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WO2025242957A1 - Adhésif et produit en bois stratifié - Google Patents

Adhésif et produit en bois stratifié

Info

Publication number
WO2025242957A1
WO2025242957A1 PCT/FI2025/050218 FI2025050218W WO2025242957A1 WO 2025242957 A1 WO2025242957 A1 WO 2025242957A1 FI 2025050218 W FI2025050218 W FI 2025050218W WO 2025242957 A1 WO2025242957 A1 WO 2025242957A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
adhesive
wood product
layered wood
kaolin
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/FI2025/050218
Other languages
English (en)
Inventor
Sara Ceccherini
Heidi Suomela-Uotila
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UPM Kymmene Oy
Original Assignee
UPM Kymmene Oy
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 UPM Kymmene Oy filed Critical UPM Kymmene Oy
Publication of WO2025242957A1 publication Critical patent/WO2025242957A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/346—Clay
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J197/00—Adhesives based on lignin-containing materials
    • C09J197/005—Lignin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/08—Coating on the layer surface on wood layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/542—Shear strength

Definitions

  • the present disclosure relates to an adhesive comprising a binder composition combined with a hardener .
  • the present disclosure further relates to a layered wood product and to the use of kaolin for decreasing dry-out of an adhesive during the production of a layered wood product .
  • Layered wood products are generally formed by gluing together at least two veneers with an adhes ive .
  • the adhesive used plays a big role on the production process and on the properties of the layered wood products e . g . on how easily the veneers are detached and on the shear strength values of the layered wood products .
  • the inventors have recogni sed the need for an adhes ive with improved properties to be used for producing a layered wood product .
  • the adhesive comprises a binder composition combined with a hardener, wherein :
  • the hardener comprises kaolin ;
  • the adhesive comprises kaol in in a total amount of 0 . 1 - 5 weight-% based on the total weight of the adhesive .
  • a layered wood product wherein the layered wood product comprises at least two veneers that are glued together with an adhesive forming a glue line , wherein :
  • the adhesive comprises a binder composition combined with a hardener ;
  • the hardener comprises kaolin ;
  • the adhesive comprises kaolin in a total amount of 0.1 - 5 weight-% based on the total weight of the adhesive; and the glue line comprises aluminium in an amount of up to 2.5 weight-% and silicon in an amount of up to 2.5 weight-%.
  • kaolin for decreasing dry-out of an adhesive during the production of a layered wood product, by combining kaolin as hardener with a binder composition to prepare the adhesive comprising kaolin in a total amount of 0.1 - 5 weight- % based on the total weight of the adhesive.
  • the present disclosure relates to an adhesive, wherein the adhesive comprises a binder composition combined with a hardener, wherein:
  • the hardener comprises kaolin
  • the adhesive comprises kaolin in a total amount of 0.1 - 5 weight-% based on the total weight of the adhesive.
  • the present disclosure further relates to a layered wood product, wherein the layered wood product comprises at least two veneers that are glued together with an adhesive forming a glue line, wherein:
  • the adhesive comprises a binder composition combined with a hardener
  • the hardener comprises kaolin
  • the adhesive comprises kaolin in a total amount of 0.1 - 5 weight-% based on the total weight of the adhesive; and the glue line comprises aluminium in an amount of up to 2.5 weight-% and silicon in an amount of up to 2.5 weight-%.
  • the present disclosure further relates to the use of kaolin for decreasing dry-out of an adhesive during the production of a layered wood product, by combining kaolin as hardener with a binder composition to prepare the adhesive comprising kaolin in a total amount of 0 . 1 - 5 weight-% based on the total weight of the adhesive .
  • dry-out of the adhesive may be taken to refer to the phenomena, which cause or promote the starvation of the glue line , that is formed between veneers , i . e . to the los s of liquid components of the adhesive , during the production of the layered wood product . Having applied the adhesive on a veneer, the adhesive tends to start drying, i . e . liquid components may e . g . evaporate or be adsorbed by wood substrate to an excessive extent , whereby the adhesive is dried .
  • the layered wood product may be a plywood or a laminated veneer lumber product .
  • a layered wood product such as plywood, is formed by gluing together at least two wood veneers with an adhesive whereby a glue line is formed between the wood veneers .
  • the production of a layered wood product may be carried out by applying, such as spreading, an adhesive on the surface of one veneer, putting another veneer thereon such that the adhesive is between the veneers and then the same is subj ected to cold pressing followed by hot pressing to produce the layered wood product .
  • the time it takes from applying the adhesive on the surface of a veneer up to the start of the cold pressing step may be referred to as the "open time" .
  • the adhesive is applied on a veneer with a glue factor of 100 - 200 g/m 2 , 128 - 170 g/m 2 , or 140 - 150 g/m 2 .
