Abstract:
There is provided a random mat for obtaining a fiber-reinforced composite material excellent in tensile strength. A random mat including carbon fibers and a matrix resin, wherein the carbon fibers in the random mat have an average fiber length in a range of 3 mm to 100 mm, a fiber areal weight of the carbon fibers is 25 to 10,000 g/m 2 , at least one of fiber bundles including the carbon fibers less than a critical number of single fiber being defined by the following formula (1) and a single fiber, and carbon fiber bundles (A) constituted by the carbon fibers of the critical number of single fiber or more are present in the random mat, a ratio of the carbon fiber bundles (A) to a total amount of the carbon fibers in the random mat is a range of 20 Vol% to 99 Vol%, an average number (N) of fibers in the carbon fiber bundles (A) satisfies the following formula (2), and a ratio of carbon fiber bundles having a thickness of 100 µm or more of the carbon fiber bundles (A) is less than 3% of the number of whole carbon fiber bundles (A): Critical number of single fiber = 600 / D 0.6 × 10 4 / D 2
Abstract:
A joint structure of a composite bicycle frame, comprising: a base layer (110a, 210a, 310a) made of a first polymeric matrix material doped with a plurality of first fibers (112), wherein the first fibers (112) have random fiber orientation, and the base layer (110a, 210a, 310a) has a first thickness (T1); and at least one reinforcing layer (120a, 220a, 320a) adhesively connected to the base layer (110a, 210a, 310a), wherein the reinforcing layer (120a, 220a, 320a) is made of a second polymeric matrix material doped with a plurality of second fibers (122), the second fibers (122) have a single fiber orientation, and the reinforcing layer (120a, 220a, 320a) has a second thickness (T2) which is smaller than the first thickness (T1) of the base layer (110a, 210a, 310a).
Abstract:
A molded object includes: a first layer (10) formed using a fiber-reinforced resin material including thermoplastic resin and strip-shaped reinforcement fiber bundles each composed of a plurality of reinforcement fibers aligned unidirectionally, the strip-shaped reinforcement fiber bundles being three-dimensionally and randomly stacked; and a second layer (20) made of a fiber-reinforced resin material including thermoplastic resin and reinforcement fibers of filaments, and formed on at least one surface of the first layer (10).
Abstract:
The apparatus (1) for making a fibrous-containing and/or particle-containing nonwoven (NW) comprises a spinning unit (10) with a spinning head (104), a forming surface (11a) that is movable in a conveying direction (MD), and a channel (13) positioned between the spinning head (104) and the movable forming surface (11a), and formed between at least two transverse walls (14a; 14b), that extend transverse to the conveying direction (MD) and that are in the vicinity of the movable forming surface (11a), or that are in frictional contact with the movable forming surface (11a). The spinning unit (10) is adapted for spinning a stream of polymeric filaments or fibres (F) passing through said channel (13) and deposited onto said forming surface (11a). The apparatus further comprises supplying means (15) adapted for blowing at least one stream of cooling gas (C) and fibrous material and/or particles inside said channel (13) in the vicinity of the spinning head (104) and towards the stream of hot polymeric filaments or fibres (F) inside said channel (13), said at least one stream of cooling gas (C) enabling simultaneously to cool the stream of hot fibres or filaments (F) produced by the spinning unit (10) and to transport and blow the fibrous material (M) and/or particles inside said channel (13) and into said stream of hot polymeric filaments or fibres (F).
Abstract:
The invention relates to a method of making fibrous material, the method comprising: shearing a fiber source to provide a first fibrous material; and passing the first fibrous material through a first screen having an average opening size of 1.59 mm or less to provide a second fibrous material, wherein the method further comprises shearing the second fibrous material.
Abstract:
The invention relates to a 3-dimensional high-strength fiber composite component having isotropic fiber distribution, comprising 25 to 70 wt% of high-strength, high-modulus fibers, up to 5 wt% of binding fibers, and 25 to 70 wt% of thermosetting or thermoplastic matrix. The invention further relates to a method for producing same, comprising the following steps: preparing (1, 2, 3) the fibers by opening the fibers by releasing the fibers from fiber bundles, bales, or textile structures; sucking and/or blowing (6) the opened fibers onto a three-dimensional, air-permeable tool half (5) having the contour of this side of the component in an interactively controlled manner; pre-solidifying the obtained fiber molding in the flock box (4); transferring the fiber molding (7) onto a pressing tool (11) in the form of the contour of the air-permeable tool half (5) of the component; bringing (10) into contact with at least one liquid plastic; and solidifying the fiber molding by pressing (11) in order to form a component.
Abstract:
A hybrid reinforcement material (18) is disclosed that includes a plurality of reinforcement fibers (12) and a plurality of carbon fibers (14) comingled with the reinforcement fibers (12). The reinforcement fibers (12) are selected from natural fibers, organic fibers, and inorganic fibers and form a single hybrid assembled roving with the carbon fibers (14). The carbon fibers (14) are post-coated with a compatibilizer. The hybrid assembled roving (18) may be formed using a hybrid of glass and carbon fibers.