A hand-held lift loop assembly tester apparatus and method tests peel strength of a heat seal connection between a lift loop patch and a bulk bag body as an indicator of shear strength of the connection and whether the bag will pass industry safety lifting requirements. A lifting platform of the hand loop tester is inserted between the patch and the bag body in an unsealed area and measures the amount of peel and thus the peel strength of the heat seal bond or connection at the edges or sides of the unsealed area. If the peel strength is adequate, this is a reliable indicator that the shear strength of the bond or connection is also adequate and that the bag will meet the current industry required 5 to 1 safety lifting requirements.

A device and a method for peeling tests, in order to test the peeling resistance of coupons each formed of a support and an adhesive. The device comprises: (i) a frame comprising rollers with parallel axes designed to maintain the coupon supported while guiding movement of the latter, (ii) a traction device comprising a vertical jack linked to an attachment element comprising a loop configured in order to cause detachment of the adhesive from the surface of the support, (iii) a device for measuring the force exerted by the jack in order to pull the loop during peeling, and (iv) a coupon, complex in shape, such as one derived from a reinforced vane. At least one roller is translationally adjustable in relation to other rollers and the coupon is specially prepared in order to facilitate carrying out the tests.

A device and method for testing fracture toughness of a solid-ice interface on a surface of coating material in a large-scale freezing status are provided. The method uses the principle of single-cantilever beam loading, and utilizes the bending stress of a metal substrate to induce the generation and extension of micro-cracks at the solid-ice interface, which are intended to observe the fracture behavior at the interface between the surface of a coating material with metal as a substrate and the ice layer, so as to obtain the fracture toughness at the interface between the ice layer and the surface of the substrate.

A method of performing an automated non-destructive examination of a composite structure includes identifying surface damage on the composite structure, coupling an automated tap tester device to a surface of the composite structure at a location of the surface damage, and performing, with the automated tap tester device, a plurality of tapping impacts on the surface within a testing area that encapsulates the surface damage. The method also includes receiving a plurality of acoustic signals associated with the plurality of tapping impacts, modeling sub-surface damage associated with the surface damage based on an analysis of the plurality of acoustic signals.

A method of evaluating a laminate formed of two or more layers bonded to each other includes an image obtaining step of obtaining a two-dimensional image of the laminate; a detecting step of detecting air-pocket corresponding regions from a two-dimensional image; a characteristic value obtaining step of determining a characteristic value related to areas of the air-pocket corresponding regions; and an evaluation step of evaluating the laminate based on the characteristic value. is a method of evaluating a laminate.

A measuring apparatus to measure adhesive performance of a Pressure Sensitive tape or label, which includes an electric or pneumatic actuator that can be triggered manually or remotely to perform a rolling ball tack evaluation at different or extreme conditions to those standardized in an adhesives laboratory, by using a small laboratory oven or small weathering chamber to simulate those extreme conditions. Also, installing this apparatus inside of those chambers and triggering it remotely through the mentioned actuator installed in the apparatus. The triggering systems includes; a power source to convert the standard laboratory high voltage source to low DC voltage to avoid the risk of an electric shock during the apparatus operation, a couple of metallic isolated cables for electric conduction of voltage to the actuator electric coil, an electric control box containing a momentary push button switch, the actuator containing an electric coil, a spring and a metallic mobile piston, and a mechanical fastening system to attach the actuator to the apparatus and the piston to the mechanical ball release system.

An interfacial adhesion strength measuring apparatus of a gas diffusion layer for a fuel cell is provided. The apparatus includes a pair of load applying parts that are each adhered to outer surfaces of a substrate configuring the gas diffusion layer of the fuel cell and a micro porous layer coated on the substrate and is configured to apply a tension force in a direction in which the substrate and the micro porous layer are separated from each other. A first adhering part is applied to one of the load applying parts and is adhered to the substrate and a second adhering part is applied to the other of the load applying parts and is adhered to the micro porous layer. In addition, the first and second adhering parts contain materials of which contact angles with the substrate or the micro porous layer are different from each other, respectively.

Provided is a method for measuring the peeling stability of a release film and a release film laminate by measuring a high-speed release strength balance and a low-speed strength balance on the basis of General Formulas 1 and 2.

A coupon suitable for peeling tests, derived from a vane and comprising: (i) a portion of blade that comprises a frontside surface, a backside surface and a leading edge and/or trailing edge and (ii) a vane reinforcement that covers and is glued to at least a part of the frontside surface, a part of the backside surface and which extends beyond the leading and/or trailing edge. The reinforcement is split over the entire length of the leading edge and/or trailing edge such that the reinforcement is separated into two plates separate from one another and facing each other on either side of the slit beyond the leading and/or trailing edge. Furthermore, at least one of the plates furthermore comprises, beyond the leading and/or trailing edge, fastening means providing a hold to this same plate.

A method of measuring adhesive strength includes setting an evaluation time (t.sub.e), fixing a substrate and an adhesive member to a measurement device, pulling the adhesive member fixed to the measurement device with a first measurement force (F.sub.e1) for the evaluation time (t.sub.e), pulling the adhesive member fixed to the measurement device is pulled with a second measurement force (F.sub.e2), which is obtained by increasing the first measurement force (F.sub.e1) by a preset amount, for the evaluation time (t.sub.e), and determining a reference measurement force (F.sub.es) which is a static force applied to the adhesive member when a distance by which a first portion of the adhesive member is detached from the substrate is equal to a preset distance (d.sub.t) is determined.