Manila and Sisal Fibers.
Manila hemp, as it is called, is a product of our Philippine dependency, being obtained from a species of the banana plant which grows abundantly in those islands. Its fiber is very long, ranging from six to ten feet, and is noted for its smoothness and pliability, a feature which makes it ideal for rope making. Gloss and brilliancy are also characteristics of good quality Manila.
American Hemp Stacked in Fields
Manila hemp is obtained from the leaf stalks of the Philippine plant known as the Abacá, the leaf stems of which are compressed together, and constitute the trunk of the plant. It is obtained by scraping the pulp from the long fibers, drying these when thoroughly cleaned, and baling them for market.
The high price of the Manila product, however, has brought a cheaper fiber, of American growth, into the market; this being that known as Sisal, extracted from henequen, a cactus-like plant of Yucatan. As a substitute for or rival of Manila hemp it has come into common use. Its cheapness recommends it despite the fact that it is not of equal strength, and also that its fibers are shorter, being from two to four feet in length. Sisal also lacks the flexibility of Manila, being much more stiff and harsh. The development of the self-binding reaper on our western grain-fields has opened a gold mine for Sisal cordage. Of the annual import of this fiber to the United States, 300,000,000 pounds in quantity, a large proportion finds its way to the wheat fields of the West. It is also used in all other wheat-yielding countries.
Philippine Hemp Cart
Loading Fiber from Sisal Fiber Plant onto Plantation Car
Henequen is now grown on large plantations, the plant being about five years old before the long, sword-like leaves are ready to cut. It continues to yield a supply for ten or twenty years, this lasting until the flower stalk, or “pole,” appears, after which the plant soon dies. As Manila fiber is at times adulterated with Sisal, so has the latter its adulterant in a plant called Istle, which grows in Mexico and has hitherto been chiefly used in brush making.
| New Zealand Hemp or Flax | Crude Hand Method of Cleaning Manila Fiber on Plantation |
These are the chief plants used in rope making. To them we may add coir, obtained from the brush of the cocoanut, which has been long used in India, and has come into use in Europe in recent years. It is fairly strong and has the advantage of being considerably lighter than hemp or Manila. And, unlike these, it does not need to be tarred for preservation, as it is not injured by the salt water. Two other rope-making fibers of importance are the Sunn hemp of India and cotton, ropes of the latter being largely used for certain purposes, such as driving parts of textile machinery.