  • glue factor may be defined as the ratio of the mass of adhesive (glue , expressed in grams ) applied to the surface of the veneer ( surface area expressed in square meters ) .
  • a long open time is usually a desired .
  • the used adhesive provided on one veneer may dry to an adverse extent before wood veneers are pres sed together, which may result in the lack of sufficient adhesion between the veneers and thus lack of sufficient attachment thereof.
  • the shear strength values of the layered wood product may be affected in an adverse manner if the adhesive is drying too fast on the veneer.
  • the lack of adhesion may be the result of the adhesive penetrating too fast into the veneer, whereby the adhesive is dried out too fast.
  • the use of kaolin has the added utility of providing an adhesive having properties resulting in plywood with better adhesion and attachment of the veneers being formed.
  • Kaolin or kaolinite as it may also be called, is a clay mineral with the chemical composition of A12Si20s (OH) 4.
  • Kaolin is considered a soft, earthy, and usually white, mineral.
  • the adhesive comprises kaolin in a total amount of 0.1 - 5 weight-%, 0.2 - 4 weight-%, or 0.25 - 3 weight-%, or 0.5 - 1.5 weight-%, or 0.7 - 1.0 weight-%, based on the total weight of the adhesive.
  • the inventors surprisingly found out that the use of such an amount of kaolin efficiently affected the properties of the layered wood product produced with the adhesive especially what comes to the pre-tack.
  • total weight is to be understood in this specification unless otherwise stated the total weight of components forming the adhesive including water .
  • the total amount of the different components/elements in the adhesive may not exceed 100 weight-%.
  • the amount in weight-% of the different components/elements in the adhesive may vary within the given ranges.
  • pre-tack as used in the current specification is to be taken as to refer to as a measurement method that may be used to determine or estimate the dry-out phenomenon of the adhesive.
  • the pre-tack may be evaluated after the cold pressing of the layered wood product.
  • the pre-tack may be evaluated on a scale of 1
  • the adhesive comprises hardener in a total amount of 0.1 - 50 weight-%, or 0.5 - 30 weight-%, or 1 - 18 weight-%, based on the total weight of the adhesive.
  • the kaolin is used as a hardener.
  • the hardener used in the adhesive may comprise also other components or materials, that then together with kaolin makes up the total amount of hardener.
  • the hardener in addition to kaolin, comprises soda, starch, flour, or any combination or mixture of two or more of these.
  • the hardener consists of kaolin.
  • the adhesive comprises the binder composition in a total amount of 50 - 99.9 weight- %, or 60 - 99.7 weight-%, or 70 - 99.5 weight-%, or 82
  • the binder composition is a lignin-based binder composition.
  • the binder composition is a lignin-based binder composition, which is prepared by polymerizing at least polymerizable substance and crosslinking agent, wherein 50 - 100 weight-%, 60 - 99 weight-%, or 70 - 97 weight-%, or 80
  • the term "lignin” may refer to lignin originating from any suitable lignin source.
  • the lignin is essentially pure lignin.
  • essentially pure lignin should be understood as at least 70 % pure lignin, or at least 90 % pure lignin, or at least 95 % pure lignin, or at least 98 % pure lignin.
  • the essentially pure lignin may comprise at most 30 % , or at most 10 % , or at most 5 % , or at most 2 % , of other components and/or impurities. Extractives and carbohydrates such as hemicelluloses can be mentioned as examples of such other components.
  • the lignin used for preparing the binder composition may be selected from a group consisting of kraft lignin, steam explosion lignin, biorefinery lignin, supercritical separation lignin, hydrolysis lignin, flash precipitated lignin, biomass originating lignin, lignin from alkaline pulping process, lignin from soda process , lignin from organosolv pulping, lignin from alkali process , lignin from enzymatic hydrolysis process , and any combination thereof .
  • the l ignin is wood based l ignin .
  • the l ignin can origi nate from softwood, hardwood, annual plants or from any combination thereof .
  • kraft lignin is to be understood in this specification, unless otherwise stated, lignin that originates from kraft black l iquor .
  • Black liquor is an alkaline aqueous solution of lignin residues , hemi cellulose , and inorganic chemicals used in a kraft pulping process .
  • the black liquor from the pulping process comprises components originating from different softwood and hardwood species in various proportions .
  • Lignin can be separated from the black l iquor by different , techniques including e . g. precipitation and filtration .
  • Lignin usually begins precipitating at pH values below 11 - 12 .
  • Different pH values can be used in order to precipitate lignin fractions with different properties .
  • These lignin fractions differ from each other by molecular weight distribution, e . g. Mw and Mn, polydispersity, hemicellulose and extractive contents .
  • the molar mass of lignin precipitated at a higher pH value is higher than the molar mass of lignin precipi tated at a lower pH value .
  • the molecular weight distribution of lignin fraction precipitated at a lower pH value is wider than of l ignin fraction precipitated at a higher pH value .
  • the precipitated lignin can be purified from inorganic impurities , hemicellulose and wood extractives using acidic washing steps . Further purification can be achieved by filtration .
