About UsSANVAN INDUSTRIES envisages the establishment of a plant for the production of twine and rope with a capacity of 1000 tons per annum. Twine and rope a linear collection of plies, yarns or strands which are twisted or braided together in order to combine them into a larger and stronger form and are used for multiple applications.
The demand for synthetic twine and rope is met entirely from import. The present (2019) demand for twine and rope is estimated at 20000 tons. The demand for twine and rope is projected to reach 35000 tons and 50000 tons by the year 2024 and 2029 respectively.
The principal raw materials required are poly propylene (polyethylene) resin and pigment (master batch) which have to be imported.
A rope is a bundle of flexible fibers twisted or braided together to increase its overall length and tensile strength. The use of ropes for hunting, carrying, lifting, and climbing dates back to prehistoric times. Ropes were originally made by hand using natural fibers. Modern ropes are made by machines and utilize many newer synthetic materials to give them improved strength, lighter weight, and better resistance to rotting. More than half of the rope manufactured today is used in the fishing and maritime industries.
Rope construction involves twisting fibers together to form yarn. For twisted rope, the yarn is then twisted into strands, and the strands twisted into rope. Three-strand twisted rope is the most common construction. For braided rope, the yarn is braided rather than being twisted into strands. Double-braided rope has a braided core with a braided cover. Plaited rope is made by braiding twisted strands. Other rope construction includes combinations of these three techniques such as a three-strand twisted core with a braided cover. The concept of forming fibers or filaments into yarn and yarn into strands or braids is fundamental to the rope-making process.
PP ropes made from fibrillated flat tapes have already replaced cotton, jute, sisal fiber and manila fiber ropes all over the world. The advantage of PP ropes is its strength, light weight, long life, and water resistance. These ropes find application in many a field such as defense industry, navy, shipping & marine industry, fishing Industry, petroleum Industry, electricity boards, port trust and dock-yards, paper plants, sugar mill, transport industry, railways and agriculture etc.
The advantage of PP ropes is its strength, light weight, long life, and water resistance. These ropes find application in many a field such as defense industry, navy, shipping & marine industry, fishing Industry, petroleum Industry, electricity boards, port trust and dock-yards, paper plants, sugar mill, transport industry, railways and agriculture etc.
The future of rope making is directly linked to improvements in materials. Over the years, almost every conceivable type of rope configuration has been attempted. In the past, new materials have allowed rope makers to reduce the diameter of the rope while maintaining the tensile strength and improving the resistance to weathering and abrasion. It is expected that a new generation of very strong, very light fibres and forming techniques will produce even further improvements in ropes.
The level of quality control depends on the intended use of the rope. Ropes intended for general purpose use are sold by diameter and tensile strength. Tensile strength is determined by breaking a sample piece under load. Basic raw material specification and a visual inspection are the only quality control measures used for these ropes. Ropes intended for high-risk applications—such as rappelling, rescue work, and lifting objects over people—are more closely inspected and tested. These ropes have a finite service life and may also have a color code or other coding to indicate the date of manufacture. Should any abrasion or overextension of the rope occur, this filament would be exposed, indicating an unsafe condition and requiring that the rope be replaced. The average rope life-span is 5 years. Serious inspection should be given to line after that point. However, the use to which a rope is put affects frequency of inspection. Rope used in mission-critical applications, such as mooring lines or running rigging, should be regularly inspected on a much shorter timescale than this, and rope used in life-critical applications such as mountain climbing should be inspected on a far more frequent basis, up to and including before each use