Vinnex® Resins for Paper Coating

CREATING TOMORROW’S SOLUTIONS

BIOPOLYMERS I VINNEX® RESINS

VINNEX® RESINS FOR PAPER COATING

Improved Processing and Performance of Biopolyesters in Paper Coating

Extrusion coating is a versatile coating Improved Processing Performance Adding VINNEX® 2525 increases the melt technique used for the economic appli- through Reduced Necking strength resulting in significantly reduced cation of various plastics onto substrates, Conventional PLA has a relatively low melt necking during extrusion coating. In cases such as paper. Conventional paper strength which can cause problems during where both improved necking and heat- coating utilizes low-density polyethylene extrusion paper coating. Necking causes sealing properties are desired, VINNEX® (LDPE), but LDPE has several draw- uneven distribution of the film on the sub- 2523 is the right choice. backs: use of non-renewable resources, strate material. lack of biodegradability and difficulties in recycling. In contrast, biopolyesters Standard Extrusion Coating Process Improved Melt Strength such as polylactic acid (PLA) are biobased, maintain biodegradability and do not interfere with the paper Extruder recycling process.

With VINNEX®, WACKER offers polyvinyl acetate (PVAc) based resins that can Extrusion Biopolyester coated considerably improve the mechanical film substrate properties and the processing perfor- Paper mance of biopolyesters in the extrusion substrate coating of paper, making them better Pressure roll substitutes for conventional LDPE. Chill roll

PLA +20% VINNEX® 2525

Product Recommendations and Properties Product Necking Heat Tack Composition Form Tg Density Bulk MFR Use level Food sealing density melt index contact1 [°C] [kg/m3] [kg/m3] [cm3/ 10 min] [%] VINNEX® 2522 – PVAc Beads 42 1,180 550 – 800 21.92 5 – 10 Yes VINNEX® 2523 PVAc Micro- 43 1,180 700 – 850 7.03 10 – 20 Yes Pellets VINNEX® 2525 – – PVAc Micro- 44 1,180 700 – 850 15.44 10 – 20 Yes Pellets

Strong positive effects 1 Suitable for food contact according to the EU regulations Note: These figures are inteded as a guide and should not Positive effects for Food Contact and FDA (US Food and Drug Administration, be used in preparing specifications. – No effect §175.105, §175.300, §176.170 and §176.180) 2 MFR melt index measured at 130 °C / 2.16 kg / 2 mm 3 MFR melt index measured at 150 °C / 2.16 kg / 2 mm 4 MFR melt index measured at 150 °C / 21.6 kg / 2 mm

VINNEX® is a registered trademark of Wacker Chemie AG. VINNEX throughput in standard equipment. possible orelsesignificantly reducing not tures andlongersealingtimesare often tional LDPE.However, highertempera- must bemuchhigherthanthatforconven temperature bond strength, thesealing such aspapercups.For acceptable seal cations where sealbondstrength iscrucial, This cancausesevere problems inappli- and leadsto aweaksealbond strength. Sealing ofconventionalPLAfilmsisdifficult Improved HeatSealability The sealbondstrength ofPLAandPLA/VINNEX [email protected], www.wacker.com, www.wacker.com/socialmedia 6279-1741, 89 81737 +49 AG, Phone: Germany, Chemie Wacker Munich, 6279-1770 89 +49 Fax: sealing at120°C. resin filmsto paperwasdetermined after heat coating. throughput anddifficultiesduring extrusion to substrate Thisleadsto surfaces. lower and consequentlydoesnotadhere well Conventional PLAhasrelatively lowtack Paper Substrates Improved Tack forBetter Adhesionto concern, werecommend VINNEX sealing properties. Ifneckingisalsoa Recommendations for use do not constitute a warranty, either express or implied, of the fitness or suitability of the product for a particular purpose. particular a for product the of suitability or fitness the of position. the implied, or clarifying express either necessary, if a warranty, and, rights constitute not do use parties’ for third of infringement Recommendations of information The possibility the used. being also investigating are of materials obligation raw the from user companies’ the other absolve where not does us by especially provided control, no have we by which over checked be should processing medium during this in made conditions of because recommendations The trials developments. preliminary new or receipt. on progress technical immediately of scope the supplies all within checking constants carefully product from alter to user the right the absolve not do We reserve but knowledge our of state present the with accordance in are medium this in presented data The Paper Substrates Improved Heat-Sealingto N / 15 mm 1.0 2.0 3.0 4.0 5.0 0 ® 2522isidealforimproving heat- VINNEX 0% ® 2523 +10% +20%

VINNEX ® ® 2522 2523. 2523. Fiber tear ®

our technical service. more detailedinformation,pleasecontact has to bedetermined casebycase.For largely dependsontheformulationand bioplasticcompound,biodegradationevery test (ISO14855orEN 13432).Aswith already passedtheindustrialcomposting WACKER’s polyvinylacetate resins have Various blendsofbiopolyesters with be Maintained Biodegradability ofBiopolyesters Can may alsobeusedto improve thetack. Adding VINNEX when sealedmaterials are(fibertear). pulledapart substrate at120 °C.Strong adhesionisobserved mend usingVINNEX Where tackisthemajorconcern,werecom- enabling asmooth,fastproduction process. increase thetackofcoating,thereby PLA/VINNEX Paper Substrates Improved Tack forBetter Adhesionto ® resin filmwasweldedto apaper ® resins cansignificantly ® 2522.VINNEX ® 2523

CREATING TOMORROW’S SOLUTIONS

VINNEX Contact Applications All Grades Can beUsedinFood VINNEX §176.170 and§176.180). Drug administration (§175.105,§175.300, for Food ContactandtheUSFood and applications according to EUregulations At aGlance:AdvantagesofVINNEX for Paper Coating • • • • • • • VINNEX PLA andPLA/PBAT blends applications withbiopolyesters, suchas processing aidsforextrusion papercoating applications (EUandFDA) All three grades canbeusedinfoodcontact maintained Biodegradability ofbiopolyesters canbe improved atthesametime ing, heatsealabilityandtackneedto be VINNEX sealability onstandard LDPEequipment VINNEX extrusion coating strength andreducing necking during VINNEX VINNEX paper substrate tack andleadsto better adhesionto the ® ® 2525canbeusedinfoodcontact 2522,VINNEX ® ® ® ® ® 2522isequallyadeptatimproving resins are idealmodifiersand 2523istheidealchoiceifneck- 2522isidealforimproving heat 2525isidealforimproving melt ® 2523and ® Resins Resins

7130e/10.19 replaces 7130e/11.14