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All Journal Majalah Kulit, Karet, dan Plastik
Penny Setyowati, Penny
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Engineering

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Plastik nonwoven sebagai pengemas bahan makanan yang bersifat breathable Setyowati, Penny
Majalah Kulit, Karet, dan Plastik Vol 19, No 1 (2003): Majalah 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 (1058.718 KB) | DOI: 10.20543/mkkp.v19i1.250

Abstract

Nonwoven plastic is a new material for packaging  that has some special quality among the other things such as flexible, higher strength, hydrophob, breathable and hygienes. The technology of nonwoven plastic is spunbond technolog which is a clean technology and produce a non fibre product. The raw material of nonwoven plastic is food grade polypropylene, so that the products are safe for food packaging. Recently just pioneered of nonwoven plastic application as innerliner of plastic sack that can replace “karung goni”as rice packaging and replace cotton sack as meal or flour packaging. Therefore  grains that have not been prepared yet, respiration activity is very important to be breathable characteristic of nonwoven plastic is able to support air circulation very well and also to keep humidity balance in the packaging. At the flour packaging, beside hydrophob characteristic, however breathable characteristic is necessary too because flour  has a tendency to absorb water and flour stability must be kept at 13.5 – 14% moisture content. The first experiment was taken by PT. Boma Internusa concerning with rice storage that use nonwoven plastic packaging as innerliner of plastic sack during 2 months, and analysis showed that the rice did not smell, louse unfolding was decrease 9fumigation cost was low), yellow grains and broken grains were decrease and did not occur any change of color. In the experiment of flour storage during 3 months gave an analysis that flour wsa still having good condition and fulfilled the standard trade. Keywords: Nonwoven, food packaging, plastic. 
Pengaruh pengaktifan kembali lem sintetis terhadap kekuatan rekat (peel strenght) pada proses pengesolan sepatu plastik, sol karet, sistem pres dingin Setyowati, Penny
Majalah Kulit, Karet, dan Plastik Vol 6, No 10-11 (1991): 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 (1249.709 KB) | DOI: 10.20543/mkkp.v6i10-11.466

Abstract

This research is an ecxperiment on the influence of reactivated temperature and time of synthetic adhesive upon peel streght on plastic shoes adhesion processes, made at synthetic leather uppers, rubber soles and used GB and PC adhesives. The upper side of shoes and sole are brushed with PC adhesive as a supporting adhesive and then continued with GB adhesive, to be aged for at least 24 hours until they become dried. Then they are reactivated at the temperature varied between 60ο C - 90 ο C with temperature interval of 10 ο C, and time varied between 10 -25 minutes with time interval of 5 minutes. They are stuck and pressed at 2.5 kg/cm2 for 2 minutes. The peel test results is calculated by statiscal method. So that the experiment result proved that the influence of heat on synthetic adhesive reactivated is to increase adhesion. Optimal peel test value was reached at the reactiveated temperature of 80 ο C and time of 15 minutes. INTISARIPenelitian ini merupakan penelitian mengeni pengaruh suhu dan waktu pengaktifan kemabali lem sintesis terhadap kekuatan rekat (peel strenght) pada proses pengesolan/pengeleman sepatu plastic, atasan kulit imitasi, sol karet, lem yang diguakan lem sintesis GB dan PC. Sepatu bagian atas dan sol doolesi lem PC (sebagai lem pembantu) kemudiajn GB, dibiarkan minimal 24 jam seampai lem menjadi kering, kemudian diaktifkan pada suhu berfariasi 60ο C - 90 ο C dengan interval 10ο C dan waktu 10-25 menit tekanan 2,5kg/cm2. Uji kuat rekat antara soal luar dengan sol dalam (peel test) dilakukan dengan alat tensile steght. Hasilnya dievaluasi secara statistic dan disimpulkan bahawa : Pegaruh pemanasan pada pengatifan kembali lem sintesis adalah meningkatkan nilai kuat rekatanya. Suhu dan waktu pengaktifan yang memberikan nilai kuat rekat tertinggi adalah suhu 80ο C waktu 15 menit. 
Penelitian pemanfaatan lateks alam iradiasi pada pembuatan sepatu kanvas Murwati, Murwati; Setyowati, Penny; Nadilah, Sri
Majalah Kulit, Karet, dan Plastik Vol 11, No 21 (1996): 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 (819.914 KB) | DOI: 10.20543/mkkp.v11i21.387

