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Methods of making thermoplastic fiber composites and webs

A technology of fiber materials and composite materials, applied in the field of manufacturing composites including thermoplastic particles and lignocellulosic fibers, to achieve uniform filler distribution, improve dehydration, and reduce costs

Active Publication Date: 2020-10-16
STORA ENSO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the incorporation of fillers into the matrix is ​​particularly challenging for semi-dry or dry batches

Method used

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  • Methods of making thermoplastic fiber composites and webs
  • Methods of making thermoplastic fiber composites and webs
  • Methods of making thermoplastic fiber composites and webs

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Embodiment Construction

[0045] Definition of Precipitated Calcium Carbonate (PCC)

[0046] Almost all PCC is made by the direct carbonation of slaked lime, known as milk of lime. Slaking lime with water to form Ca(OH) 2 , and to precipitate calcium carbonate (insoluble in water), slaked lime is combined with (captured) carbon dioxide. PCC can then be used in the paper industry as filler or pigment, mineral or coated mineral or in plastic or barrier layers. It can also be used as a filler in plastics or as an additive in household care products, toothpaste, food, pharmaceuticals, paints, inks, etc.

[0047] Definition of Online Precipitated Calcium Carbonate Process

[0048] "On-line production" means producing precipitated calcium carbonate (PCC) directly in the papermaking raw material stream, i.e. combining captured carbon dioxide with slaked lime milk in-line, rather than producing PCC separately from the papermaking process. The separate production of PCC further requires the use of reten...

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Abstract

A method for forming a thermoplastic composite material in a paper machine, wherein said method comprises the steps of: forming an aqueous fibrous material suspension; contacting said fibrous suspension with at least one additive, said additive being introduced into said In a fiber suspension, whereby said additive reacts to form a precipitated product on or in the fibers, thereby forming an intermediate suspension into which, after forming said intermediate suspension, a plastics material is introduced, thereby A plastic fiber composite suspension is formed.

Description

technical field [0001] The present invention relates to a method of manufacturing a composite comprising thermoplastic particles and lignocellulosic fibers. [0002] Background of the invention [0003] At present, wood-plastic composites can be made by making masterbatches, or wood (or wood)-plastic composites can be made from the intermediate products of thermoplastic granules, fillers, fibers and other additives, in which by mixing The compound is dried and the masterbatch is thus obtained to manufacture said masterbatch. In some cases, it is also possible to prepare this product as a final composition, ie without further compounding (mixing) with plastics. A problem with dry mixing or compounding is ensuring that the wood fibers are evenly distributed into the plastic matrix. Another challenge is ensuring that the fibers are compatible with the plastic. In the latter case, a compatibility agent or coupling agent is used to enhance adhesion. The addition of these subst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/70C08K9/02D21H13/12D21H17/33D21H17/67
CPCD21H17/70D21H13/14D21H13/24D21H17/35D21H17/53D21H17/675D21H17/71D21H13/12C08K9/02D21H17/33D21H17/67D21H17/28D21H17/37
Inventor K.巴克福克
Owner STORA ENSO OYJ
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