WO2018057451A1 - Papier revêtement antiadhésif siliconé pouvant être remis en pâte pourvu d'une couche soluble - Google Patents

Papier revêtement antiadhésif siliconé pouvant être remis en pâte pourvu d'une couche soluble Download PDF

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Publication number
WO2018057451A1
WO2018057451A1 PCT/US2017/051999 US2017051999W WO2018057451A1 WO 2018057451 A1 WO2018057451 A1 WO 2018057451A1 US 2017051999 W US2017051999 W US 2017051999W WO 2018057451 A1 WO2018057451 A1 WO 2018057451A1
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WO
WIPO (PCT)
Prior art keywords
paper
silicone
water
coating
soluble
Prior art date
Application number
PCT/US2017/051999
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English (en)
Inventor
Michael Joyce
Original Assignee
Western Michigan University Research Foundation
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 Western Michigan University Research Foundation filed Critical Western Michigan University Research Foundation
Priority to CA3035078A priority Critical patent/CA3035078A1/fr
Publication of WO2018057451A1 publication Critical patent/WO2018057451A1/fr
Priority to US16/353,063 priority patent/US20190203420A1/en

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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/824—Paper comprising more than one coating superposed two superposed coatings, both being non-pigmented
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/026—Separating fibrous materials from waste
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/13—Silicon-containing compounds
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/30—Alginic acid or alginates
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/32—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming a linkage containing silicon in the main chain of the macromolecule
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/001—Release paper
    • 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
    • B32B2255/12—Coating on the layer surface on paper 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • 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
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • 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
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • 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
    • B32B2519/00—Labels, badges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • Paper is a porous material composed of cellulose fibers that can be rea
  • waste paper contains reusable fiber if the fibers can be separated from their non-cellulosic impurities during the recycling process.
  • collected wastepaper and water is added to a pulper, which breaks apart (disintegrates) the paper into individual fibers by mechanical action. This is followed by various stages of cleaning and screening to obtain fibers that are as pure as possible to prevent or reduce problems that may otherwise occur during re-use in a papermaking process.
  • Release papers serve as a disposable base layer to carry the labels through conversion and dispensing. Release papers are also used in the manufacturing of self-adhesive materials and components for tapes, industrial and graphic applications. Methods for obtaining release papers for adhesives are typically based on at least one of three known chemistries: silicone, chrome complexes, and extruded PE (polyethylene). However, backing paper that has been made utilizing these known chemistries may create difficulties during recycling of paper.
  • One aspect of the present disclosure is a method making repulpable paper.
  • the method includes coating at least a portion of a sheet of paper with a water-soluble material. At least a portion of the water-soluble material is coated with a silicone material to form a silicone release paper.
  • the method may include providing label stock having adhesive on at least one side thereof, and releasably adhering the label stock to the silicone release paper by bringing the adhesive into contact with the silicone material.
  • the silicone material may initially comprise a silicone polymer, a crosslinker, and a catalyst.
  • the silicone material may be selected from a group consisting of solvent- based silicone, water-based silicone, and solvent-less silicone.
  • the water-soluble material may comprise sodium alginate and partially hydrolyzed polyvinyl alcohol.
  • the water soluble material may comprise a water soluble polymer.
  • the water soluble polymer may be selected from the group consisting of carboxymethylated cellulos, ethylated starch, and carboxylated soy protein.
  • the water soluble material may form a coating having a coat weight of about 2.0-6.0 gsm.
  • the silicone material may form a coating having a coat weight of about 2.0-100.0 gsm.
  • the method may include repulping the paper after coating the paper with water-soluble material and silicone material. Repulping the paper may include bringing the water-soluble material into contact with water.
  • the paper may be soaked in water for at least about 30 minutes or at least about 60 minutes.
  • a hydrapulper machine may be utilized to repulp the paper.
  • the paper may be soaked in water prior to placing the paper into a hydropulper machine. Repulping the paper may result in less than about 15% rejects according to predefined criteria.
