The invention relates to multilayer product. The multilayer product includes at least two layers. At least one layer or two layers consist(s) of End of Life waste of fibre re-inforced thermosetting plastic or discarded production waste of fibre reinforced thermosetting plastic combined in-to a thermoplastic matrix. The thermoplastic matrix and thermosetting plastic are chemically connected to each other by one or more binders or coupling agents.
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
A method for manufacturing a plastic composition, comprising: mixing thermoplastic polymer material particles and thermoset composition particles comprising cured thermoset polymer, the mixing comprising rising the temperature of the composition and at least partly melting the surface of thermoplastic polymer material particles, and simultaneously mixing the particles allowing thermoset composition particles adhere to the thermoplastic polymer material particles, and cooling the composition.
C08L 63/00 - Compositions of epoxy resins; Compositions of derivatives of epoxy resins
C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
B29B 7/10 - Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
B29B 9/08 - Making granules by agglomerating smaller particles
B29B 13/02 - Conditioning or physical treatment of the material to be shaped by heating
B29B 13/04 - Conditioning or physical treatment of the material to be shaped by cooling
B29K 105/10 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns oriented
A method for manufacturing a plastic composition, comprising: mixing thermoplastic polymer material particles and thermoset composition particles comprising cured thermoset polymer, the mixing comprising rising the temperature of the composition and at least partly melting the surface of thermoplastic polymer material particles, and simultaneously mixing the particles allowing thermoset composition particles adhere to the thermoplastic polymer material particles, and cooling the composition.
Making a composite product such that first, a fibre material and a plastic material are ground to a smaller piece size and/or to a fibre-like form. The ground materials are melt processed into a composite product containing both the fibre material and the plastic material. At least one of the materials of the composite product is precompacted to a higher specific weight prior to being fed to melt processing. While compacting the material, a substance improving its dimensional stability may be added thereto, if desired. Preferably, the composite product contains aluminium particles.
A transverse stretching device comprises two stretching wheels (4) and endless bands (5) arranged against them and revolving around band guide rolls (6) so that a plastic film (2) to be stretched is arranged at its both edges between a stretching wheel (4) and a band (5). The stretching wheels (4) and the bands (5) are arranged in such a way that in the direction of travel of the plastic film (2) they are further apart from each other at the end than in the beginning, whereby the transverse stretching device (1) stretches the plastic film in the transverse direction. The stretching wheels (4) are rims open in the centre and the device includes heating means (9) arranged through the rims at least at some angle between the stretching wheels (4).
B29C 55/08 - Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
B29C 47/88 - Heating or cooling the stream of extruded material
Plastic material and nucleating agent are fed into an extruder (1), and the plastic material is subjected to cell forming. The substances in question are extruded into a plastic film preform (5b), simultaneously cooling the material to prevent foaming. The film preform (5b) is stretched in such a way that cavitation bubbles are generated in the film. The cell forming takes place in connection with stretching and relaxation. In other words, in the solution the cell forming is caused to take place when the plastic is not in a molten state.
Fibre material and at least one plastic material is extruded in such a way that a composite product (11) is produced. To increase the strength of the product (11) and to improve its heat resistance, the at least one plastic material of the product (11) is cross-linked in such a way that at least a surface of the wall of the product (11) is provided with a cross-linking degree higher than the cross- linking degree of an inner part of the wall of the product (11 ).
A film (5) is extruded from plastic material by means of an extruder. Material is mixed into the plastic (5a) of the plastic film (5) before the extrusion so that cavitation bubbles are formed in the material particles mixed into the plastic (5a) when the plastic film is stretched. The film (5) is orientated by stretching. After the extrusion the plastic film (5) is cooled slowly below the crystallization point of the plastic material before the orientation.
patents
