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abhesive, n
A material which is adhesive resistant and applicable as a non-sticking surface coating; release agent.
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abrasion resistance, n
Ability of a tape to withstand rubbing and still function satisfactorily.
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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).
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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
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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
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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.
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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.
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activator, n
A material that speeds up normal curing mechanisms.
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adhere, v
To cause two surfaces to be held together by adhesion. (ASTM D 907-06)
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adherend, n
A body held to another body by an adhesive. adherend preparation, n—see surface preparation. (ASTM D 907-06)
Related Words
surface preparation, n
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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
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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.
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adhesion promoter, n
A substance 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
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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.
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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)
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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
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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.
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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
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adhesive joint, n
The location at which two adherends are held together with adhesive. (ASTM D 907-06)
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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.
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adhesive, thermoplastic, n
See thermoplastic adhesive under thermoplastic.
Related Words
thermoplastic, n, adj
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adhesive, thermosetting, n
See thermosetting adhesive under thermoset.
Related Words
thermoset, n, adj
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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)
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adsorption, n
The action of a body in condensing and holding gases and other materials at its surface.
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alligatoring, n
Cracking of a surface into segments so that it resembles the hide of an alligator.
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ambient temperature, n
Temperature of the air surrounding the object under construction or test.
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amylaceous, adj
Pertaining to, or of the nature of, starch; starchy. (ASTM D 907-06)
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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)
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apparent viscosity, n
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)
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asphalt, n
A naturally occurring mineral pitch or bitumen.
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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)
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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)
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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
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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)
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Courtesy ASTM International
Where noted, the definitions in this section are reprinted, with permission, from the ASTM standards noted, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete standard may be purchased from ASTM International, phone: 610-832-9585, fax: 610-832-9555.
To order online, click on the links below:
 ASTM Standard Terminology of Building Seals and Sealants C717-07A
ASTM Standard Terminology of Adhesives D907-06
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