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
  • D21H19/72—Coated paper characterised by the paper substrate
  • D21H19/74—Coated paper characterised by the paper substrate the substrate having an uneven surface, e.g. crêped or corrugated 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
  • 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
  • D21H19/28—Polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
  • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
  • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
  • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
  • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
  • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
  • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
  • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
  • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
  • B31F1/2804—Methods
  • B31F1/2809—Methods characterised by the chemical composition of the glue
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
• • 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
  • D21H27/30—Multi-ply
  • D21H27/32—Multi-ply with materials applied between the sheets
  • D21H27/34—Continuous materials, e.g. filaments, sheets, nets
  • D21H27/36—Films made from synthetic macromolecular compounds

Definitions

• the present invention relates to single or double sided glued, single or multi-wall corrugated board, wherein at least one of the cover layers or waves a paper film composite comprising: i) a paper material of the grammage 30 to 600 g / m 2 and
• the present invention relates to one-sided or two-sided pasted, single or multiwall corrugated board, wherein at least one of the cover layers or waves is a paper film composite containing: i) a paper material of grammage 30 to 600 g / m 2 as an outer layer, ii) a 1 to 100 ⁇ thick, biodegradable plastic coating as an intermediate layer and
• the present invention relates to methods for producing this corrugated board.
• Polymer-coated paper products have numerous applications, especially for paper grades whose ink-jet printability can be improved by polymer coating, ie all graphic papers, natural paper, cardboard and paperboard. In all of these applications, the surface area of the paper stock is changed, which is also desirable for the aforementioned applications such as printability or barrier properties.
• Paper products coated with biodegradable polymers (blends) are known from WO2010 / 034712.
• the aim of the present invention was thus to provide corrugated board which have comparable surface properties to paper, but at the same time are wet- and oil-resistant, have a higher moisture resistance and moreover can be easily recycled.
• the corrugated board according to the invention solves this problem.
• the inner and outer surfaces are made of untreated paper material.
• the structural reinforcement sits inside the composite and improves the barrier properties such as moisture resistance, wet strength, water vapor resistance, oil resistance of the entire composite.
• the corrugated board according to the invention has significant advantages in recycling and can be recycled according to the method described in EP 09174077.9.
• the corrugated board is placed in an aqueous waste paper suspension which a) in the presence of at least one hydrolase is beaten, b) is pitched in alkaline medium, and / or c) is treated in an alkaline deinking process, and the plastic film then from the Waste paper suspension is separated.
• the process is preferably carried out in only one of the described embodiments a), b) or c).
• waste paper and the recovery of waste paper from paper products are of particular economic importance in the paper industry, since resources (pulp) can be spared in this way.
• the term "waste paper” is based on DIN 6730 and is therefore defined as paper or paperboard that is used or unused returned from production or processing and recycled as pulp to a manufacturing process in Germany alone in 2003, the waste paper rate, Waste paper is usually used as a secondary raw material in papermaking and paperboard production, but waste paper can not be recycled any number of times, with each recycling cycle the fibers are shortened due to mechanical stress and lose their weight after approx. 4 to 6 cycles the ability to reconnect to a leaf structure, which in turn negatively affects the Has paper strength.
• the corrugated board industry uses paper with new and high quality paper fibers.
• the waste paper content in the corrugated board is very low.
• the proportion of waste paper in the corrugated board according to the invention can be significantly increased and at the same time the natural shanks of the composite as the strength of the paper can be kept at a high level.
• the inner plastic coating or better the plastic film makes an important structural contribution.
• paper products covers all types of paper, and in particular cardboard and board.
• Suitable fibrous materials for the production of these paper products are all qualities customary for this purpose, e.g. Pulp, bleached and unbleached pulp, pulps from all annual plants and waste paper (also scrap, both coated and uncoated). These pulps may be used either alone or in any mixture with one another to make the pulps from which the paper products are made.
• Wood pulp includes, for example, groundwood, thermomechanical pulp (TM P), chemo-thermo-mechanical pulp (CTMP), pressure groundwood, semi-pulp, high yield pulp, and refiner mechanical pulp (RMP).
• TM P thermomechanical pulp
• CMP chemo-thermo-mechanical pulp
• RMP refiner mechanical pulp
• pulp for example, sulphate, sulphite and soda pulps come into consideration.
• Suitable annual plants for the production of pulps are, for example, rice, wheat, sugar cane and kenaf.
