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A method for applying a film on moulded fibrous product and a product produced by said method

A fiber product and product technology, applied in the field of suction molds, which can solve the problems of film rupture, bubble formation, high discard rate, etc.

Inactive Publication Date: 2013-09-18
PAKIT INT TRADING CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A well-known problem when laminating films to products is the difficulty in obtaining a uniform film layer on three-dimensional structures with sharp edges and / or corners
A further disadvantage of lamination involving the films described in the aforementioned patents is that air bubbles may form on the pulp product and the film may rupture, which may lead to poor product quality and / or high discard rates

Method used

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  • A method for applying a film on moulded fibrous product and a product produced by said method
  • A method for applying a film on moulded fibrous product and a product produced by said method
  • A method for applying a film on moulded fibrous product and a product produced by said method

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Embodiment Construction

[0033] figure 1 is a schematic diagram of a manufacturing process for making molded fiber products, illustrating a forming section 1 for forming a molded pulp product, a drying section 2 for drying the molded pulp product, and a drying section for drying the molded pulp The post-processing part 3 where the product is subjected to post-processing steps such as trimming the edges of the pulp product, baling the pulp product, etc. The film is preferably applied to the product before or during the post-processing part 3 when the product is substantially dry.

[0034] When the film is applied, the molded pulp product is supported in a perforated mold 10, 20, which has a complementary shape to the pulp product. In the text that follows, the male porous mold is numbered 10 and the female mold is numbered 20. The porous molds 10, 20 may be of the same kind used as pulp molds in the forming section 1 during forming and subsequent pressing. Examples of suitable female and male porous...

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Abstract

The present invention relates to a permeable suction mould arranged to support a fibrous product during application of a surface film onto a surface of said fibrous product, said mould including suction carrying structure for delivery of suction to the mould surface wherein said suction carrying structure is formed by a porous structure in a sintered material.

Description

technical field [0001] The present invention relates to a permeable suction mold arranged to support a fibrous product during application of a surface film onto the surface of said fibrous product, said mold comprising a suction bearing structure for transferring suction to the mold surface . Background technique [0002] A preferred method for manufacturing three-dimensional pulp products, such as food trays, plates or cups, eg provided with tight surface layers, is disclosed in WO2006 / 057610 incorporated herein by reference. The forming process deposits virgin or recycled fibers by suction within a vat onto a sintered forming tool or forming box. After forming the box, the fibrous product is pressed and heated in a three-stage operation between closely fitted male and female dies. As a result of these three pressing and heating stages: an increase in fiber density; a smoother surface; and tension in the fiber network is built, which increases the stiffness of the final p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J5/00B29C51/10B32B29/04B65D1/34B65D25/14D21J3/00
CPCB29C51/10B29C51/14B29C51/16B29C51/365B29C51/428B29C2791/006B29K2105/0032B29K2995/006B29L2031/712B29L2031/7138B29L2031/7168B29C33/3814B29C33/3842B29C51/12B29K2101/12B29K2105/256B29K2905/10B29K2995/0067
Inventor 比约恩·尼尔松
Owner PAKIT INT TRADING CO INC
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