consumed or changed by the reaction. (see also hardener.) (compare inhibitor.) (ASTM d 907-06)

related words  hardener, n; inhibitor, N
caul, N
A sheet of material employed singly or in pairs in hot or cold pressing of assemblies being bonded.

Discussion—a caul is used to protect either the faces of the assembly or the press platens, or both, against marring and staining to prevent sticking; to facilitate press loading; to impart a desired surface texture or finish; and to provide uniform pressure distribution.

Discussion—a caul may be made of any suitable material such as aluminum, stainless steel, hardboard, fiberboard, or plastic; the length and width dimensions being generally the same as those of the plates of the press where it is used. (ASTM d 907-06)

caulk, N
see sealant.
Related words  sealant (N)
 caulk, v
in building construction, to install or apply a sealant across or into a joint, crack, or crevice.
Caulking compound, N
see sealant.
Related words  sealant (N) 
caulking, N
see sealant.
Related words  sealant (N) 
cell, N
a single small cavity surrounded partially or completely by walls. (ASTM c 717-07A) 
cellophane (regenerated cellulose), N
a thin trans¬parent film manufactured from wood pulp. 
Cellular adhesive
see foamed adhesive.
Related words  foamed adhesive, N 
cellular material, N
a generic term for materials containing many cells (either open, closed, or both) dispersed through the mass. (ASTM c717-07A) 
cement, N
see discussion under adhesive.
Related words  adhesive (N) 
cement, v
see bond, v.
Related words  bond, v
 chain stopper, N
A material added during the polymerization process to terminate or control the degree of the reaction. This could result in soft sealants, or higher elongation. 

Chalk, N

in building construction, a powder formed by chalking. Discussion—the powder is not necessarily white. (ASTM c717-07A)

 chalking, v

in building construction, formation of a powder on the surface of a sealant that is caused by the disintegration of the polymer or binding medium due to weathering. Discussion—chalk on a light color sealant is often white, however a darker color can also exhibit chalking. (ASTM c717-07A)

 channel glazing, N

the method of glazing in which lites are set in a channel formed by two stops (ASTM c717-07A)

click here for figure. 

Chemical cure, N

curing by a chemical reaction. Usually involves the cross-linking of a polymer. 

Cleavage strength, N

the force per unit width of bond line required to produce progressive separation by wedge or other crack-opening type action of two adherends. (ASTM d 907-06) 

cleavage, N

in an adhesively bonded joint, a separation in the joint caused by wedge or other crack-opening type action. (ASTM d 907-06) 

cleavage-peel strength, N

the force per unit width of bondline required to produce progressive separation by wedge or other crack-opening type action of two adherends where one or both undergo significant bending. (ASTM d 907-06)

 closed assembly time, N

the time between the assembling of adhesive-coated surfaces and the application of heat or pressure, or both, to set the adhesive. (ASTM d 907-06)
closed cell material, N
a cellular material in which substantially all cells in the mass are closed cells. (ASTM c 717-07A
closed cell sealant backing, N
In building construction, a flexible and somewhat compressible extruded shape (usually cylindrical), with a surface skin, that is composed of closed cell material. (ASTM c717-07A) 
closed cell, N
a cell totally enclosed by its walls and hence not interconnecting with other cells. (ASTM c717-07A) 
coated cloth, N
fabric with a rubber or plastic back coating to give increased moisture resistance and longer wear.
 Cohesion (cohesive) failure, N

rupture of a bonded assembly in which the separation appears visually to be in the adhesive or the adherend. (ASTM d 907-06); in building construction, failure characterized by rupture within the sealant, adhesive, or coating. (ASTM c 717-07A); in pressure sensitive tapes, when the adhesive is left on both the substrate that it was coated to and the substrate that it comes into contact with, after it is removed from that substrate. For example, when performing a loop tack, after the initial touch of the coated stock to the stainless steel plate, the adhesive is left on both the coated stock and the stainless steel plate. See adhesion (adhesive) failure, n.