• sizing agents are added to the celluloses in an amount of from 0.01 to 3% by weight, preferably from 0.05 to 1% by weight, in each case based on dry paper stock, and are based on the desired degree of sizing of the papers to be finished.
• the paper material may contain other substances, such. As starch, pigments, dyes, optical brighteners, biocides, solidifiers for paper, fixing agents, defoamers, retention aids, and / or dehydrating agents.
• the central plastic layer may contain any biodegradable polymer customary for paper coating.
• biodegradable polymers are already known to the person skilled in the art and are disclosed, inter alia, in Ullmann 's Encyclopedia of Industrial Chemistry (online version 2009), Polymers, Biodegradable, Wiley-VCH Verlag GmbH & Co. KG, Weinheim, 2009, pages 131 ,
• biodegradable polymers within the meaning of the present invention includes polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), polyalkylene carbonate such as polypropylene carbonate (PPC) or polyethylene carbonate (PEC), chitosan and gluten and one or more several polyesters based on aliphatic diols and aliphatic / aromatic dicarboxylic acids such as polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), polybutylene lensuccinate sebacate (PBSSe), polybutylene adipate co-terephthalate (PBAT), polybutylene sebacate co-terephthalate (
• biodegradable polymers with natural polymers such as starch, glucose, oligomeric glucoses, cellulose, cellulose derivatives, lignins, citosan, gluten, collagen, zein and their copolyesters are suitable.
• Semi-aromatic polyesters are particularly suitable as biodegradable polymers for the central plastic layer.
• Partly aromatic polyesters based on aliphatic diols and aliphatic / aromatic dicarboxylic acids are also understood as meaning polyester derivatives, such as polyether esters, polyester amides or polyetheresteramides.
• Partially aromatic polyesters include linear non-chain-extended polyesters (WO 92/09654 A1).
• aliphatic / aromatic polyesters of butanediol, terephthalic acid and C 6 -C 18 aliphatic dicarboxylic acids such as adipic acid, suberic acid, azelaic acid, sebacic acid and brassylic acid (for example as in
• WO 2006/097353 to 56 described suitable mixing partners.
• Preferred are chain-extended and / or branched partially aromatic polyesters. The latter are known from documents WO 96/15173 to 15176, 21689 to 21692, 25446, 25448 or WO 98/12242, to which reference is expressly made. Mixtures of different partly aromatic polyesters are also possible.
• Partially aromatic polyesters are suitable for the central plastic film and are constructed as follows: i) 40 to 70 mol%, based on the components i to ii, of one or more dicarboxylic acid derivatives or dicarboxylic acids selected from the group consisting of succinic acid, adipic acid, Sebacic acid, azelaic acid and brassylic acid, ii) 60 to 30 mol%, based on the components i to ii, of a terephthalic acid derivative, iii) 98 to 102 mol%, based on the components i to ii, of a C 2 -C 8 -alkylenediol or C 2 -C 6 -oxyalkylenediols, iv) 0.00 to 2% by weight, based on the total weight of components i to iii, of a chain extender and / or crosslinker selected from the group consisting of a difunctional or polyfunctional isocyanate, iso
• partially aromatic polyesters of the abovementioned composition can be recycled in mixtures with polylactic acid by the process described in EP 09174077.9.
• Suitable special are partly aromatic polyester having a melt volume rate (MVR) according to EN ISO 1133 (190 ° C, 2.16 kg weight) from 5 to 50 cm 3/10 min, in particular 5 to 25 cm 3/10 min and more preferably 5 to 12 cm 3/10 min.
• MVR melt volume rate
• copolymer mixtures of the composition are also particularly suitable for the central plastic layer: (a) 5 to 95% by weight, preferably 30 to 90% by weight, particularly preferably 40 to 70% by weight, of a biodegradable, aliphatic-aromatic polyester and
• PBS polybutylene suc- cinate
• PBSA polybutylene succinate adipate
• PBSSe polybutylene succinate sebacate
• PBTA polybutylene terephthalate-co-adipate
• Compatibilizers of group (c) are carboxylic acid anhydrides, such as maleic anhydride, and in particular epoxide group-containing copolymers based on styrene, acid rylklareester and / or methacrylic acid esters.
• the epoxy groups bearing units are preferably glycidyl (meth) acrylates.
