| 摘要 |
Material for making biodegradable mouldings, in particular table utensils and packaging containers according to this invention consists in 95-100% w/w of loose bran, in particular the wheat one, constituting a selected bran fraction of grain size from 0.01 to 2.80 mm containing from 7% to 45% of structurally bonded water in the form of moisture and possibly in up to 5% w/w of a mixture of impregnating substances and/or fragrance and/or aroma giving additives and/or non-fibrous fillers and/or moisture retaining agents and/or colouring additives. Method of making biodegradable mouldings, in particular table utensils and packaging containers, using grain grinding products consists in that the loose bran, in particular wheat one, of grain size 0.01 to 2.80 mm in amount of 96-100% w/w containing 7% to 45% structurally bound water in the form of moisture are dry-mixed with a mixture impregnating substances and/or fragrance and/or aroma giving additives and/or non-fibrous fillers and/or moisture retaining agents and/or colouring additives in amount of up to 5% w/w; a metered quantity of the moulding material obtained is placed on part of a multipartite, preferably bipartite, mould, the mould is being closed with simultaneous exposure of moulding material placed there for several tens of seconds to temperature within a range from 20 to 450° C. and pressure within a range of 1-10 MPa and/or compressive force of up to 100 MT/cm2 at pressure of up to 320 MPa acting of a mould closing piston. |
