perekat plastisol pvc
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Transcript of perekat plastisol pvc
Perekat plastisol PVC1. Plastisol2. Solvent Cement Organosol3. Solvent Cement Rigid
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1. Plastisol
Plastisol adalah suatu disperse dari resin termoplastis yang sangat lembut dalam cairan, biasanya polyvinyl chloride dalam plasticizer. Hasil pastanya merupakan cairan yang sangat kental, apabiladipanasi akan menjadi homogen sehinggamenghasilkan fase padat yang tunggal
Kelebihan plastisol
Aplikasinya mudahKekuatan ikatan moderat – tinggi dapat untuk berbagai substratFleksibilitasnya awet maka dapat mengakomodasi gerakan relatif substratdan bereaksi sebagai peredamFormulasinya luas, menjadi busa yang lembut sampai padat keras rapat.
Kekurangan Plastisol
temperatur curing yang tinggi sehinggamenyebabkan keterbatasan aplikasinyapada substrat yang sensitif terhadappanasAda kemungkinan terjadi korosidisebabkan karena pembebasan dari HCL
Type of Polymerization Process
Suspension
Emulsion
Suspension
Characteristics Involves the free radical catalyzed polymerization of discrete droplets of vinyl chloride monomer suspended in water by agitation. Protective colloids are gelatin, methyl cellulose, polyvinyl chloride, etc.
Process The suspending agent is dissolved in deionizedand deaerated water and added to a glass-lined or stainless reactor. The remainder of the water, catalyst, and other additives are then added. Liquefied monomer is pumped in, and the closed system is then heated to about 50°C and raised to 125 psi. Typical conversion rates are 92-93% and particle sizes are about 100 microns.
Emulsi
Characteristics Involves the use of surface active agents (emulsifiers) and water soluble catalysts. Although agitation is necessary, the emulsion is stabilized by the surface active agents.
Process The process is similar to the suspension polymerization process. At the conclusion of the reaction, unreacted monomer is recovered by vacuum and recycled. The stabilizer like sodium carbonate is then added to the latex, and the latex is spray dried. Particles from the emulsionprocess are about 1 micron.
Perekat dan sealant PVC plastisol
PVC resins ( Asahi type C 150 s )Plasticizers ( e.g.DOP, DBP dll )Inert filler (e.g., calcium carbonate)Heat stabilizers ( e.g.epon 28, lead, cadmium, sabun alkalin, basic lead compound, organo tin compound )Acid scavengers ( e.g. Calcium carbonate )Adhesion promoters ( e.g. MgO, CaO )
Formulasi Plastisol dan sealant
Component Parts by WeightPVC polymer(s) 25Plasticizer(s) 36Precipitated calcium carbonate 20Ground calcium chloride 12
Other additives including:Adhesion promoters Hydrocarbon oils Heat stabilizer 7Acid scavenger
Aplikasi
Sealing panel Sealing deck otomotifAsembling ( filter oli, alkohol dll)
2. Solvent Cement Organosol
Seperti juga plastisol hanya ada penambahan solvent sebagai thinnerSebagai jawaban masalah fluiditas plastisol yang sangatkental.Keunggulan sistem non volatile menjadi hilang
Formulasi solvent cement organosolKomposisi BeratPvc resin 50Cyclo Hexanone 250MEK 100DOP 10MIBK 12.5
Aplikasi
Perekat untuk bahan bersifat fleksibel misSol sepatu pvc, Panel dll
3. Solvent Cement
Merupakan bahan yang digunakan untuk menggabungkan plastik substrat dengan formulasisolvent.Mengandung bahan kimia yang dapat melarutkan PVC atau bahan plastik yang lainApabila pelarut menguap, meninggalkan PVC resin yang akan menggabungkan dua permukaan PVC
Formulasi
Component Parts by Weight
PVC resin 25CycloHexanone 100 – 150MEK 75
Aplikasi
Perekat untuk barang dari bahan PVC mispipa, lembaran, talang dll
Reference
1. www.specialchem4adhesive.com2. www.duraposita.com3. www.freepatentsonline.com4. Adhesive technology, marcia gutcho, noyes data corp 19835. PVC Plastik, W V Titow, Elseiver Aplied Scince6. Handbook of adhesives, SBP Board Consultant n engineer, 7. Adhesive and sealant, David lammas,argus books 19918. Yellow Pages