• the epoxy-containing copolymers of the above type are sold for example by BASF Resins BV under the trademark Joncryl ® ADR. Particularly suitable as compatibilizer examples play as Joncryl ® ADR 4368th
• the polylactic acid of group (b) is preferably one which has the following property profile:
• Tg glass transition point
• Preferred polylactic acids are, for example NatureWorks ® 6201 D, D 6202, D 6251, D 3051, and particularly 3251 D (polylactic acid from. Nature Works).
• the polylactic acids may also constitute the sole polymeric constituent of the plastic layer.
• Polyhydroxyalkanoates of group (b) are understood to mean primarily poly-4-hydroxybutyrates and poly-3-hydroxybutyrates, furthermore copolyesters of the abovementioned hydroxybutyrates with 3-hydroxyvalerates or 3-hydroxyhexanoate are included.
• Poly-3-hydroxybutyrate-co-4-hydroxybutyrates are known in particular from Metabolix. They are marketed under the trade name Mirel ®.
• Poly-3-hydroxybutyrate-co-3-hydroxyhexanoates are known from the company P & G or Messrs. Kaneka. Poly-3-hydroxybutyrate are sold for example by the company. PH B Industrial under the brand name Biocycle ® and by the company. Tianan under the name Enmat ®.
• the polyhydroxyalkanoates generally have a molecular weight M w of from 100,000 to 1,000,000 daltons, and preferably from 300,000 to 600,000 daltons.
• the poly Hydroxyalkanoates may also constitute the sole polymeric component of the plastic film.
• Polycaprolactone is marketed for example by the company. Daicel under the product names PLAC cel ®. It can be used alone or preferably in polymer mixtures in the plastic layer. The polycaprolactone can be used as component b) or make up the sole polymeric constituent of the plastic layer.
• polyalkylene carbonate is meant in particular polyethylene carbonate and polypropylene carbonate.
• Polyethylene carbonate is a polymer made from ethylene oxide and carbon dioxide.
• Polypropylene carbonate is a polymer made from propylene oxide and carbon dioxide.
• Polypropylene carbonate is particularly preferred and can be used alone or in combination with other biodegradable polymers in the plastic layer.
• biodegradable polymers - alone or in admixture with other polymers - can be used for the plastic layer. It has proven to be advantageous that these polymers have a high flowability.
• polylactic acid has a melt volume rate (MVR) according to EN ISO 1133 (190 ° C, 2.16 kg weight) from 5 to 70 cm 3/10 min, more preferably 9-50 cm 3/10 min and particularly preferably 5 to 25 cm 3/10 min research partner proved to be micro in such polymer blends.
• MVR melt volume rate
• mixtures of flowable polyesters with the aforementioned flowable polymer blends are suitable for paper coating.
• biodegradable, aliphatic-aromatic polyester and polymer blends are known from WO 2010034712. This document and the literature cited therein are expressly incorporated by reference for both the composition of these polyesters and the processes for their preparation.
• biodegradable in the context of the present invention is then fulfilled for a substance or a mixture of substances if this substance or the substance mixture according to DIN EN 13432 has a percentage degree of biodegradation of at least 90%.
• biodegradability results in polymers and polymer blends (hereinafter also abbreviated to polymer (blends)) decomposing in a reasonable and detectable time.
• the degradation can be enzy- matic, hydrolytic, oxidative and / or by the action of electromagnetic radiation, for example UV radiation, carried out and are usually effected for the most part by the action of microorganisms such as bacteria, yeasts, fungi and algae.
• the biodegradability can be quantified, for example, by mixing polymer (mixtures) with compost and storing them for a specific time. For example, according to DIN EN 13432, CO 2 -free air is allowed to flow through ripened compost during composting and this treated compost is subjected to a defined temperature program.
• biodegradability is calculated as the ratio of the net CO 2 release of the sample (after subtraction of CO 2 release by the compost without sample) to the maximum CO 2 release of the sample (calculated from the carbon content of the sample) as a percentage defined as biodegradation.
• Biodegradable polymers mixtures usually show signs of decomposition after just a few days of composting, such as fungal growth, cracking and hole formation.
• Corrugated board consists of one or two cover layers, the corrugations and, in the case of multi-ply corrugated board, one or more intermediate layers.
• one speaks of one-sided glued corrugated cardboard which consists of a layer of corrugated paper, which is glued to paper or cardboard.
• Single-wall, double-faced corrugated board consists of a layer of corrugated paper glued between two layers of paper and cardboard.
• Double-walled corrugated board consists of two layers of corrugated paper, which are glued together by a layer of paper or cardboard and whose free outer surface is also covered with one layer of paper or cardboard.