  • flash precipitated lignin should be understood in this specification as lignin that has been precipitated from black liquor in a continuous process by decreasing the pH of a black liquor flow, under the influence of an over pressure of 200 - 1000 kPa, down to the precipitation level of lignin using a carbon dioxide based acidifying agent, preferably carbon dioxide, and by suddenly releasing the pressure for precipitating lignin .
  • the method for producing flash precipitated lignin is disclosed in patent application FI 20106073 .
  • the residence time in the above method is under 300 s .
  • the flash precipitated lignin particles having a particle diameter of less than 2 pm, form agglomerates , which can be separated from black liquor using e . g. filtration .
  • the advantage of the flash precipitated lignin is its higher reactivity compared to normal kraft lignin .
  • the flash precipitated lignin can be purif ied and/or activated if needed for the further processing .
  • the l ignin may be derived from an al kali process .
  • the alkali process can begin with liquidi zing biomass with strong alkali followed by a neutrali zation process . After the alkali treatment , the l ignin can be precipitated in a similar manner as presented above .
  • the lignin may be derived from steam explosion .
  • Steam explosion is a pulping and extraction technique that can be applied to wood and other fibrous organic material .
  • biorefinery lignin is to be understood in this specification, unless otherwise stated, lignin that can be recovered from a refining facility or process where biomass is converted into fuel , chemicals and other materials .
  • supercritical separation lignin is to be understood in this specification, unless otherwise stated, lignin that can be recovered from biomass using supercritical fluid separation or extraction technique .
  • Supercritical conditions correspond to the temperature and pres sure above the critical point for a given substance . In supercritical conditions , distinct liquid and gas phases do not exist .
  • Supercritical water or liquid extraction is a method of decomposing and converting biomass into cellulosic sugar by employing water or liquid under supercritical conditions . The water or liquid, acting as a solvent , extracts sugars from cellulose plant matter and lignin remains as a solid particle .
  • the lignin may be derived from a hydrolysis process .
  • the lignin derived from the hydrolysis process can be recovered from paper-pulp or wood-chemical processes .
  • the lignin may originate from an organosolv process .
  • Organosolv is a pulping technique that uses an organic solvent to solubili ze lignin and hemicellulose .
  • the binder composition is a phenolic resin -based binder composition .
  • a binder composition may be a phenol-f ormaldehyde binder composition .
  • the polymeri zing agent may in addition to lignin comprise a compound selected from the class of phenols .
  • the term "compound selected from the clas s of phenols” should be understood as meaning a fossil-based compound of phenols . I . e . phenol s are compounds consisting of a single aromatic ring where to one or more hydroxyls (— OH) are bonded .
  • the compound selected from the class of phenols may be selected from a group consisting of phenol , cresol , resorcinol , and any combinations thereof .
  • the compound selected from the clas s of phenols is phenol . Such phenols are toxic compounds .
  • no compound selected from the class of phenols is used in the binder composition .
  • a binder composition such as a lignin-based binder composition
  • the binder composition produced may thus be free of fos sil-based phenol compound ( s ) .
  • the binder composition as disclosed in the current specification may thus be prepared as a nontoxic binder composition . I . e . a binder composition with reduced share of toxic or hazardous compounds may be prepared.
  • the binder composition as disclosed in the current specification may be prepared as a binder composition having 100 % biological origin. Thus, all the components used for preparing the binder composition may be of biological origin and thus no fossil-based components may need to be used.
  • the crosslinking agent may be an aldehyde, such as formaldehyde or paraformaldehyde.
  • the aldehyde is prepared from bio-methanol.
  • the aldehyde may thus be of biobased origin.
  • the aldehyde may alternatively be of fossil origin.
  • the aldehyde is prepared from methanol.
  • the binder composition may be prepared by polymerizing the crosslinking agent and the polymerizable substance in an aqueous composition under heating at a temperature of 60 - 95 °C, or 75 - 90 °C, or 70 - 80 °C, or 70 - 90 °C. The heating may be continued until a binder composition with a desired viscosity value is formed .
  • the adhesive comprises a binder composition combined with a hardener and at least one surfactant, wherein the adhesive comprises the at least one surfactant in a total amount of up to 0.5 weight-%, or 0.005 - 0.45 weight-%, or 0.01 - 0.4 weight- % , based on the total weight of the adhesive.
  • the adhesive comprises water .
  • the at least one surfactant agent may be selected from a group consisting of anionic surfactant, nonionic surfactant, cationic surfactant, amphoteric surfactant, silicon surfactant, polymeric surfactant, and any combination or mixture thereof.
  • the at least one surfactant agent may be selected from a group consisting of ethoxylates, carboxylates, alcohol alkoxylates, diols, fatty acid esters of polyols/polyhydroxy compounds, siloxanes, and any combination or mixture thereof .
