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acrylic adhesive
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A type of structural adhesive made from acrylic, a manufactured polymer. Acrylic adhesives set rapidly and are very strong due to heavy cross-linking.
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adhesive
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A substance used to join two or more materials. The pros and cons of adhesives relate specifically to how adhesives differ from the materials used for welding and mechanical fastening.
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adhesive bonding
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The process of binding materials together using any number of adhesive substances. Paste, glue, and tape are examples of common adhesives.
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adhesive failure
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The inability of an adhesive to stick to a surface. During adhesive failure, the adhesive cannot bind two surfaces together and separates from the substrate.
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anaerobic adhesive
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A type of structural adhesive that can cure and harden only in an environment absent of oxygen.
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blueprint
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A document that contains the instructions necessary to manufacture and/or assemble a part.
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butt joint
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A joint formed by two surfaces that meet without overlap or complex intersection. Butt joints are often combined with other joint designs.
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carbon dioxide
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A heavy, colorless, odorless gas. Carbon dioxide can be used to extinguish fires fueled by adhesives or curing agents.
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carrier
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The backing material to which pressure-sensitive adhesives stick. The carrier acts as a mode of transport for the adhesive.
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cleavage strength
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A material's ability to resist forces that attempt to pull an adhesive apart by separating rigid surfaces.
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cleavage stress
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A force that pulls an adhesive apart by separating two rigid surfaces.
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cohesive failure
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The inability of an adhesive to resist internal separation. During cohesive failure, the adhesive sticks to both surfaces, but cannot hold them together.
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cyanoacrylate
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A type of synthetic adhesive made from acrylic, a manufactured polymer. Cyanoacrylates bond with surfaces very quickly.
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damping
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The ability to resist stresses and deformation caused by vibration. Adhesives have stronger damping capability than mechanical fasteners.
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dispenser
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In adhesive bonding, a device that holds an adhesive and ejects the adhesive onto a surface. Dispensers can be handheld or attached to a robot.
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dry powder
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A solid consisting of very small particles in large numbers. Dry powder can be used to extinguish fires fueled by adhesives or curing agents.
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epoxy adhesive
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A type of structural adhesive made from epoxy, a manufactured polymer. Epoxy adhesives can bond with a variety of surfaces and are strong and resilient.
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foam
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A material consisting of a mass of small bubbles formed together into a type of semi-liquid. Foam can be used to extinguish fires caused by adhesives or curing agents.
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hot melt
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A type of adhesive that requires heat for application and strengthens as it solidifies.
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joggle lap joint
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A variation of the lap joint design in which one surface area is straight, while the second forms an "S" shape.
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joining
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The process of bringing and holding materials together by fastening, adhesive bonding, welding, or other similar processes.
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joint
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The location at which an adhesive layer holds two surfaces together.
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lap joint
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A joint formed when two surfaces overlap one another. Lap joints provide more stress resistance than butt joints.
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machine vision
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A system of cameras and computers that can be programmed to complete tasks. Machine vision can be used to help assemblers locate defective products.
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mechanical fastening
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The process of joining two materials through the physical interaction of a common device, or fastener. Common mechanical fastening processes include bolting and nailing.
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natural adhesive
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An adhesive made from naturally occurring living sources, such as plants and animals. Natural adhesives are also called organic adhesives.
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nonstructural adhesive
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A synthetic adhesive used for applications that do not require strong load-bearing capabilities. Nonstructural adhesives can be easily unbonded from surfaces.
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organic adhesive
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An adhesive made from naturally occurring living sources, such as plants and animals. Organic adhesives are also called natural adhesives.
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peel strength
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A material's ability to resist forces that attempt to pull an adhesive apart by separating flexible surfaces.
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peel stress
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A force that pulls an adhesive apart by separating one flexible surface and one rigid surface.
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pressure-sensitive adhesive
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PSA. An adhesive that needs only minimal pressure to stick to a surface.
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shear strength
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A material's ability to resist forces that attempt to cause the internal structure of the material to slide against itself.
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shear stress
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A force that attempts to cause the internal structure of a material to slide against itself.
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silicone adhesive
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A type of structural adhesive made from silicone. Silicone adhesives set as soon as they contact air.
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solvent
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A chemical material that attempts to dissolve another material. Solvents can be used to remove adhesives from a surface.
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strap joint
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A joint design that combines the butt joint and lap joint. A butt joint is formed, and a third plank of material is then adhered to the area above the butt joint.
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stress
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Any force that attempts to physically deform an object.
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structural adhesive
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A synthetic adhesive with strong load-bearing capabilities. Structural adhesives are not easily unbonded from surfaces.
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substrate
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The surface material upon which an adhesive is applied to form a bond or joint.
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synthetic adhesive
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A chemically manufactured adhesive derived from either thermoplastics or thermosets. Synthetic adhesives are commonly used in industrial settings.
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tensile strength
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A material's ability to resist forces that attempt to pull apart or stretch it.
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tensile stress
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A force that attempts to pull apart or stretch a material.
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tongue and groove joint
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A joint formed by inserting part of one surface material into a recessed area of a second surface. This joint design offers excellent stress resistance.
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urethane adhesive
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A type of structural adhesive made from urethane, a manufactured polymer. Urethane adhesives form flexible joints.
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viscosity
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A fluid's resistance to flow. An adhesive must have low viscosity in order to fill the crevices of a surface. However, if the viscosity is too low, the adhesive will run off the surface and form no bond at all.
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welding
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A joining process that uses heat, pressure, and/or chemicals to fuse two materials together permanently.
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wetting
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The process of spreading an adhesive over a surface. Proper wetting occurs when the adhesive fills all crevices of the surface.
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