• higher-wavy corrugated board is constructed.
• the strengths are divided into varieties and can be found in DIN 55468. Corrugated boards with a wet-strength bond and wet-strength papers are used in particular for sea shipping. Wet strength papers are either waxed or soaked with sizing agents or wet strength resins and / or added in bulk. This wet-strength papers can not be recycled. The waxes or sizing agents hinder recycling. The recycled content, in particular of the kraftliner used for the cover and intermediate layer, is low. On the other hand, for the production of Kraftliner high and mint paper fibers are used and it would be economically very interesting if one could recover these paper fibers.
• the corrugated cardboard according to the invention preferably has kraftliners as shaft and intermediate layer or also as cover layer, which have the structure paper material / plastic Layer of biodegradable polymers or preferably paper material / plastic layer of biodegradable polymers / paper material have.
• the kraft liners used are preferably constructed as follows: i) paper material of grammage 30 to 600 g / m 2 , preferably 40 to 400 and particularly preferably 50 to 150 g / m 2 ,
• kraftliner which are constructed as follows: i) a paper material of the grammage 30 to 600 g / m 2, preferably 40 to 400 and particularly preferably 50 to 150 g / m 2 as an outer layer, ii) 1 to 100 ⁇ , preferably 5 to 80 ⁇ and particularly preferably 10 to 60 ⁇ thick biodegradable plastic layer as an intermediate layer and
• the two- or multi-layer paper composite (Kraftliner) is preferably produced by lamination and extrusion processes.
• WO 2010/034712 and the methods described therein, in particular to methods for coextrusion.
• melt adhesive is pumped from a pre-heated to about 150 to 200 ° C reservoir into the nozzle, through which the surface is applied.
• the paper web is passed at high speed directly to the die lip. The gap, the web guide, the web speed and the uniformity of the
• Dispersion coatings do not require heating before application.
• the application technology is comparable to that of melt adhesives when it comes to laminar coatings.
• the web speeds are up to 3000 m / min. at the highest.
• dispersion coatings are also possible online on paper machines.
• the plastic coating with polymers such as polypropylene carbonate can also be done with solutions of plastics, for example in alcohols.
• Single and multilayer composites of paper and plastic layers in each layer (wave or cover layer) are possible and useful in order to minimize the swelling of the cardboard layers.
• the thickness of the plastic layer of the wave path is not subject to any particular limitation.
• the basis weight of the plastic layer is z. B. 1 to 100 g / m 2 .
• the layer thicknesses of these paper layers can vary widely and z. B. to 300 g / m 2 and above.
• the paper film composite has a total thickness of 31 to 1000 g / m 2 .
• a Textilfolienverbund of 80 to 500 .mu.m and more preferably by extrusion coating a Textilfolienverbund be prepared from 50 to 300 pm.
• corrugated web thus obtained is then adhesively bonded in the usual way with one or two cover sheets to single-sided or double-sided corrugated cardboard, whereby a double or triple corrugated cardboard with two or three corrugated sheets and one or two intermediate ceiling sheets is also possible.
• the corrugated cardboard has exceptionally high stacking crush pressure, tear resistance and puncture resistance, especially after exposure to damp air, are very much increased
• the production of the shaft can be done in two stages.
• a paper web is coated, as described above, with a biodegradable and recyclable plastic by extrusion coating, hot melt application or dispersion coating.
• one or more coated paper layers in a machine between 2 wide gears (corrugating rolls) with wave-shaped teeth at about 100 to 200 ° C Favor at 160-180 ° C at high speed in the typical Wellenfbrm brought (grooved). Shaping and demand of the shaft material takes place in one step by the intermeshing gears.
• Three-layer corrugations can be produced from the already extruded or laminated kraft liners on conventional installations by means of corrugating rolls, as described, for example, in DE OS 2124092. It is advantageous to produce the multi-layered wave web by heat sealing in one operation with the corrugation on the corrugator machine (see DE 2842869). If a plastic layer lies on the surface, it may come to sticking of the plastic to the Riffel leopardung. In this case, the plastic layer is protected by Teflon coating of the gears or by a revolving, easily separable from the plastic layer film from direct temperature influence, to prevent any sticking.
• the film can be made for example in about 10-50 microns PP or PE-HD, since the homopolymers of these two polyolefins only a very low adhesion to biodegradable plastics (eg polylactic acid, PLA, PBAT, PBSeT, PBSSe, PHA, PCL. PPC).
