阅读说明：本技术 编织预成型半径填料 (Braided preformed radius filler ) 是由 M·林德尔 J·洛 R·沃卡茨 于 2020-03-16 设计创作，主要内容包括：本发明涉及编织半径填料,其包含至少三个碳纱线,其中至少一个碳纱线是连续碳长丝纱线,且至少两个碳纱线互相编织在一起,其中所述至少一个连续碳长丝纱线含有相对于连续碳长丝纱线的纤维重量计1至10重量％的浓度的树脂组合物,且所述半径填料中的树脂总量为相对于半径填料的总纤维重量计小于10重量％,且所述编织半径填料根据公式编织。本发明的另一目的涉及生产所述半径填料的方法和包含所述半径填料的复合材料。(The present invention relates to a braided radius filler comprising at least three carbon yarns, wherein at least one carbon yarn is a continuous carbon filament yarn and at least two carbon yarns are braided with each other, wherein said at least one continuous carbon filament yarn contains a resin composition in a concentration of 1 to 10 wt% with respect to the weight of the fibers of the continuous carbon filament yarn, and the total amount of resin in the radius filler is less than 10 wt% with respect to the total fiber weight of the radius filler, and the braided radius filler is braided according to the formula. Another object of the invention relates to a method for producing said radius filler and to a composite material comprising said radius filler.)

1. Braided preformed radius filler comprising at least three carbon yarns, wherein at least one carbon yarn is a continuous carbon filament yarn and wherein the at least three carbon yarns are braided with each other, characterized in that the at least one continuous carbon filament yarn comprises a concentration of resin composition of 1 to 10 wt. -% with respect to the weight of the fibers of the continuous carbon filament yarn and the total amount of resin within the overall braided preformed radius filler is less than 10 wt. -% with respect to the total weight of the fibers of the braided preformed radius filler, and the braided preformed radius filler comprises only carbon yarns, and the braiding step is based on the following formula, whereby the braiding angle α is at least 18 °:

braiding angle α ═ arccosine ((n (cy) t (cy))/((a (cy) d (cy) -n (ud) t (ud)))

Wherein

n (cy) is the number of carbon yarns

T (cy) is the titer in tex of the carbon yarn

A (cy) is in mm²Cross-sectional area of carbon yarn of meter

d (cy) is in g/cm³Density of carbon yarn

n (UD) is the number of unidirectionally oriented carbon yarns

T (UD) denier in tex of unidirectionally oriented carbon yarn

2. The braided preformed radius filler of claim 1, wherein the braiding angle α is in the range of 20 ° to 45 °.

3. The braided preformed radius filler of claim 1 or 2, wherein the resin composition comprises a first resin and a second resin composition, wherein the first resin composition is impregnated into the at least one continuous carbon filament yarn and the filaments of the at least one continuous carbon filament yarn are at least partially connected via the first resin composition, and the second resin composition is located outside the bundle of the at least one continuous carbon filament yarn in the form of particles or droplets of reinforcing fiber filaments attached to the at least one continuous carbon filament yarn.

4. The braided preformed radius filler of any preceding claim, wherein all of the carbon yarns are continuous carbon filament yarns.

5. The braided preformed radius filler of claims 1-3, wherein at least one carbon yarn is made of staple fibers and/or staple fibers.

6. The braided preformed radius filler of any preceding claim, wherein all carbon yarns contain the resin composition at a concentration of 1 to 10 weight percent relative to the weight of fibers of each carbon yarn.

7. Braided preformed radius filler according to at least one of the preceding claims, wherein the braided preformed radius filler has a triangular, square, cylindrical or polygonal cross-sectional shape.

8. The woven preform radius filler according to claim 3, wherein the first resin composition contains at least two bisphenol A epichlorohydrin resins H1 and H2 in a weight ratio H1: H2 of 1.1 to 1.4, wherein H1 has an epoxy value of 1850 to 2400mmol/kg and an average molecular weight Mn of 800 to 1000g/mol and is solid at ambient temperature, and H2 has an epoxy value of 5000 to 5600mmol/kg and an average molecular weight Mn of <700g/mol and is liquid at ambient temperature, and the at least one continuous carbon filament yarn has a first resin composition of 0.1 to 2 wt% relative to the total weight of the at least one continuous carbon filament yarn.

9. The woven preformed radius filler according to claim 3 or 8, wherein the second resin composition contains at least 50% by weight of bisphenol a epichlorohydrin resin H3 having an epoxy value of 480 to 645mmol/kg and an average molecular weight Mn of 2700 to 4000g/mol, aromatic polyhydroxy ether P2, polyamide or thermoplastic polyurethane resins or mixtures of these compounds, wherein these compounds have a melting temperature of 110 to 150 ℃.

10. The braided preformed radius filler of claim 3, wherein the second resin composition is solid at ambient temperature, meltable at elevated temperature and present outside the bundle at a concentration of 0.5 to 10 weight percent relative to the total weight of the at least one continuous carbon filament yarn, and wherein at least 50% of the surface outside the bundle of the at least one continuous carbon filament yarn is free of the second resin composition.

11. The braided preformed radius filler of claim 3, wherein the bundle of at least one continuous carbon filament yarn is free of the second resin composition therein.

12. The braided preformed radius filler of claim 3, wherein the bundle of at least three carbon yarns is devoid of the second resin composition therein.

13. The woven preform radius filler of claim 3, wherein the first resin composition further comprises an aromatic polyhydroxy ether P1 having an acid number of 40 to 55mg KOH/g and an average molecular weight Mn of 4000 to 5000 g/mol.

14. Braided preformed radius filler according to at least one of the preceding claims, wherein the at least one continuous carbon filament yarn has 6000 to 48,000 filaments with a linear density of 400 to 32,000tex measured according to EN ISO2060: 1995.

15. Process for producing a braided preformed radius filler, wherein at least three carbon yarns are braided together according to claim 1, whereby at least one of said at least three carbon yarns is a continuous carbon filament yarn, characterized in that said at least one continuous carbon filament yarn contains a resin composition in a concentration of 1 to 10% by weight relative to the weight of the fibres of the continuous carbon filament yarn, and the total amount of resin in the radius filler is less than 10% by weight relative to the total weight of the fibres of the radius filler.

16. A composite material comprising the braided radius filler of claim 1.