WO2022187913A1 - Composition de pâte à papier moulée à partir de cellulose de chanvre - Google Patents

Composition de pâte à papier moulée à partir de cellulose de chanvre Download PDF

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Publication number
WO2022187913A1
WO2022187913A1 PCT/BG2021/000029 BG2021000029W WO2022187913A1 WO 2022187913 A1 WO2022187913 A1 WO 2022187913A1 BG 2021000029 W BG2021000029 W BG 2021000029W WO 2022187913 A1 WO2022187913 A1 WO 2022187913A1
Authority
WO
WIPO (PCT)
Prior art keywords
cellulose
hemp
composition
molded pulp
ranging
Prior art date
Application number
PCT/BG2021/000029
Other languages
English (en)
Inventor
Kalina Petrova HRISTOVA
Original Assignee
Hristova Kalina Petrova
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hristova Kalina Petrova filed Critical Hristova Kalina Petrova
Publication of WO2022187913A1 publication Critical patent/WO2022187913A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material

Definitions

  • the present invention relates to a composition of molded pulp from hemp cellulose, which will find application in the packaging industry and in particular for the manufacturing of various types of packaging for the food industry, as well as industrial packaging for electronics and automotive parts.
  • Biodegradable packaging is made entirely of plants, and their production is significantly more environmentally friendly, with less harmful emissions than traditional plastic products.
  • biopolymers from com starch; bagasse, a by-product of the sugar cane from which the sugars are derived; com symp, or sugar beet are successfully being used.
  • the produced biodegradable packaging products are successfully used to make food containers for single-use purposes, that are safe, and which degrade without damaging the environment because they are 100% biodegradable.
  • the aim of the invention is to provide a molded pulp composition from hemp cellulose which, based on industrial hemp, provides a highly efficient and environmentally friendly production of packaging of any shape, suitable for both food contact material and industrial packaging.
  • composition of molded pulp from hemp cellulose which includes the following components in the respective weight percentages in the dry state of the packages, namely: cellulose extracted from industrial hemp in the range of 90% to 100% and binding or impregnating substances in the range of 0.001% to 10%.
  • the composition of the molded pulp from hemp cellulose is comprised of only 100 wt. % of cellulose extracted from industrial hemp, where the cellulose is 95% dry matter and 5% moisture.
  • the composition of the molded pulp comprises 96 wt. % of cellulose extracted from industrial hemp and 4 wt. % of impregnating substance against water permeability and grease.
  • the problem is also solved by creating a second composition of molded pulp from hemp cellulose, which includes the following components in the respective weight percentages in the dry state of the packages, namely: cellulose extracted from industrial hemp in the range of 10% to 90%, cellulose from other sources in the range of 10% to 90% and binders or impregnating substances in the range of 0.001% to 10%.
  • the cellulose derived from industrial hemp is 48 wt. %
  • the cellulose derived from other sources is from softwood and is 48 wt. %
  • the binding chemical is alkyl ketene dimer and is 4 wt. %.
  • the pulp from other sources is derived from lignocellulosie plants such as kenaf, hay, reed or wood pulp, such as coniferous or deciduous wood.
  • the binding or impregnating agents are organic resins, or water repellents, or starch components, or additives for diy strength.
  • the advantage of the fiber molded compositions is that they offer a production of strong and biodegradable packaging of any shape. These packaging are highly resistant to ultraviolet rays, as well as mold, they have an insulating effect, which makes them suitable for contact with food and industrial packaging.
  • the industrial hemp is a culture that thrives everywhere, in full harmony with nature, as it enriches Idle soil, saves forests, and after its use leaves no residual garbage.
  • the cultivation of industrial hemp does not require the use of pesticides, herbicides, and other harmful chemicals. Its broad leaves block the sunlight and precisely because it grows quite fast and tall, other plants, especially weeds, remain in the shade and have no chance of survival. Hemp leaves the soil in excellent condition for subsequent crops and cultures. This is precisely due to the natural weeding, while its strong roots penetrate deeply into the soil, over 92 cm, aerate it, and pushes the nutrients up to the surface, which build and maintain the structure of the upper and lower layers of the soil.
  • hemp is also good at composting, as the hemp plants, by changing their leaves during the growing season, add rich organic matter to its top layer and moisturize it.
  • the stems of industrial hemp are rich in cellulose, and depending on the sort and harvest, the cellulose content in the stem part of the plant can vary between 35% - 77%, meaning that hemp contains a higher percentage of cellulose than all tree species.
  • the stems of the hemp are cut or crushed into equal parts with sizes between 1 cm and 2 cm.
  • the cut stem parts are placed in an autoclave or cooking digester, where they are boiled with a solution of NaOH at a temperature between 140 0 - 170 ° C for a period between 2 and 4 hours.
  • the resulting mixture of cellulose hemp fibers is drained from the black liquor and is refined.
  • the cellulose fibers are then purified with water.
  • the cellulose fibers can be dried or used directly to make the molded pulp.
  • the obtained cellulose fibers are placed in a tank, which constantly mixes them with water, so that when cast in different shapes, the mixture could be homogeneous. That is how the so - called fibrous pulp is formed, which is used in the manufacture of different packaging.
  • a composition for the molded pulp from hemp cellulose is created, whi h comprises the following components in the corresponding dry weight percentages, namely: cellulose extracted from industrial hemp in the range of 90% to 100% and binders or impregnating substances in the range of 0.001 % to 10%.
  • the fibrous slurry is composed of only 100 wt. % hemp cellulose, where the cellulose is 95% dry matter and 5% moisture.
  • in the fibrous slurry are not added fillers or binders, as this slurry is best suited for the manufacture of paper packaging, which is not intended to be used in contact with water.
  • the cellulose derived from industrial hemp is 96 wt. %
  • the impregnating substance against water permeability and grease is 4 wt. %.
  • the impregnating substance is in the form of added fillers and binders, for example a repellent to moisture and grease of Cartaguard KMP Liq, approved by the FDA and BfR.
  • a second composition of the molded pulp from hemp cellulose is created, wherein the cellulose extracted from industrial hemp is 48 wt. %, the cellulose from other sources is from softwood and is 48 wt.% and the binder is an alkyl ketone dimer of 4% by weight.
  • the binding or impregnating substances can be natural resins for enhancing the texture and water permeability of the packaging.
  • alkyl ketine dimer as a water repellent substance
  • other long chain diketenes could be used.
  • a starch component can be used to improve the structural hardness, while dry strength additives made from modified polyamines can be used in wet pressing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne la composition de pâte à papier moulée à partir de cellulose de chanvre, qui trouvera une application dans l'industrie de l'emballage et - plus spécifiquement pour produire divers types d'emballage - de qualité alimentaire, ainsi que des emballages industriels pour composants électroniques et automobiles. Selon l'invention, deux compositions de pâte à papier moulée à base de chanvre sont créées. La première composition comprend les composants suivants dans les pourcentages en poids respectifs, à savoir : la cellulose extraite de chanvre industriel allant de 90 % à 100 % et des liants ou des substances d'imprégnation allant de 0,001 % à 10 %. La seconde composition de pâte à papier moulée à partir de cellulose de chanvre comprend les composants suivants dans les pourcentages en poids respectifs, à savoir : la cellulose extraite de chanvre industriel allant de 10 % à 90 %, la cellulose provenant d'autres sources allant de 10 % à 90 % et des liants ou des substances d'imprégnation allant de 0,001 % à 10 %.
PCT/BG2021/000029 2021-03-09 2021-11-26 Composition de pâte à papier moulée à partir de cellulose de chanvre WO2022187913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG113337 2021-03-09
BG113337A BG67611B1 (bg) 2021-03-09 2021-03-09 Състав на формовъчна пулпа от конопена целулоза

