Thermoplastic reinforcement materials

摘要

The present invention relates to novel thermoplastic reinforcement materials, particularly for the shoe industry, and a method for the production thereof. The novel thermoplastic reinforcement materials are obtained by a preliminary production step of pre-agglomeration of plant fiber filler materials and thermoplastic hot-melt adhesives, so-called filler-plastic compounds, allowing filler material originating from very inexpensive, naturally occurring plant fibers of varying origins to be used, but in an amount up to 65% by weight, without losing the required material properties, such as strength under heat, good flexural rigidity, and surface adhesion.

主权项

1. A method for producing thermoplastic stiffening materials for the shoe industry in the form of a hot-melt adhesive/plastic compound, comprising:
pre-agglomerating a plant fibre filling material and a thermoplastic hot-melt adhesive through friction heat below the melting point of the hot-melt adhesive to form the hot-melt adhesive/plastic compound, and further processing the compound on a calender or extruder into flat sheets/flat foils, wherein the plant fibre filling material are regenerative organic plant fibres made of straw, wherein the compound has a proportion of plant fibre filling material 1-30 mm long and in a quantity of as much as 65 weight-% based on total composition weight where the compound has a bending strength of 1000-2500 N measured in conformity with DIN 53121.