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All Journal Jurnal Riset Industri Majalah Kulit, Karet, dan Plastik
Dwi Wahini Nurhajati, Dwi Wahini
Center for Leather, Rubber, and Plastic, Jl. Sokonandi No. 9 Yogyakarta
Engineering Industrial & Manufacturing Engineering

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Pengaruh resin resol pada pembuatan film akrilat dengan menggunakan sinar ultraviolet Nurhajati, Dwi Wahini
Majalah Kulit, Karet, dan Plastik Vol 4, No 8 (1989): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (874.881 KB) | DOI: 10.20543/mkkp.v4i8.456

Abstract

The aim of this research to investigate photoinitioting ability of resole resin in photocrosslinking of acrylate monomers. In this article, compounds consist of acrylate monomers. In this article, compounds consist of acrylate monomers (ECA and DPCA 60) and resole resin were irradiated with ultraviolet light (120 watt/cm) for 3 times and then analised. Compounds with high resole resin and DPCA – 60 content formed insoluble transparent thin film. It was found that resole resin played an important role in the formation of polymer crosslinked structures in acrylate monomers. However, the value of the insoluble thin film fraction did not greater than 40,16% at present. The highest film fraction was obtained from a compound with resole resin 40 wt. % and DPCA 60 = 60 wt. % content. 
Studi pelapisan logam pada produk-produk plastik Nurhajati, Dwi Wahini
Majalah Kulit, Karet, dan Plastik Vol 8, No 15 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (701.29 KB) | DOI: 10.20543/mkkp.v8i15.491

Abstract

The most popular technique for the metalic finishing of plastic are electroplating and vacuum metallizing. Electroplating for plastics is a surface coating process with metal in the electrolyte cell, where the role of plastic is as a catode, and metal as an anode. Vacuum metallizing for plastics is a process in which plastics surfaces are thinly coated with metal by exposing them to the vapor of metal that has been evaporated under vacumm. INTISARI  Teknik untuk melapis plastik dengan logam yang banyak digunakan adalah lapis listrik (“electroplating”) dan secara vacum (“vacuum metallizing”). Teknik lapis listrik adalah proses pelapisan permukaan plastik dengan logam didalam sel elektrolit, dimana plastik yang akan dilapisi bertindak sebagai katoda dan logam yang dilapiskan berperan sebagai anoda. Sedangkan teknik pelapisan plastik dengan logam secara vacum adalah proses pelapisan permukaan yang berlangsung didalam sebuah “vacuum chamber”, dimana logam diubah menjadi uap logam karena panas dalam kondisi vakum. 
Photokopolimerisasi monomer akrilat degan kulit kras sapi Nurhajati, Dwi Wahini; Suraswati, Agustin; Kadarijah, Kadarijah; Sumarti, Made
Majalah Kulit, Karet, dan Plastik Vol 12, No 23 (1997): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (635.015 KB) | DOI: 10.20543/mkkp.v12i23.353

Abstract

The research on photocopolymerization of acrylate monomer with cow crust hide had object to observe the resulted copolymer onto cow crust hide. Crust hides, saturated with aqueous emulsions containing 25 wt % of n-butyl acrylate (n-BA) or tripropylene glycol diacrylate (TPGDA) were irradiated by cobalt – 60 gamma rays with doses ranges from 5 to 25 kGy. The irradiated hides were washed with water, dried in air and extracted in soxhlet apparatus for 48 hours to remove homopolymer. The highest yield of photocopolymerization of n – butyl acrylate monomer with crust hides was found 17,7878% at dose 25 kGy, and for photocopolymerization of tripropylene glycol diacrylate with crust hides was found 39,4245% at dose 20 kGy. INTISARI Penelitian photokopolymerisasi monomer akrilat dengan kulit kras sapi bertujuan untuk mengetahui banyaknya kopolimer yang dihasilkan didalam kulit kras sapi. Kulit kras yang sudah dijenuhkan dengan emulsi n – butyl akrilat atau tripropilena glikol diakrilat dalam air dengan konsentrasi monomer 25% berat, diiradiasi dengan sinar gamma kobalt – 60 dengan dosis yang bervariasi dari 5 sampai 25 kGy. Kulit yang sudah diradiasi dicuci dengan air, dikeringkan di udara dan diekstraksi dalam peralatan soxhlet selama 48 jam untuk menghilangkan homopolimer. Hasil tertinggi dari photokopolimerisasi monomer n – butyl akrilat dengan kulit dicapai pada dosis 25 kGy yaitu sebesar 17,7878%, dan untuk photokopolimerisasi monomer tripropilena glikol diakrilat dengan kulit dicapai pada dosis 20 kGy sebesar 39,4245%.
Penelitian penggunaan resin epoksi untuk membuat landasan potong pon Nurhajati, Dwi Wahini; Pramono, Pramono; Supriyanto B, Supriyanto B; Supriyadi, Supriyadi
Majalah Kulit, Karet, dan Plastik Vol 12, No 24 (1997): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.856 KB) | DOI: 10.20543/mkkp.v12i24.307

