Method for producing a cellulose paper material from used textiles

A technology of cellulose and textiles, applied in the field of paper materials, can solve problems such as fiber shortening and rejection, and achieve the effect of reducing false hits, efficient and robust methods

Pending Publication Date: 2022-01-04
LENZING AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, on multiple recycles, the fibers are shortened and must be removed from circulation

Method used

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  • Method for producing a cellulose paper material from used textiles

Examples

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Embodiment Construction

[0102] Before describing the exemplary embodiments with reference to the drawings, some basic considerations should be outlined upon which the exemplary embodiments of the present invention are derived.

[0103] According to an exemplary embodiment, suitable processing steps within the scope of the manufacturing process influence the properties of the prepared raw material and influence the properties of the paper made from such pulp: i) short cooking times in NaOH resulting in Chain lengths are largely maintained in the resulting pulp, ii) remove too short chain lengths from the manufacturing process, iii) reduce metal oxides from old textiles (bonding, filtration, etc.), iv) pass Choose old textiles (or recycle raw materials), reduce synthetic fibers (polymers), v) control cooking time, cooking temperature, etc. This achieves < 5% of each polymer fiber type in the resulting pulp, vi) reactive generation and conversion or removal of metal oxides and / or synthetic polymers by a...

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Abstract

The invention relates to a method for producing a cellulose paper material (150). The method comprises: i) providing (105) used textiles as a starting material (101), the used textiles containing cellulose and non-cellulose foreign substances (in particular synthetic plastics and / or metal oxides); ii) at least partially depleting (120) the cellulose of the non-cellulose foreign substances to provide a depleted starting material (110); and iii) forming (170) the cellulose paper material (150) from the depleted starting material (110). The invention also relates to a cellulose paper material (150) consisting of recycled used textiles and to the use of used textiles for providing a cellulose paper material (150).

Description

technical field [0001] The invention relates to a method for producing cellulose paper stock. The invention also relates to a cellulose paper stock from recycled old textiles. The invention also relates to the use of old textiles to provide cellulosic paper stock. The invention also relates to a method for screening old textiles containing cellulose and a method for identifying cellulose paper stock. [0002] Thus, the present invention may relate to the technical field of recycling old textiles. Furthermore, the invention may relate to the technical field of manufacturing paper stock. Background technique [0003] Paper products such as paper or cardboard are mainly made from raw material wood. However, this may not necessarily be considered desirable in terms of resources and environmentally friendly manufacturing. Therefore, a supplement or an alternative to this is the recycling of waste paper. However, when recycled materials are used as raw materials for cellulos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/02D21C5/00D01G11/00D21B1/10D21H13/12D21H11/14
CPCD21B1/028D21C5/00D01G11/00D21B1/10D21H13/12D21H11/14Y02W30/64Y02W30/66D21H13/20
Inventor 理查德·赫瑟尔克里斯蒂安·维拉克
Owner LENZING AG
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