A structure contains a first member formed from a thermoplastic resin composition A and a second member formed from a thermoplastic resin composition B, the first member and the second member being joined at least partially, wherein the thermoplastic resin composition A molded into a molding with a thickness of 2 mm has a transmittance of 70.0% or more at a frequency of 76.5 GHz; the thermoplastic resin composition B molded into a molding with a thickness of 2 mm has a transmittance of less than 50.0% at a frequency of 76.5 GHz; and the thermoplastic resin composition B molded into a molding with a thickness of 2 mm has an absorbance of 40.0% or more at a frequency of 76.5 GHz:

The present invention provides a methacrylic resin composition for non-contact hot plate welding comprising a methacrylic resin comprising 80 to 99.9% by mass of a methacrylic acid ester monomer unit and 0.1 to 20% by mass of a unit of at least one additional vinyl monomer copolymerizable with the methacrylic acid ester monomer, wherein the methacrylic resin composition has a melt flow rate (MFR) of 2.5 g/10 min or lower at 230 C. at a load of 3.8 kg.

An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.

The present disclosure is directed to processes for producing ultrasonic sealable film structures and flexible containers with ultrasonic seals. The film structure includes a first multilayer film and a second multilayer film. Each multilayer film includes a backing layer and a seal layer. Each seal layer includes an ultrasonic sealable olefin-based polymer (USOP) having the following properties: (a) a heat of melting, Hm, less than 130 J/g, (b) a peak melting temperature, Tm, less than 125 C., (c) a storage modulus in shear (G) from 50 MPa to 500 MPa, and (d) a loss modulus in shear (G) greater than 10 MPa.

The multilayer films are arranged such that the seal layer of the first multilayer film is in contact with the seal layer of the second multilayer film. The seal layers form an ultrasonic seal having a seal strength from 30 N/15 mm to 80 N/15 mm when ultrasonically sealed at 4 N/mm seal force.

A system for in-line controlling of the ultrasonic welding of plastic components of an electronic cigarette, in which plastic components are welded to one another at a welding zone to define a welded group; the plastic components are such that the welded group has an air passage duct having a first open end and a second open end. The system includes: a chamber for receiving the welded group; a closure for closing the first open end; air supply for supplying air into the chamber. The system further includes an air exit, connecting the welding zone with the outside of the chamber; a continuous pressure control and adjustment for continuously controlling and regulating the air pressure that enters the air passage duct to keep a fixed air pressure; an air passage nozzle having a predetermined cross section, position between the continuous pressure control and adjustment and the second open end; and a pressure sensor for detecting the air back pressure generated in the chamber after the introduction of air into the air passage duct.

A plastic bag comprising a welded segment at its closure which comprises sealing projections and interlocking projections to form a high integrity seal at the closure edges.

There is provided apparatus and a method for assessing the integrity of a bonded joint and a bonded joint assembly. The assembly has a bonded joint monitored for bond integrity and comprises first (1) and second (2) components each defining a bonding surface (3,4); the joint (5) is formed between the bonding surfaces (3,4) and the first component (1) defines a passage (15) therethrough from the bonding surface to an exterior of the component. The joint (5) includes an optical fiber (11) extending along the joint (5) between the bonding surfaces, through the passage (15) and emerging from the passage (15) to the exterior of the component. The method of constructing the assembly includes the steps of passing the optical fiber (11) through the passage (15) and adhering the optical fiber (11) to the bonding surface (3) of the first component (1), thus bringing the two bonding surfaces (3,4) together and forming the bond (5).

Process for forming a permanent join between two sections of fibrous material contained in a thermosetting resin matrix, said process comprising overlaying the two sections and subjecting the overlaid sections to ultrasonic welding to form a permanent join between the two sections, wherein there is no significant change in the sub-ambient Tg of the fibrous material contained in the thermosetting resin matrix in the region of the permanent join.

A composite laminate for connection to at least one attachment component in a load-introduction joint, said composite laminate comprising an opening that is adapted to receive a load-introduction component of said load-introduction joint, wherein a prefailure indication element is provided in the region of said opening, said prefailure indication element being modifiable by said load-introduction component in a prefailure mode of said load-introduction joint for indication of an impending function-affecting failure of said composite laminate. The invention is further related to a corresponding load-introduction component.

A method and system for the ultrasonic non-destructive testing of joints in plastic pipes using A-scans. A hand-held ultrasonic transducer is used to perform an A-scan and a comparison made on a response from the interface region of the joint used to determine a quality of the joint. Levels of result can provide a binary output to give an indication of whether or not a defect is present in the joint. Comparison techniques are described. Tests for coupling efficiency and performance are described making the system useable by an unskilled technician. The system finds application in fault detection on electro-fusion welds in plastic pipe joints.