The use of recycled fibers derived from old corrugated cardboard (OCC) potential for enhanced strength properties through the addition of carboxy methylcellulose (CMC). Research carried out on local OCC with variation of time reaction, temperture, and the dosage of of CMC and CaCl2. Handsheet laboratory was made, and then analyzed the strength properties include tensile index, tensile energy absorption (TEA) index , bursting index and folding endurance, as well as coarseness and kink. The results show the optimum condition is achieved on the conditions of the reaction time of 20 minutes, the reaction suhue 25°C, the concentration of CMC 0,75% and concentration CaCl2 0,5% . Strength properties improvement was achieved at 3,07% tensile index, folding endurance 43,75% and bursting strength 36,81% .Keywords: CMC, OCC, strength properties ABSTRAKSifat kekuatan serat daur ulang yang berasal dari kotak karton gelombang (KKG) bekas berpotensi untuk ditingkatkan melalui penambahan karboksi metil selulosa (CMC). Penelitian dilakukan terhadap KKG bekas lokal dengan variasi waktu, suhu, dan dosis penambahan CMC dan CaCl2. Lembaran kertas dibuat secara laboratorium , kemudian dianalisis sifat kekuatan meliputi indek tarik, indek tensile energy absorption (TEA), indek retak, dan ketahanan lipat, serta analisis coarseness dan kink. Hasil penelitian menunjukan kondisi optimum dicapai pada waktu reaksi 20 menit, suhu reaksi 25°C, konsentrasi CMC 0,75% dan konsentrasi CaCl2 0,5%. Peningkatan kekuatan yang dihasilkan adalah indeks tarik 3,07%, ketahanan lipat 43,75% dan indeks retak 36,81%.Kata kunci: CMC, KKG bekas, sifat kekuatan
The strength properties of paper are strongly affected by fiber quality. The objective of this study was to assess the effect of modification fiber by carboxymethylation of leaf bleached kraft pulp (LBKP) and deinked pulp (DIP) by using carboxymethyl cellulose (CMC). Carboxymethylation was carried out by addition of various concentration of CMC and cationic agent of CaCl2. Handsheets with 70 gsm were made from the stock, and the physical properties were tested as the tensile index, stretch, tensile energy absorption (TEA), tearing index, and bursting index as well as SEM analysis. The results showed that the highest increase of fiber strength of LBKP and DIP was achieved by addition of 1% CMC and 9.19% CaCl2. For LBKP, the increasing of tensile index was 18.1%, stretch 27%, TEA 30.2%, tear index 7,8 % and burst index 16,7%. Whereas for DIP, the increasing of tensile index reached 29.9%, stretch 22.2%, TEA 61.2%, tear index 20.7% and burst index 63.1%. From the results of SEM analysis showed that the addition of CMC and CaCl2 increased fiber bonding.Keywords: CMC, LBKP, DIP ABSTRAK Sifat kekuatan kertas sangat dipengaruhi oleh kualitas serat. Tujuan penelitian ini adalah untuk mengetahui pengaruh modifikasi serat kraft putih kayu daun (LBKP) dan serat hasil deinking (DIP) dengan karboksimetilasi menggunakan karboksimetil selulosa (CMC). Modifikasi secara karboksimetilasi dilakukan dengan variasi penambahan CMC dan sebagai cationic agent CaCl2. Lembaran dibuat dari stok dengan gramatur 70 gsm, kemudian dilakukan pengujian fisik dengan parameter indeks tarik, regang, TEA, indeks sobek dan indeks retak. Selain itu lembaran juga diuji morfologi dan SEM. Hasil penelitian menunjukan peningkatan kekuatan lembaran tertinggi dicapai oleh LBKP maupun DIP, pada kondisi penambahan 1% CMC and 9.19% CaCl2. Untuk LBKP peningkatan indeks tarik adalah 18,1%, regang 27%, TEA 30,2%, indeks sobek 7,8 % dan indeks retak 16,7%. Sedangkan untuk DIP, peningkatan indeks tarik mencapai 29,9%, regang 22,2%, TEA 61,2%, indeks sobek 20,7% dan indeks retak 63,1%. Hasil analisa SEM menunjukan bahwa dengan penambahan CMC dan CaCl2, mengakibatkan terjadi peningkatan ikatan antar serat.Kata kunci: CMC, LBKP, DIP
This research has been conducted to maximize the calcium carbonate usage without optical brigthening agent additional. The improvement on printing properties and a high degree of white paper was addressed the problem of meta-stable materials coated on the submicron of crystalline vaterite precipitated calcium carbonate (PCC) by composite it with latex. This study characterized the coating pigment, preparation of coating color, applied to paper sheets and compared with previous research and Indonesia National Standard specification of coated printing paper (SNI 0154:2010). The use of mixed submicron PCC (SPCC) and regular PCC (RPCC) as a white-coated paper produces a high brightness, low roughness, low oil penetration, high picking strength, high gloss, and low water absorption. Mostly those testing parameters meet the requirement of the Indonesia Standard National of printing coated-paper SNI 0154: 2010. Improvement also achieved on composite of submicron PCC-binder latex. A significant improvement of gloss value of the laboratory-scale processes was equal with supercalender using the paper machine and 23.6-28.9% of increasing of brigthness prior to previous study. ABSTRAKPenelitian ini bermaksud untuk memaksimalkan penggunaan pigmen kalsium karbonat tanpa menggunakan tambahan optical brigthening agent. Sifat cetak dan derajat cerah kertas ditingkatkan dengan cara mengatasi masalah meta-stabil pada bahan salut presipitat kalsium karbonat (PCC) submikron bentuk kristal vaterit melalui pembentukan komposit dengan lateks. Penelitian ini meliputi tahap karakterisasi bahan salut, pembuatan bahan salut, dan aplikasinya pada kertas, serta analisis sifat fisik, cetak dan optis pada kertas cetak salut, lalu membandingkannya dengan penelitian sebelumnya dan SNI spesifikasi kertas cetak salut SNI 0154:2010. Penggunaan campuran PCC submikron (SPCC)dengan PCC reguler (PCC) sebagai bahan salut menghasilkan derajat cerah kertas tinggi, kekasaran rendah, penetrasi minyak rendah, ketahanan cabut tinggi, kilap tinggi, dan daya serap air rendah. Sebagian besar parameter tersebut memenuhi standar SNI spesifikasi kertas cetak salut (SNI 0154 : 2010). Peningkatan juga terjadi pada komposit PCC submikron (SPCC) dengan binder lateks. Peningkatan signifikan terjadi pada analisa kilap kertas cetak salut skala laboratorium yang menunjukkan hasil sama dengan superkalender pada mesin kertas, dan terjadi peningkatan derajat cerah yaitu sekitar 23,6 – 28,9% terhadap penelitian sebelumnya.Kata kunci: bahan salut, kertas cetak salut, kilap tinggi, SNI 0154:2010
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.