Abstract

Application of epoxy resin to make specimen punching pad was studied. The specimen punching pad compound was made from epoxy resin, CaCO3 as filler, colour paste, and hardener. The compound was moulded in to specimen punching and moulding by casting moulding during 24 hours. Physical test result of the compound saw that compound which it consist of epoxy resin : 100 parts, CaCO3 : 20 parts, hardener : 100 parts, colour paste : 1 required, has physical property like the physical property of the imported specimen punching pad. Presence of CaCO3 as filler caused the specimen punching pad surface which it punched by cutter became brittle.   INTISARI Telah dilakukan penelitian tentang penggunaam resin epoksi untuk membuat landasan potong pon. Kompon landasan potong pon dibuat dari resin epoksi, CaCO3 sebagai filler , pewarna dan hardener. Kompon dicetak dalam landasan potong pon menggunakan sistim tuang dengan waktu pencetakan selama 24 jam. Hasil uji sifat fisis menunjukan bahwa kompon berisi resin epoksi : 100 bagian, pewarna : sesuai kebutuhan, mempunyai sifat fisis yang menyerupai sifat fisis landasan potong pon impor. Adanya CaCO3 sebagai filler menyebabkan permukaan landasan potong yang terkena pisau potong menjadi rapuh.
Kemungkinan penggunaan teknologi pelapisan permukaan dengan ultraviolet dan berkas elektronik indonesia Nurhajati, Dwi Wahini
Majalah Kulit, Karet, dan Plastik Vol 7, No 12-13 (1992): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (874.031 KB) | DOI: 10.20543/mkkp.v7i12-13.472

Abstract

Ultraviolet (UV) or electron  beam (EB) curing coating technology is the crosslingking polymerization of a coating materials on a substrate ( such as paper, metal, wood or  plastic) via interaction with incident UV/EB irradiation, and this technology has been commercial used in a number of countries. The coating materials are monomer, oligomer or a mixture of monomer and oligomer. The crosslink polymer coated surface has been know to be resistant to water, organic solvent and heat. This paper gives an overview of the coating technology by ultraviolet or electron beam irradiation, and their applicability in Indonesia.  INTISARI Teknologi pelapisan permukaan dengan ultraviolet (UV) atau berkas elektron (EB) merupakan proses polimerisasi ikat silang dari bahan pelapis secara langsung di atas substrat (misal kertas, kayu, logam maupun plastik) melalui insiden iradiasi sinar ultraviolet ataupun berkas eletron, dan teknologi ini sudah banyak digunakan dalam monomer, oligomer atau campuran keduanya. Permukaan yang telah dilapisi dengan polimer ikat saling dikenal tahan terhadap air, pelarut organik dan juga panas. Makalah ini akan memberikan gambaran tentang kemungkinan pengunaan teknologi pelapisan permukaan dengan iradiasi ultraviolet ataupun elektron di Indonesia.
Co-Authors Agustin Suraswati, Agustin Arum Yuniari, Arum Ary Achyar Alfa, Ary Achyar Bambang Priyono Emiliana Kasmudjiastuti, Emiliana Endro Kismolo, Endro Hadi Musthofa, Hadi Herminiwati Herminiwati, Herminiwati Ihda Novia Indrajati, Ihda Novia Ike Setyorini, Ike Kadarijah Kadarijah, Kadarijah Made Sumarti, Made Niken Karsiati, Niken Nursamsi Sarengat, Nursamsi Penny Setyowati, Penny Pramono Pramono Prayitno Prayitno Sri Brataningsih Puji Lestari, Sri Brataningsih Puji Sugihartono Sugihartono Suliestiyah Wiryodiningrat Supraptiningsih Supraptiningsih, Supraptiningsih Supriyadi Supriyadi Supriyanto Supriyanto