Thermoplastic reinforcement materials
AssigneeRhenoflex GmbH
InventorsHenriette Järger, Michael Deilecke
Life of this patent
Estimating the term…
Abstract
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.
Claims7
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.
Dependencies are inferred from the claim text.