Adhering systems for magnetizable laminates to assist preventing delamination of magnetizable laminates exposed to direct sunlight; and, relating to preventing fouling of cutting blades during cutting of magnetizable laminates.

The present invention relates to a halogen-free epoxy resin composition, a prepreg, a laminate and a printed circuit board containing the same. The halogen-free epoxy resin composition comprises an epoxy resin and a curing agent. Taking the total equivalent amount of the epoxy groups in the epoxy resin as 1, the active groups in the curing agent which react with the epoxy groups have an equivalent amount of 0.5-0.95. By controlling the equivalent ratio of the epoxy groups in the epoxy resin to the active groups in the curing agent to be 0.5-0.95, the present invention ensures the Df value stability of prepregs under different curing temperature conditions while maintaining a low dielectric constant and a low dielectric loss. The prepregs and laminates prepared from the resin composition have comprehensive performances, such as low dielectric constant, low dielectric loss, excellent flame retardancy, heat resistance, cohesiveness, low water absorption and moisture resistance, and are suitable for use in halogen-free multilayer circuit boards.

A three dimensional retroreflective article having an outer surface with a reflectivity of at least about 200 lux, and method for making such an article from a thermoformable laminate is provided. The laminate includes a base layer of thermoformable plastic sheet material; and a layer of microbeads configured in a high-density arrangement and silvered on their bottom sides to enhance retroreflectivity. The microbeads are adhered to an outer surface of the base layer by a thermoformable cushion coat which may include a phosphorescent pigment to further enhance reflectivity. A protective sheet of transparent thermoformable sheet material overlies and may be in contact with the layer of microbeads. The laminate is heated and thermoformed into a self supporting three dimensional article having a pre-selected shape and an encapsulated bead retroreflective surface having a reflectivity of at least about 200 lux. The thermoforming step imparts sufficient non-planarity in the resulting retroreflective surface so that retroreflective dead spots created by contact between the microbeads and the protective sheet of transparent sheet material are effectively optically cancelled by overlapping zones of retroreflectivity generated by the microbeads.

A floor panel with a substrate and a decoration provided thereon. The substrate includes at least a foamed layer of thermoplastic material and at least a reinforcement layer. Additionally, a method for manufacturing such floor panels with a substrate and a decoration, where the substrate includes at least a foamed layer of thermoplastic material and at least a reinforcement layer.

A thermal conducting sheet having a high adhesion between layers even if the thermal conducting sheet has a multilayer structure is provided. The thermal conducting sheet including a low-hardness layer and a reinforcing layer laminated on one side or both sides of the low-hardness layer. The reinforcing layer having a hardness greater than a hardness of the low-hardness layer. The low-hardness layer comprises: acrylic polymer, silicon carbide, aluminum hydroxide, magnesium hydroxide, and plasticizer.

A resin composition is provided. The resin composition comprises: (A) a compound having a structure of formula (I), ##STR00001## wherein R.sub.1 is an organic group; and (B) a vinyl-containing elastomer, wherein the weight ratio of the compound having the structure of formula (I) to the vinyl-containing elastomer is 20:1 to 1:1.

The present invention relates to a halogen-free epoxy resin composition, a prepreg and a laminate containing the same. The halogen-free epoxy resin composition comprises 60 parts by weight of epoxy resin, from 15 to 28 parts by weight of benzoxazine resin, and from 10 to 20 parts by weight of styrene-maleic anhydride. The present invention discloses using from 15 to 28 parts by weight of benzoxazine resin and from 10 to 20 parts by weight of styrene-maleic anhydride to cure 60 parts by weight of epoxy resin, to ensure the Df stability of prepregs at different curing temperature conditions while maintaining low dielectric constant and low dielectric loss. The prepregs and laminates prepared from the resin composition have comprehensive performances, such as low dielectric constant, low dielectric loss, excellent flame retardancy, heat resistance, cohesiveness, low water absorption and moisture resistance, and are suitable for use in halogen-free multilayer circuit boards.

The present disclosure discloses a multilayer film comprising: (a) at least one print layer (102); (b) at least one tie layer (104); (c) at least one second tie layer (108); and (d) at least one sealant layer (110), wherein the multilayer film comprises at least one polyethylene having a weight percentage in the range of 80-95% with respect to the multilayer film, and a density in the range of 0.941-0.99 gm/cm.sup.3. Also disclosed herein is a process of manufacturing a multilayer film.

A three-dimensional lattice architecture with a thickness hierarchy includes a first surface and a second surface separated from each other with a distance therebetween defining a thickness of the three-dimensional lattice architecture; a plurality of angled struts extending along a plurality of directions between the first surface and the second surface; a plurality of nodes connecting the plurality of angled struts with one another forming a plurality of unit cells. At least a portion of the plurality of angled struts are internally terminated along the thickness direction of the lattice structure and providing a plurality of internal degrees of freedom towards the first or second surface of the lattice architecture.

A crane mat having first and second side beams or boards; a core structure made of pine or other softwoods, eucalyptus, solid plastic or elastomeric members, or hollow thermoplastic, thermosetting plastic or elastomeric members that optionally include a filler or internal reinforcing structure; external components including an upper and/or lower layers of one or more elongated members to protect the core structure, and a plurality of joining members that attach the outer side members to the core structure. Another crane mat can be made of just the solid plastic or elastomeric members, or hollow thermoplastic, thermosetting plastic or elastomeric members that each include a plurality of spaced lateral apertures passing therethrough; and joining members that include a rod that passes through the aligned lateral apertures to hold the members together in the mat. These crane mats may also include lifting elements of the types described herein.