• biodegradable plastics eg polylactic acid, PLA, PBAT, PBSeT, PBSSe, PHA, PCL. PPC.
• blends of starch and / or a biodegradable, biodegradable dispersion such as a polyester-polyurethane dispersion (e.g., Luphen® D DS 3585) may also be used.
• a hotmelt instead of the starch system as an adhesive. With such corrugated cardboard, the moisture resistance of the shaft connection can be improved.
• connection between the wave path and the cover layer can be produced by a shaft whose outer layers are coated with plastic. Then, only the thermally induced bonding or welding of the plastic surface of the wave path with the paper or plastic surface of the cover layer is possible.
• Example 1 two-layered wave
• the pilot scale coater (ER-WE-PA) consisted of a main extruder A (Reifen Harbor, 80 mm diameter - 30 D) and 3 extruders (B, C, D) with 60 mm diameter / 25 D length.
• Ecoflex F BX 701 1 a polybutylene rephthalatadipat Fa. BASF SE with a MVR of about 2.5 cm 3/10 min, all MVR values used in the following are 1133 (according to EN ISO 190 ° C , 2.16 kg weight)), a throughput of about 90 kg / h at 81 1 / min could be achieved.
• the throughput of the main extruder (Reifen Reifen, 80 mm diameter - 30 D) was 190 kg / h at a speed of 77 1 / min.
• the throughput of the extruder was varied in order to achieve the thinnest possible layer thicknesses.
• the coextrusion line had a die coextrusion tool which allowed coextrusion of up to 7 layers with a die width of 1000 mm and a control gap width of 0.5 mm. Through inserts in the melt channel different layers could be used together.
• the plant was equipped with a two-layer adapter insert (Cloeren, with edge encapsulation) of the form AAABBBB with the main extruder extruder A and a 60 er extruder B.
• the outer layer A was driven at 40% of the total thickness, the inner layer B on the board at 60% of the total thickness.
• the paper used was a waved paper based on 100% recovered paper.
• the paper was activated with a flame ionization unit (gas burner) or a corona discharge unit before the plastic melt hit. All coatings were extruded onto the board at a melt temperature of 250 ° C and a normal contact pressure on the 4 bar chill roll. The web speed was varied between 30 m / min and 200 m / min. Higher speeds led to a melting resonance on the pilot plant depending on the product.
• a flame ionization unit gas burner
• corona discharge unit corona discharge unit
• Polyester used polyester 1
• Ecoflex® F BX 701 1 (a polybutylene adipate-co-terephthalate the Fa. BASF SE) with egg nem MVR of 2.5 cm 3/10 min.
• Polyester 2
• NatureWorks® 3251 D from NatureWorks with an MVR (190 ° C, 2.16 kg according to IS01 133) of 30 ml / 10 min.
• a compound of 24% polyester 2 16% polyester 1 and 60% polylactic acid was used in main and secondary extruders A and B.
• the melt temperature was 258 ° C.
• an average layer thickness of 16.5 ⁇ m (-48% of the reference layer thickness) was achieved.
• the coating could only be removed with fiber tear in the cardboard matrix.
• Flow instabilities such as a rise and fall of the throughput or a dynamic variation of the melt web width (melting resonance) occurred only from 240 m / min on. A particularly low neck-in was observed.
• the paper film composite described under A) was corrugated on a PTI Austria Huweli 2 shaft system with intermeshing Type A shaft gears.
• the plastic layer was protected from direct influence of temperature by Teflon coating, in order to avoid any possible sticking of the film composite to the gearwheel.
• the corrugation took place at 17CTC. application properties
• the moisture resistance of the wave was determined by means of the flat immersion resistance (CMC) according to DIN EN ISO 7263 under a normal climate according to DIN EN 20187.
• the samples had the dimensions 160 x 12.7 mm and were not air-conditioned and air-conditioned, ie stored for 48 hours at 30 ° C and 90% humidity, measured.

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• Organic Chemistry (AREA)
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• 2011
  • 2011-08-22 KR KR1020137007251A patent/KR20140000212A/ko not_active Application Discontinuation
  • 2011-08-22 CN CN2011800409855A patent/CN103080419A/zh active Pending
  • 2011-08-22 EP EP11745986.7A patent/EP2609252A1/de not_active Withdrawn
  • 2011-08-22 WO PCT/EP2011/064342 patent/WO2012025470A1/de active Application Filing

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