  • the % rejects may comprise oven dried rejects divided by the product of the consistency of the paper and the total mass of the paper.
  • Another aspect of the present disclosure is a method of making repulpable paper.
  • the method includes coating at least a portion of a sheet of paper with a layer of dissolvable sacrificial material. At least a portion of the dissolvable sacrificial material is coated with a release material having non-stick properties.
  • the dissolvable sacrificial layer may be dissolved in water, and the release material may comprise silicone.
  • Fig. 1 is a schematic cross sectional view showing the layers of a typical silicone release paper
  • Fig. 2 shows a condensation reaction between a polymer and a crosslinker to form a cross linked silicone network
  • Fig. 3 is a chart showing % rejects for various materials
  • Fig. 4 is a chart showing tensile load for repulped samples utilizing different
  • Fig. 5 is a chart showing tensile extension for different materials.
  • Fig. 6 is a graph showing Oxford Twin X XRF Silicone Content Test Results.
  • a typical silicone release paper 1 includes label stock 2 that is adhered to a silicone layer 6 by adhesive 4. Silicone 6 is disposed on surface size 8 of a base sheet of paper 10.
  • a typical silicone release coating includes a silicone
  • Silicone may be used to produce release papers due to its very low surface
  • the silicone molecule also has a low molecular polarity, which facilitates binding or crosslinking of the silicone to the cellulose fibers in paper.
  • Three different types of silicones used for the manufacture of release papers are: solvent-based, water-based, and solvent-less. While the use of these materials provides performance for a broad range of adhesives, release liners produced from these materials are not repulpable or recyclable. Chrome complexes represent a potential environmental hazard due to their chromium content and the resulting problems of heavy metals. PE extruded papers are also not recyclable because the PE polymer cannot be disintegrated in a typical repulper.
  • Non-recyclable release liners result in significa nt cost because non-recyclable release liners must be sent to a landfill or incinerated. Silicone coatings are typically not recyclable because the silicone cannot be completely separated from the fibers. Even trace amounts of silicone in a recycle stream may cause spots on the resulting paper and/or build up on a paper machine, resulting in expensive down time for cleaning.
  • the present disclosure provides for the application of a water-soluble sacrificial coating layer to a low porosity, smooth base paper, such as an MG paper, to provide repulpability of such papers.
  • the water-soluble coating layer may be of sufficient thickness to completely cover the surface of the paper to prevent penetration of the silicone into the network of paper fibers. It will be understood that providing sufficient thickness does not necessarily imply a specific coverage.
  • Completely covering the surface of the fibers with a sacrificial coating layer permits the removal of a silicone release coating applied over the sacrificial coating upon immersion in water. Specifically, the underlying sacrificial layer is re-solubilized when the coated fibers are immersed in water, thereby permitting removal of the silicone release coating.
  • a sacrificial layer of sodium alginate and partially hydrolyzed polyvinyl alcohol may be utilized.
  • other water soluble polymers such as carboxymethylated cellulose, ethylated starch, and carboxylated soy protein could also be used.
  • a commercial grade Duncote Ultra, Lightweight Coated, paper was used as the basepaper to fabricate test samples.
  • first and second samples of the paper were coated with first and second different water-soluble polymers, respectively, using different Myer rods to obtain approximately the same coat weight (3.0-4.0 gsm) on the first and second test samples.
  • the first and second water soluble polymers used were sodium alginate, S-15-C ("alginate”) (available from SNP Inc.) and PVA, Selvol 2035
  • the alginate was formulated to an 8.0% solution (by weight) by slowly adding the alginate to water and allowing it to mix for about 30 minutes.
  • the PVA was formulated to a 28% solution (by weight) by adding the dry powder into room temperature water under a mixer. The contents were then heated on a steam table under agitation until the PVA was completely dissolved.
  • the actual coat weights applied were 3.84 (+ 0.19) gsm for the alginate and 4.05 (+ 0.14) gsm for the PVA. Coat weights were measured gravimetrically using a Labwave CEM solids analyzer.
  • the first test sample was coated with Sylgard ® -184 (Dow Corning) silicone mixed in the recommended 10:1 ratio of silicone to cross-linker, and the second test sample was coated with Wacker 944
  • Dehesive ® 944 silicone release coating (available from Wacker Chemie AG) using a low SiH formulation consisting of 60.35% Dehesive ® 944, 37.59% toluene, 0.3% Crosslinker V90, and 1.76% Catalyst C 05.
  • the first and second test samples were dried in a thermal oven at 257°F for 20 minutes. After drying, a silicone cure test was performed by measuring the tape adhesion properties using Scotch ® brand cellophane tape 610 to ensure a complete cure had been achieved. All test samples showed no degree of detackification.