Related words  adhesion (adhesive) failure, N 
cohesion, N
The state in which the constituents of a mass of material are held together by chemical and physical forces. (ASTM d 907-06); the ability of the adhesive or sealant to resist splitting.
Cohesive blocking, N
see blocking.
Related words  blocking, N
cold flow
see creep.
Related words  creep, N
cold pressing, N
a bonding operation in which an assembly is subjected to pressure without the application of heat. (ASTM d 907-06)
cold-setting adhesive, N
an adhesive that sets without the application of heat. (ASTM d 907-06)
colophony, N
see rosin.
Related words  rosin, N 
color stability, N
the ability of a tape to retain its original color, particularly when exposed to light.
Color, N
the particular color of a tape, when looking at the backing, regardless of the color of the adhesive.
Compatibility, N

in building construction, the capability of two or more materials to be placed in contact or close proximity with no detrimental interaction. Discussion—compatibility for a sealant is characterized by, among others, no significant change in adhesive and cohesive properties or aesthetic appearance for its service life. (ASTM c717-07A)

compatible materials, N
In building construction, compounds or substances that can exist in close proximity to one another without detrimental effects on either. (ASTM c717-07A)

compression seal,N
a seal which is attained by a compressive force on the sealing material. (ASTM c717-07A)
condensation, N
a chemical reaction in which two or more molecules combine with the separation of water or some other simple substance. (see also polymerization.) Discussion—the process is called polycondensation if a polymer is formed. (ASTM d 907-06)
conditioning time, N

see joint conditioning time. (see also curing time and setting time.)

Related words  cure, curing time, n; joint conditioning time; setting time, n

 cone penetrometer, N

an instrument for measuring the relative hardness of soft deformable materials.

 Conformability,N

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

Consistency, N

that property of a liquid adhesive by virtue of which it tends to resist deformation. (see also viscosity and viscosity coefficient.) Discussion—consistency is not a fundamental property but is comprised of viscosity, plasticity, and other phenomena. (ASTM d 907-06)related words  viscosity coefficient, n; viscosity, N
contact adhesive, N

adhesive that is applied to both adherends and after a specified open assembly time will instantly develop a bond when a firm but not sustained pressure is applied. (ASTM d 907-06)

 contact bond adhesive, N

synonym for contact adhesive.

Related words  contact adhesive, N

 copolymer, N

see polymer.

Related words  polymer, N

 copolymerization, N

see polymerization.

Related words  polymerization, N

 corrosion, N

the chemical reaction between the adhesive or contamination and the adherend surfaces, due to reactive compounds in the adhesive film, leading to deterioration of the bond strength.

Coupling agent, N

a substance having functional groups that are capable of reacting with the surfaces of two different substances, thereby chemically bridging them. (ASTM d 907-06)

 coverage, N

the spreading power of an adhesive over the surface area of the adherend.
Crazing, N

a fracture at or under the surface. (ASTM d 907-06)
creep strain, N
the total strain, at any given time, produced by the applied stress during a creep test. (ASTM d 907-06)

 creep, N

in an adhesive, the time-dependent deformation usually resulting from sustained stress (sometimes called cold flow). (ASTM d 907-06); discussion—phenomena as oozing and increases in adhesion often result from this characteristic.

Creped, adj

in pressure-sensitive tapes, paper or some other material which has small "folds" in it, giving it high stretch.

 Cross laminate, N

see cross laminate under laminate , N.

Related words  laminate, N

 crosslink, v

to form chemical bonds between molecules to produce a three-dimensional network. (ASTM d 907-06) discussion---an improvement in shear resistance, high temperature resistance, and oil or solvent resis¬tance will normally result.

 C-stage, N

the final stage in the reaction of thermosetting resins, in which the material is practically insoluble and infusible. (ASTM d 907-06)

 cupping, N

in pressure sensitive tapes, a slightly u-shaped deformation of the tape (at right angles to the length) which usually appears after unwind tension is relaxed.

 Cure, curing time, n

the period of time during which an assembly is subjected to heat or pressure, or both, to cure the adhesive. (see also joint-conditioning time, setting time.) Discussion – further cure may take place after removal of the assembly from the conditions of heat or pressure, or both. (ASTM d 907-06)

 cure,N

the process by which a compound attains its intended performance properties by means of evaporation, chemical reaction, heat, radiation, or combinations thereof. (ASTM c717-07A)

 cure, v

to develop the strength properties of an adhesive (or sealant) by chemical reaction. (ASTM d 907-06)

 curing agent, N

a substance or mixture of substances that controls a curing reaction. (ASTM d 907-06)

 

curing temperature, N

the temperature to which an adhesive or an assembly is subjected to cure the adhesive. (ASTM d 907-06)

 curling, N

in pressure sensitive tapes, the tendency of a tape to curl back on itself when unwound from the rod and allowed to hang from the roll. 

