Method for producing shaped products from multi-layer paper, shaped product made of paper, and device for the production thereof
AssigneeOPTIMA consumer GmbH
InventorJens SCAFARTI
Life of this patent
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Abstract
A method for producing shaped products from multi-layer paper dispenses with subsequent drying steps and still allows entirely compostable shaped products to be produced that, in terms of their shape, are not limited to flat angles between flat regions. A corresponding shaped product made of paper and to a device for carrying out the method are disclosed.
Claims16
-15. (canceled)
A method for producing shaped products from multi-layer paper, comprising:
- i) feeding a plurality of paper layers arranged one above another between a positive mold and a complementary negative mold of a pressing tool with pressing surfaces, each of the paper layers having a plurality of free fiber ends on its surface;
- ii) aligning the free fiber ends transversely to top and bottom sides of the paper layers by suctioning off or feeding a gas or gas mixture, wherein a flow direction of the gas or gas mixture corresponds to a desired alignment;
- and
- iii) pressing the paper layers to form a shaped product corresponding to the positive mold and the complementary negative mold by the pressing tool.
A shaped product (11) produced from multi-layer paper,
- wherein the shaped product (11) is completely compostable, and
- wherein the shaped product (11) comprises directly adjoining flat regions (12, 13) which enclose an angle of more than 90° but less than 150°, and
- wherein paper layers of the shaped product (11) have a stretchability of 20% or more, at least in some regions, solely due to creping.
A device (1) for producing shaped products (8, 10) from multi-layer paper with a roller arrangement (2) for feeding the multi-layer paper to a pressing tool (7) with a positive mold (5) and a complementary negative mold (6) which exhibit pressing surfaces (5a, 6a) respectively,
- wherein the pressing tool (7) is heatable to 100° C. to 350° C. and at least one of the pressing surfaces (5a, 6a) is gas-permeable or perforated at least in some regions and is connected via a hose to a compressor or a vacuum pump for suctioning in or feeding a gas or gas mixture through the pressing surface (5a, 6a).
Dependencies are inferred from the claim text.