Abstract:
The invention relates to composite structures having surface, which surface has at least a portion made of a composition comprising one or more polyamides having an excess of amine end groups such that the ratio of the amine end groups to the acid end groups is at least 1.5:1.0.
Abstract:
A fibre board comprises a mat 16 of fibrous material 17 coated with sugar-based bio-resin which is cured to form hard layers 18. The thickness of the resin and the fibre is adjusted and the whole is compressed by a controlled amount to give the board defined physical properties. The thickness of the layers and the compression may be adjusted to optimise sound absorbing, thermal insulation or stiffness. The thickness of the resin on one face of the fibre mat may be different to that on the other. The board may be used as the outer layer of a laminate comprising a central layer of heat or sound absorbing material such as cork, wood or paper honeycomb and the resin coating of the fibre mat may be cured at the final stage of assembly to make an adhesive bond between the core and the mats. The fibre mat may be made up of cross-lapped layers of aligned natural fibres which are consolidated by needle punching.
Abstract:
Disclosed is an eco-friendly incombustible biocomposite including: a) a polymer matrix comprising a natural fiber; and b) a ceramic sheet laminated integrally with the polymer matrix. The biocomposite is eco-friendly since the natural fiber is used as a reinforcement material and is incombustible since it is laminated integrally with the ceramic sheet. Further, it has superior storage modulus, dimensional stability and flexural properties and lightweightness, and is processable into various structures. Thus, it is very useful for automotive or building indoor/outdoor materials.
Abstract:
Sterilizable multilayer material (1), in particular for packaging at least one device for medical use, comprising a non-thermofusible sheet (2) sandwiched between two lower and upper thicknesses (3, 4) of thermofusible material of at least one thermofusible sheet (F), these thicknesses of thermofusible material being welded together across the non-thermofusible sheet.
Abstract:
Precursors and methods for manufacturing perforated composite parts are disclosed. An exemplary precursor (19) comprises structural fibres (24,28) embedded in a cured matrix material (24,26) and interposed between two removable plies (20). The precursor may also comprise a sacrificial fibre (28) extending through the removable plies (20), the matrix material (24,26) and between the structural fibres (24,28). An exemplary method comprises removing the removable plies (20) from the precursor (19) and removing the sacrificial fibre (28) from the precursor after removing the removable plies to form a through hole in the precursor (19) at a location of the sacrificial fibre (28).
Abstract:
Nonwoven materials having a first region and a plurality of discrete integral second regions that are in the form of three-dimensional deformations forming protrusions that extend outward from the first surface of the nonwoven material and wide base openings adjacent to the second surface of the nonwoven material are disclosed. The nonwoven materials include at least two layers that are each formed of a plurality of fibers. The first region has a first light transmission value and the second regions have a second light transmission value.
Abstract:
A method of forming deformations in a nonwoven web includes the steps of: a) providing a precursor nonwoven web; b) providing a pair of forming members which include: a first forming member having a surface comprising a plurality of discrete, spaced apart male forming elements; and a second forming member having a surface comprising a plurality of recesses in the second forming member, wherein the recesses are aligned and configured to receive the male forming elements therein, wherein the recesses have a plan view periphery that is larger than, and may completely surround, the plan view periphery of the male elements; and c) mechanically deforming the precursor nonwoven web with the forming members by placing the precursor nonwoven web between the forming members. At least one of the first forming member and the second forming member has a plurality of discrete surface texture elements thereon. The method forms a nonwoven web having a generally planar first region and a plurality of discrete deformations. The deformations form protrusions that extend outward from the first surface of the nonwoven web and a base opening adjacent to the second surface of the nonwoven web.