PVC SOLVENT CEMENTS (UPVC & CPVC)
[EIRI/EDPR/1901] J.C. 776
INTRODUCTION
The operation of solvent cement may be broadly defined as the formation of a Joint where in a self bond between two polymeric components is promoted by the presence of a solvent in temporarily high concentration. The onion between two parts of a Joint is brought with the aid of solvents, solvent cement or adhesives.
The type of joint best suited to solvent bonding is a lap joint. The nutuod in not normally used for but. Joint where these are likely to experience significant stresses. The essential features of bond formation in this method are the intes diffusion of polymer molecules across the original interface between the two components of the joint and the promotion and acceleration of this process by the swelling of the polymer of the joint components at the clubface, caused by sorption of the solvent. The solvent concentration in the polymer, originally high, is ultimately reduced to a lord constant value mainly the further penetration inwards and also by evaporation from the edges of the bond zone.
PVC or poly vinyl chloride is insoluble in common cow cost solvents, but is soluble in cyclohexane, tetra hydrofuram nitrohenzene and a value of others. In solvent of this type it can be used for bonding rigid PVC pipe work since the solvents soften the santenial of the pipes and as form of solvent weld in produced. It is sometimes tenght that by virtue of its polymer content, a solvent cement is gap-filling. This is not the case with solvent cements for PVC card indeed not with most such cements formulated for other plastics. Mainly because the amount of polymer they contain is proportionately low. It is therefore essential for good results that the surfaces of parts to be joined should fit closely tog ether with no gaps.
The polymeric components of PVC solutions used as solvent cements for bonding pipes, pipe fittings and certain other PVC products may be homo polymers, co polymers, standard PVC compounds or the actual compositions of the moldings etc. to be bonded. By defination, the two essential components of a PVC solution must be PVC polymer (S) and solvent. The solvation so obtained is used for some practical application (e.g. some solvent cement, film casting salvations) are just such simple systems.
COST ESTIMATION
Plant Capacity 2 MT/Day
Land & Building (800 sq.mt.) Rs. 1.06 Cr
Plant & Machinery Rs. 45.00 Lac
Working Capital for 1 Month Rs. 72.35 Lac
Total Capital Investment Rs. 2.31 Cr
Rate of Return 33%
Break Even Point 50%
CONTENTS
INTRODUCTION
HOW TO SOLVENT WELD PVC PIPE AND FITTINGS
MECHANISM OF THE SOLVENT CEMENT OPERATION
PROPERTIES AND CHARACTERISTICS OF PVC SOLVENT CEMENT
USES & APPLICATION
MARKET SURVEY
OVERVIEW OF PVC PIPES AND FITTING
PRESENT MANUFACTURERS/SUPPLIERS OF PVC SOLVENT CEMENT
SPECIFICATION OF CPVC RESIN
REQUIREMENT OF PVC SOLVENT CEMENT
TECHNICAL SPECIFICATION OF LOW VOC PVC SOLVENT CEMENT
AVOID USE AROUND DRY GRANULATED CALCIUM HYPOCHLORITE
FORMULATIONS OF PVC SOLVENT
MANUFACTURING PROCESS OF PVC SOLVENT CEMENT
PROCESS FLOW DIAGRAM
DETAILS OF UNIVERSAL SOLVENT CEMENT
UNIVERSAL SOLVENT CEMENT
TESTING, MARKING AND HANDLING OF PVC SOLVENT CEMENT
GUIDE OF PVC SOLVENT CEMENT SELECTION
WORKING METHOD WITH SOLVENT CEMENT
PLANT LAYOUT
PRINCIPLES OF PLANT LAYOUT
PLANT LOCATION FACTORS
EXPLANATION OF TERMS USED IN THE PROJECT REPORT
SUPPLIERS OF RAW MATERIALS
SUPPLIERS OF PLANT AND MACHINERY
CONSULTANT AND TECHNOLOGY PROVIDER FOR PVC SOLVENT CEMENTS
APPENDIX – A:
01. PLANT ECONOMICS
02. LAND & BUILDING
03. PLANT AND MACHINERY
04. OTHER FIXED ASSESTS
05. FIXED CAPITAL
06. RAW MATERIAL
07. SALARY AND WAGES
08. UTILITIES AND OVERHEADS
09. TOTAL WORKING CAPITAL
10. TOTAL CAPITAL INVESTMENT
11. COST OF PRODUCTION
12. TURN OVER/ANNUM
13. BREAK EVEN POINT
14. RESOURCES FOR FINANCE
15. INSTALMENT PAYABLE IN 5 YEARS
16. DEPRECIATION CHART FOR 5 YEARS
17. PROFIT ANALYSIS FOR 5 YEARS
18. PROJECTED BALANCE SHEET FOR (5 YEARS)
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