  • the surfactant may have the added utility of affecting the kaolin by helping the swelling thereof.
  • the surfactant may further have the added utility of being able to retain water e.g. lessen the dry-out.
  • the surfactant may affect the viscosity of the adhesive.
  • the glue line comprises aluminium in an amount of 0.1 - 2.5 weight-%, or 0.15 - 2 weight-%, or 0.2 - 1.5 weight-%, or 0.25 - 1 weight-%, or 0.3 - 0.55 weight-%, or 0.35 - 0.50 weight-%, or 0.4 - 0.45 weight-%.
  • the glue line comprises silicon in an amount of 0.1 - 2.5 weight-%, or 0.15 - 2 weight-%, or 0.2 - 1.5 weight-%, or 0.25 - 1 weight-%, or 0.3 - 0.55 weight-%, or 0.35 - 0.50 weight- % , or 0.4 - 0.45 weight-%.
  • the amount of aluminium and of silicon in the glue line may be determined with an Energy-dispersive X-ray spectroscopy (EDS, which may also be abbreviated EDX or XEDS) detector.
  • EDS is an analytical technique that enables the chemical charac- terization/elemental analysis of materials.
  • a sample excited by an energy source (such as the electron beam of an electron microscope) dissipates some of the absorbed energy by ejecting a core-shell electron.
  • a higher energy outer-shell electron then proceeds to fill its place, releasing the difference in energy as an X- ray that has a characteristic spectrum based on its atom of origin. This allows for the compositional analysis of a given sample volume that has been excited by the energy source.
  • the layered wood product has a shear strength (soaking) of 0.5 - 2.8 N/mm 2 , or 0.6 - 2.5 N/mm 2 , or 0.8 - 2.2 N/mm 2 , as measured in accordance with standards SFS-EN 314-1 (2005) and SFS-EN 314-2 (1993) .
  • the layered wood product has a shear strength (boiling) of 0.5 - 2.8 N/mm 2 , or 0.6 - 2.5 N/mm 2 , or 0.8 - 2.2 N/mm 2 , as measured in accordance with standards SFS-EN 314-1 (2005) and SFS-EN 314-2 (1993) .
  • the layered wood product exhibits a wood failure (soaking) value of 60 - 100 %, or 70 - 100 %, or 75 - 100 %, or 80 - 100 %, as measured in accordance with standards SFS-EN 314-1 (2005) and SFS-EN 314-2 (1993) .
  • the layered wood product exhibits a wood failure (boiling) value of 60 - 100 %, or 70 - 100 %, or 75 - 100 %, or 80 - 100 %, as measured in accordance with standards SFS-EN 314-1 (2005) and SFS-EN 314-2 (1993) .
  • the adhesive as disclosed in the current specification has the added utility that the use of which for producing a layered wood product may result in the layered wood product exhibiting both shear strength values and wood failure values needed for the layered wood product to be used for further applications.
  • the adhesive as disclosed in the current specification has the added utility of exhibiting decreased dry-out phenomenon.
  • the adhesive as disclosed in the current specification has the added utility enabling a long open time to be used during the production of a layered wood product without drying to an adverse extent .
  • Using the adhesive as disclosed in the current specification for producing layered wood products has the added utility of resulting in layered wood products exhibiting high shear strength values and high wood failure values.
  • Phenol-formaldehyde-based binder composition PF
  • LPF500 and LPF650 lignin-based binder compositions
  • LPF500 50 weight-% of the polymeri zable substance used for preparing the lignin-binder composition was lignin ( kraft lignin) while the rest being phenol .
  • LPF650 65 weight-% of the polymeri zable substance used for preparing the lignin-binder composition was lignin ( kraft lignin) while the rest being phenol .
  • Formaldehyde was used as the crosslinking agent when producing the binder compositions .
  • binder compositions were prepared by polymeri zing the crosslinking agent with the polymeri zable substance ( s ) in an aqueous composition under heating .
  • the prepared adhesives were then combined with kaolin and some also with a surfactant .
  • the reference samples did not contain any kaolin or surfactant .
  • the prepared adhesives were then used to prepare plywood samples by applying the prepared adhesive by a roller and allowing the adhes ive to remain there for a predetermined open time before subj ecting to cold pressing ( 1 N/mm 2 , 10 min) .
  • the cold pressing was followed by hot pressing.
  • the hot pressing conditions were the following:
  • the formed plywood samples were subjected to the following testing:
  • the amount of aluminium and silicon in the glue line was analyzed with an energy-dispersive X-ray spectroscopy (EDS) detector after hot pressing.
  • EDS energy-dispersive X-ray spectroscopy
  • the wood failure (soaking) , the shear strength (soaking) , the wood failure (boiling) , and the shear strength (boiling) were determined in accordance with standards SFS-EN 314-1 (2005) and SFS-EN 314-2 (1993) .
  • the embodiments described hereinbefore may be used in any combination with each other . Several of the embodiments may be combined together to form a further embodiment .
  • An adhesive , a layered wood product , or a use , as disclosed herein, may comprise at least one of the embodiments described hereinbefore .
  • the benefits and advantages described above may relate to one embodiment or may relate to several embodiments .
  • the embodiments are not limited to those that solve any or all of the stated problems or those that have any or all of the stated benefits and advantages .
  • reference to ' an ' item refers to one or more of those items .
  • the term "comprising" is used in this specification to mean including the feature ( s ) or act ( s ) followed thereafter, without excluding the presence of one or more additional features or acts .