D
Dead stretch, N
In pressure sensitive tapes, the net increase in length after tape has been elongated without breaking and allowed to recover.

 Delamination, n

the separation of layers in a laminate because of failure of the adhesive, either in the adhesive itself or at the interface between the adhesive and the adherend. (ASTM d 907-06); in pressure sensitive tapes, a separation or splitting of the tape such as separation of the backing into two distinct layers, separation between laminations of a tape con¬sisting of more than one backing, or the separation between filaments and backing of a filament reinforced tape.

 Delayed strain, N

see latent strain.
Related words  latent strain, N
 Depolymerization, N
separation of a complex molecule into simple molecules; also softening of a sealant by the same action.

Destructive test
see test, destructive.
Related words  test, destructive, N
 Dextrin, N
A water based product derived from the acidification and/or roasting of starch.

 Dielectric curing, N

the use of a high frequency electric field through a joint to cure a synthetic thermosetting adhesive; a curing process for wood and other nonconductive joint materials.

Dielectric strength, N
In pressure sensitive tapes, the voltage which a tape will withstand without allowing passage of the current through it.

 Diluent, N

a liquid additive, whose function is to reduce the concentration of solids or viscosity, or both, of an adhesive. (ASTM d 907-06)

 Discoloration, N

see stain.

Related words  stain, N

 Dishing, N

see telescoping.

Related words  telescoping, N

 Dispersion, N

a two-phase system in which one phase is suspended in a liquid. (ASTM d 907-06)

 Doctor blade, N

a scraper mechanism that regulates the dimensional thickness of adhesive on the spreader rolls or on the surface being coated. (synonyms: doctor knife; doctor bar.) (ASTM d 907-06)

 Doctor roll, n

 a revolving roller mechanism resulting in a wiping action for regulating the adhesive supplied to the spreader roll. (ASTM d 907-06)

 Double spread adhesive,N

an application of adhesive to both adherends or as two layers on one adherend. (ASTM d 907-06)

 Double spread, N

see double spread under spread.

Related words  spread, N

 Double-coated, adj

in pressure sensitive tapes, the adhesive is applied on both sides of the backing, which serves principally as a car-rier for the adhesive.

 Dry bond adhesive, N

synonym for contact adhesive.

Related words  contact adhesive, N

 Dry strength, N

see bond strength.

Related words  bond strength, N

 Dry tack, N

see dry tack under tack.

Related words  tack, N

Dry, v
To change the physical state of an adhesive on an adherend or between adherends by the loss of solvent constituents by evaporation or absorption, or both. (ASTM d 907-06)
 Drying agent, N
A component of a sealant that accelerates the oxidation of oils or unsaturated polymers.

Drying temperature, N
The temperature to which an adhesive or an assembly is subjected to dry the adhesive. (ASTM d 907-06)
Drying time,N

The period of time during which an adhesive or an assembly is allowed to dry, with or without the application of heat or pressure, or both. (ASTM d 907-06)
Durability, N

As related to adhesive joints, the endurance of joint strength relative to the required service conditions. Discussion—service conditions may include water and other chemicals, temperature, stress, radiation, microorganisms, and other environmental factors. (ASTM d 907-06); in building construction, a general term for resistance to deleterious change of an installed sealant. Discussion-- durability describes the ability of a sealant to maintain the required properties for its intended service. Durability is based on the length of time that a sealant can maintain its innate characteristics in use. This time will vary depending on the environment and use of the sealant (e.g. Outdoor vs. Indoor use). (ASTM c717-07A)

Durometer, n
An instrument used to measure hardness or shore a hardness; may also refer to the hardness rather than the instrument.

 E

Edge curl, N

The peeling back or lifting of the outer edge of a tape after application. (see cupping)
Related words cupping, N
Edge joint
See joint.
Related words joint, N 
Elastic memory, N
A tendency of some tape backings to attempt to return to their original length after being elongated. 

Elasticity, N

The ability of a material to return to its original shape after removal of a load.


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