Tape of multiple sheathed continuous multifilament bundles

Abstract

The present invention relates to a belt comprising a plurality of sheathed continuous multifilament bundles, wherein each sheathed continuous multifilament bundle includes a longitudinally extending core and a polymeric sheath closely surrounding the core, wherein each each core includes an impregnated continuous multifilament tow comprising at least one continuous glass multifilament tow, wherein the at least one continuous glass multifilament tow is impregnated with an impregnating agent, the amount of impregnating agent 0.50 - 15.0 wt %, such as 0.5 - 10.0 wt % or such as 10.0 - 15.0 wt %, based on the sheathed continuous multifilament tow, wherein the melting point of the impregnating agent is at least 20°C lower than the melting point of the thermoplastic polymer composition, The viscosity at 160°C is 2.5-200 cSt, wherein the continuous glass multifilament bundle comprises up to 2 wt% by weight of the sizing composition, wherein the polymer sheath consists of a thermoplastic polymer composition, wherein the thermoplastic polymer combines The material comprises at least 60 wt %, for example at least 80 wt % thermoplastic polymer, wherein the amount of impregnated continuous multifilament tow is 10-70 wt %, based on the sheathed continuous multifilament tow, wherein the amount of polymer sheath is based on The sheathed continuous multifilament tow counts as 30-90 wt%, and the sum of the amounts of the continuous multifilament tow and polymer sheath impregnated therein is 100 wt%.

Description

technical field [0001] The present invention relates to a fiber reinforced tape, a laminate produced from the tape, a method for producing the tape and the laminate, an article comprising the tape or the laminate, and the tape and laminate in applications such as Use in applications such as automotive applications. Background technique [0002] Fiber-reinforced plastics are composite materials introduced more than half a century ago and have a wide range of applications in industries such as the automotive industry. The term "composite" can apply to any combination of materials, such as a thermoplastic polymer (matrix) in which fibers (reinforcing fillers) are dispersed. The reinforced plastics industry has used different forms of glass fiber reinforced polymer matrices to produce various products. [0003] In the production of short glass fiber compositions or compounds, chopped strands of predetermined length are mixed with a thermoplastic polymer in an extruder, during ...

AI Technical Summary

Problems solved by technology

[0014] However, while such unidirectional fiberglass tapes may have the advantage of good stiffness, their impact strength is not sufficient for all applications

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