Nova Patents
MX349378B

Method for forming reinforced pultruded profiles.

Abstract

A method and apparatus for forming a profile containing at least one layer of continuous fibers and at least one layer of discontinuous fibers. Such a method allows selective control of characteristics to achieve that a profile has an increased transverse strength and bending coefficient. The continuous fiber layer can be formed from one or more continuous fiber reinforced tapes ("CFRT") (12) containing fibers embedded within a thermoplastic polymer matrix, whereby a void fraction is minimized in turn and the bending coefficient are optimized. Furthermore, the tape (s) are consolidated so that the continuous fibers remain fixed in alignment with a substantially longitudinal direction (eg, the stretch extrusion direction). In addition to improving the tensile properties of the profile, the use of such tapes also allows for improved capacity when placed in the desired position within the stretch extrusion die. The discontinuous fibers are also integrated into a thermoplastic matrix, in such a way that they help in the union of the layers to achieve the desired resistance. At least a portion of the fibers are oriented in the transverse direction to provide increased transverse strength.

MX349378B, drawing sheet 1
Sheet 1 of 55

Term

4.7 yearsleft in the term

Expires 22 June 2031.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

30 claims: 5 independent, 25 dependent

  1. 1
    NOVEDAD DE LA INVENCION NOVELTY OF THE INVENTION Habiendo descrito la presente invención como antecede, se considera, como novedad y por lo tanto se reclama como propiedad lo descrito en las siguientes:Having described the present invention as above, it is considered as a novelty and therefore what is described in the following is claimed as property: CLAIMS Z 1. A method of forming a draw profile having a cross-sectional shape, the method characterized by comprising: REIVINDICACIONES Z 1. Un método para formar un perfil de extraído por estirado que tiene una forma en corte transversal, el método caracterizado porque comprende: z jalar una cinta de fibra continua a través de una matriz de extrusión por estirado en una dirección longitudinal, en ✓ z pulling a continuous fiber tape through a stretch extrusion die in a longitudinal direction, in ✓ donde la cinta de fibra discontinua contiene fibras continuas que se orientan sustancialmente en la dirección longitudinal e integran dentro de una primera matriz polimérica termoplástica;wherein the discontinuous fiber tape contains continuous fibers that are oriented substantially in the longitudinal direction and integrated within a first thermoplastic polymeric matrix;z introducing a discontinuous fiber material into the stretch extrusion die, wherein the discontinuous fiber material contains integrated discontinuous fibers within a second thermoplastic matrix;and wherein the discontinuous fiber material is introduced into the draw extrusion die by supplying the discontinuous fiber material at an entry angle relative to the longitudinal direction, wherein the entry angle is approximately 45 ° or more. , and flowing fiber material 58 IMPIS ^ ζ IFUTTTUTO MEXICANO <· Jk z introducir un material de fibra discontinua en la matriz de extrusión por estirado, en donde el material de fibra discontinua contiene fibras discontinuas integradas dentro de una segunda matriz termoplástica;y en donde el material de fibra discontinua se introduce dentro de la matriz de extrusión por estirado mediante el suministro del material de fibra discontinua a un ángulo de entrada relativo a la dirección longitudinal, en donde el ángulo de entrada es de aproximadamente 45° o más, y fluyendo el material de fibra 58 IMPIS^ ζ IFUTTTUTO MEXICANO <· Jk M la non tbAb INDUSTRIAL discontinua a través de una entrada curveada desde el ángulo de entrada hacia la dirección longitudinal de forma tal que el material de fibra discontinua fluye en la dirección longitudinal antes de combinar el material de fibra 5 discontinua y la cinta fibra continua;y / dentro de la matriz de extrusión por estirado, combinar el material de fibra discontinua y la cinta de fibra continua para formar una primera y segunda capas del perfil, en donde la primera capa se coloca adyacente a la segunda capa e 10 incluye el material de fibra discontinua, y en donde la / segunda capa incluye la cinta de fibra continua. M la non tbAb INDUSTRIAL discontinuous through a curved inlet from the inlet angle towards the longitudinal direction such that the discontinuous fiber material flows in the longitudinal direction before combining the discontinuous fiber material and the continuous fiber tape;and / within the stretch extrusion die, combining the discontinuous fiber material and the continuous fiber tape to form a first and second layers of the profile, where the first layer is placed adjacent to the second layer and includes the material staple fiber, and wherein the / second layer includes the continuous fiber tape. Y y
  2. 4
    El método de conformidad con caracterizado porque la primera matriz la reivindicación 1, termoplástica incluye un primer polímero termoplástico y la segunda matriz termoplástica incluye un segundo polímero termoplástico, en donde el primer y segundo polímeros termoplásticos son los mismos. Four. The method according to characterized in that the first thermoplastic matrix in claim 1 includes a first thermoplastic polymer and the second thermoplastic matrix includes a second thermoplastic polymer, wherein the first and second thermoplastic polymers are the same. / /
  3. 8
    The method in accordance with the rei vi ndi c ^ c ^ op ^ 6,. ~ characterized in that the continuous fibers are under tension when impregnated with the thermoplastic matrix. 8. El método de conformidad con la reí vi ndi c^c^ óp^ 6, . ~ caracterizado porque las fibras continuas se encuentran bajo tensión cuando se impregnan con la matriz termoplástica.
  4. 10
    10% by weight to about 60% by weight of the tape and the continuous fibers make up from about 40% by weight to about 90% by weight of the tape. 10% en peso a aproximadamente 60% en peso de la cinta y las fibras continuas constituyen de aproximadamente 40% en peso a aproximadamente 90% en peso de la cinta. / 10. El método de conformidad con la reivindicación 1, caracterizado porque las fibras discontinuas incluyen fibras largas. / 10. The method according to claim 1, characterized in that the discontinuous fibers include long fibers. , ,
  5. 29
    The method in accordance with. claim 1, characterized in that the profile is solid. 29. El método de conformidad con . la reivindicación 1, caracterizado porque el perfil es sólido.
Independent claims5