  • the first and second test samples were conditioned in a TAPPI standard control room (50% RH and 85°F) for 24 hours and the coat weights of the applied silicone was measured.
  • the high coat weight of the Sylgard ® in comparison to the Wacker product is likely due to the extremely high viscosity of the Sylgard ® .
  • hydrapulper was increased to 700 rpm and held at this speed for 20 minutes. After 20 minutes the hydrapulper was discharged and the consistency of the repulped material was measured.
  • test sample A portion of each test sample was then taken and weighed for screening.
  • % rejects is found using an equation that divides the weight of over dried fiber in reject stream by the total mass of oven dried fiber in the input stream.
  • the consistency is the weight of oven dried fiber/oven dried fiber+water. All terms are defined by industry standards and the 15% is set by the RPTA.
  • the consistencies of the accepts were measured to enable the mass required to produce a 1.2g oven dried TAPPI standard hand sheet to be determined.
  • TAPPI standard method T-205 procedures After allowing the hand sheets to condition for a minimum of 24 hours the weight of each test sample was measured using a Mettler (AE 260) 3-point scale to enable the calculation of tensile index values. Tensile tests were performed according to TAPPI standard T-494 using an Instron Tensile Tester. Peak load and extension were tested. Ten tests were performed for each sample. The water absorptivity of each sample was also measured using a FTA dynamic contact angle apparatus. Both sides of the samples were tested utilizing an Oxford Instruments Lab-X 3000 EDRF (X-Ray) unit calibrated for silicone coat weights.
  • basepaper as the control to determine baseline of Si present, from clay, prior to silicone coating.
  • the roughness and permeability of the samples prior to application of the silicone were measured using a Parker Print-Surf, Model No. ME-90 instrument.
  • a soft-backing plate was used at both 500 and 1000 kPa.
  • the Commercial silicone release paper has the highest silicone content present.
  • the handsheets having the lowest silicone content are those of the Duncote/Wacker and Duncote/Alginate/Sylgard.
  • a decrease in silicone content may be seen between the Duncote/Sylgard and Duncote/Alginate/Sylgard samples, showing the alginate sacrificial layer decreased the amount of silicone carried over into the accepts stream.
  • the application of a water-soluble sacrificial pre- coat prior to the application of a silicone release coating resulted in the majority of the silicone being separated and removed during the repulping process.
  • the lower level of rejects obtained by first applying the sacrificial layer decreased the percent rejects to a level that meets the Recycled Paperboard Technical Association (RPTA) requirements (less than 15%) to be achieved.
  • RPTA Recycled Paperboard Technical Association
  • the application of a water soluble layer successfully enabled a silicone release paper product to be repulped by use of conventional repulping and recycling processing methods.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de production et de remise en pâte de papier présentant un revêtement antiadhésif siliconé comprenant l'étape consistant à produire du papier présentant un revêtement antiadhésif siliconé qui est initialement fixé au papier au moyen d'un matériau soluble. Pendant la production du papier, une couche soluble dans l'eau peut être appliquée sur une surface de papier, et une couche antiadhésive siliconée est ensuite appliquée sur la couche soluble dans l'eau. Lors du remouillage du papier pendant la remise en pâte, la couche soluble dans l'eau se dissout, ce qui permet la séparation de la couche antiadhésive siliconée du papier. Le revêtement antiadhésif siliconé pouvant être remis en pâte permet la récupération de fibres de papier à l'aide de procédés de remise en pâte et de recyclage classiques.
PCT/US2017/051999 2016-09-20 2017-09-18 Papier revêtement antiadhésif siliconé pouvant être remis en pâte pourvu d'une couche soluble WO2018057451A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA3035078A CA3035078A1 (fr) 2016-09-20 2017-09-18 Papier revetement antiadhesif silicone pouvant etre remis en pate pourvu d'une couche soluble
US16/353,063 US20190203420A1 (en) 2016-09-20 2019-03-14 Repulpable silicone release liner paper with dissolvable layer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662396926P 2016-09-20 2016-09-20
US62/396,926 2016-09-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/353,063 Continuation US20190203420A1 (en) 2016-09-20 2019-03-14 Repulpable silicone release liner paper with dissolvable layer

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Publication Number Publication Date
WO2018057451A1 true WO2018057451A1 (fr) 2018-03-29

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US (1) US20190203420A1 (fr)
CA (1) CA3035078A1 (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110318285A (zh) * 2019-05-21 2019-10-11 浙江工业大学义乌科学技术研究院有限公司 一种固色环保格拉辛纸及其制备方法
CN115387149A (zh) * 2022-08-25 2022-11-25 浙江创豪新材料有限公司 一种转印纸及其制造方法

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EP0801603B1 (fr) * 1995-01-05 2002-04-17 A*Ware Technologies, L.C. Feuille portant un revetement et son procede de fabrication

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CN115387149B (zh) * 2022-08-25 2023-07-14 浙江创豪新材料有限公司 一种转印纸及其制造方法

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