Recycling bonded cellulose materials, esp. car lining parts - by crushing, mixing with binder, placing between layers of nonwoven fibre material, cutting, and hot-press moulding to produce new parts

摘要

Recycling coated or laminated moulded prods. (I) based on binder-contg. cellulose or lignocellulose materials e.g. interior linings from old cars, industrial scrap etc. comprises (a) crushing (I) to give a particulate mixt. of substrate, coating, lamination and any plastic parts (II), (b) adding a binder, (c) placing the mixt. between alternate layers of nonwoven fibre material (III) to give a multi-coated intermediate mat in the form of a strip, (d) cutting the strip into blanks, (e) hot-press moulding the blanks to form substrates etc. for car linings etc. by (f) subsequent coating and/or lamination. Crushed mixt. (II) from stage (a) has particle dia. 30 microns-6 mm. and is treated with 2-20 wt.% binder, using a mixt. of thermoplastic and thermosetting binder, pref. in the form of dry phenolic resin powder, at least 4 layers of (II)/binder are interposed between at least 5 layers of fibre (III) with layers of (III) on the outside to give a mat contg. below 25 wt.% fibre, fibre material (III) has unit wt. 8-100 g/m2, and pref. consists of PP, PE, polyester, viscose and/or polyamide fibre, different materials (III) can be used (w.r.t. type of material and unit wt.) and the intermediate strip is rolled up for storage, mixt. (II) can contain material from interior linings which have been recycled different nos. of times. USE/ADVANTAGE - The process enables interior lining parts of scrapped or crashed cars to be recycled repeatedly with no significant deterioration in product quality or prodn. conditions.