MULTILAYER BODY, METHOD FOR PRODUCING SAME AND PREPREG

• Main Authors: SAKATA, Hiroaki, SADO, Yuki
• Format: Patent
• Language: English; French; German
• Published: 04.10.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAUNDERING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

An object of the present invention is to provide a lightweight laminate capable of maintaining mechanical properties while exhibiting excellent flame retardancy, a method for producing the laminate, and a prepreg. The laminate of the present invention is a laminate including: fibers; a matrix resin; and a flame-retardant filler, in which in a cross section at 45° with respect to a fiber direction, when an area occupied by the flame-retardant filler in the entire cross section at 45° is 100%, an area occupied by the flame-retardant filler in a range of 400 um from one outermost surface of the laminate is 70% or more, and when a flame-retardant filler area in the range of 400 µm from the outermost surface in the cross section at 45° is A, and a matrix resin area is B, 0.01 < A/B < 0.15 holds, and the laminate can be suitably produced by stacking the following prepreg so that a side where the flame-retardant filler is unevenly distributed is an outermost layer. The prepreg of the present invention is a prepreg including: fibers; a matrix resin; and a flame-retardant filler, in which when an uneven distribution rate of the flame-retardant filler in the cross section at 45° with respect to the fiber direction is 660 or more, and when the flame-retardant filler area in the cross section is A and the matrix resin area is B, 0.01 < A/B < 0.15 holds.