Publications (1)

Publication Number Publication Date
WO2022187913A1 true WO2022187913A1 (fr) 2022-09-15

Family

ID=79024887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BG2021/000029 WO2022187913A1 (fr) 2021-03-09 2021-11-26 Composition de pâte à papier moulée à partir de cellulose de chanvre

Country Status (2)

Country Link
BG (1) BG67611B1 (fr)
WO (1) WO2022187913A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090012210A1 (en) * 2007-07-03 2009-01-08 Speer Drew V Biodegradable and compostable composition having improved physical and chemical properties
WO2012140237A1 (fr) * 2011-04-14 2012-10-18 Universiteit Van Amsterdam Matériau composite comprenant une biocharge et un polymère spécifique
WO2017064559A1 (fr) * 2015-10-14 2017-04-20 Fiberlean Technologies Limited Matériau en feuille post-formable en 3d

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090012210A1 (en) * 2007-07-03 2009-01-08 Speer Drew V Biodegradable and compostable composition having improved physical and chemical properties
WO2012140237A1 (fr) * 2011-04-14 2012-10-18 Universiteit Van Amsterdam Matériau composite comprenant une biocharge et un polymère spécifique
WO2017064559A1 (fr) * 2015-10-14 2017-04-20 Fiberlean Technologies Limited Matériau en feuille post-formable en 3d

Also Published As

Publication number Publication date
BG67611B1 (bg) 2024-03-15
BG113337A (bg) 2022-09-15

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