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un adhésif comprenant une composition de liant combinée à un durcisseur, le durcisseur comprenant du kaolin, et l'adhésif comprenant du kaolin en une quantité totale de 0,1 à 5 % en poids sur la base du poids total de l'adhésif. L'invention concerne en outre un produit en bois stratifié et l'utilisation de kaolin pour diminuer le séchage d'un adhésif pendant la production d'un produit en bois stratifié.
PCT/FI2025/050218 2024-05-24 2025-05-02 Adhésif et produit en bois stratifié Pending WO2025242957A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20245667A FI20245667A1 (en) 2024-05-24 2024-05-24 Glue and layered wood product
FI20245667 2024-05-24

Publications (1)

Publication Number Publication Date
WO2025242957A1 true WO2025242957A1 (fr) 2025-11-27

Family

ID=95825284

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2025/050218 Pending WO2025242957A1 (fr) 2024-05-24 2025-05-02 Adhésif et produit en bois stratifié

Country Status (2)

Country Link
FI (1) FI20245667A1 (fr)
WO (1) WO2025242957A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501174A1 (fr) * 1991-02-08 1992-09-02 National Starch and Chemical Investment Holding Corporation Composition durcissante pour adhésifs à base de résines urée-formaldéhyde; procédé de préparation et coffret contenant cette composition
WO1993024582A1 (fr) * 1992-06-04 1993-12-09 Casco Nobel Ab Procede pour coller des produits a base de bois

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6548625B2 (en) * 2001-03-23 2003-04-15 Cytec Technology Corp. Stable liquid melamine urea formaldehyde resins, hardeners, adhesive compositions, and methods for making same
GB201105583D0 (en) * 2011-04-01 2011-05-18 Dynea Oy System for form pressing with high production efficiency
FI126736B (en) * 2013-11-26 2017-04-28 Upm Kymmene Corp Process for treating lignin and preparing a binder composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501174A1 (fr) * 1991-02-08 1992-09-02 National Starch and Chemical Investment Holding Corporation Composition durcissante pour adhésifs à base de résines urée-formaldéhyde; procédé de préparation et coffret contenant cette composition
WO1993024582A1 (fr) * 1992-06-04 1993-12-09 Casco Nobel Ab Procede pour coller des produits a base de bois

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