Abstract

The aim of the research is to applicate irradiation natural latex as cement material for sole and foxing of convas shoes. The process of shoe manufacturing is carried out using steam vulcanization system. Shoe production is tested their cemented strenght consisting of cemented strength testing of sole to canvas, and foxing testing to canvas. The result of cemented strength of canvas shoes Li compared with sulphuric vulcanization latex LA based on SNI -12-0172-1987, Canvas shoes for general purposes, proved that cemented strength of sole to canvas shoes Li = 10.660 N/6 mm is lower compared with canvas shoes LA. Cemented strenght of foxing to canvas shoes Li = 11.892 N/6 mm is higher compared with canvas LA. Cemented strength result to all testings of canvas shoes Li fulfills specification of SNI-12-0172-1987, Canvas shoes for general purposes, in addition irradiation natural latex can be used as cemented material in shoes manufacturing. INTISARI Penelitian ini bertujuan untuk menerapkan lateks alam iradiasi sebagai bahan perekat untuk pemasangan sol dan foxing pada sepatu kanvas.Proses pembuatan sepatu dilakukan dengan sistim vulkanisasi uap, hasil sepatu diuji kekuatan rekatnya meliputi uji kuat rekat sol luar dengan kanvas dan uji kuat rekat foxing dengan kanvas. Nilai uji kuat rekat sepatu kanvas (Li) dibandingkan dengan nilai uji kuat rekat sepatu kanvas yang menggunakan perekat (lem) lateks alam vulkanisasi belerang (LA) dengan tolok ukur SNI-12-0172-1987, Sepatu kanvas sol luar dengan kanvas sepatu kanvas Li = 10,660 N/6 mm adalah lebih rendah dibandingkan dengan nilai kuat rekat sol luar dengan kanvas sepatu kanvas LA. Sedangkan nilai kuat rekat foxing kanvas Li = 11,892 N/6 mm adalah lebih tinggi dibandingkan dengan kuat rekat foxing dengan sepatu kanvas LA. Nilai kuat rekat untuk semua jenis uji sepatu kanvas Li memenuhi persyaratan SNI-12-0172-1987, Sepatu kanvas untuk umum, dengan demikian lateks alam iradiasi dapat digunakan sebagai bahan perekat (lem) pada pembuatan sepatu kanvas.
Uji coba pembuatan sol karet cetak sesuai SII 0944 – 84 sistem cetak “hand press” Setyowati, Penny
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 (1154.917 KB) | DOI: 10.20543/mkkp.v7i12-13.477

Abstract

The trial on making of rubber sole fulfilling the SII 0944 – 84 with hand press molding system was using rubber compound on the formula of : RSS I 100 parts; Reclain rubber 30; ZnO 3; Carbon black 60; Paraffinic oil 6; Stearic acid 2; PBN 1; MBT 0,5; MBTS 0.5; TMT 1 and Sulfur 2. The vulcanization condition with time interval 0.5 minutes. Physical testing of rubber sole trial  result, statistical evaluation with CRD method for determining vulcanization time for resulting optimal physical testing. Optimal physical test value was reached on the time of vulcanization 6 to 7 minutes and temperature of vulcanization between 150-1600 C.
Co-Authors Any Setyaningsih, Any Budiwiyono Budiwiyono, Budiwiyono Dwi Wahini Nurhajati, Dwi Wahini Kadarijah Kadarijah, Kadarijah Murwati Murwati Nurwati Nurwati Pramono Pramono Sri Nadilah, Sri Suliestiyah Wiryodiningrat Supriyanto Supriyanto Sutarti Rahayu, Sutarti