Patent ID: 7313906
Filing Date: 2008-01-01
Classification: D01C,D02G

Abstract:
1. A process for manufacturing yarn, which comprises a preliminary step of producing natural bamboo fiber and a spinning step of spinning the natural bamboo fiber, and further comprising a step of improving spinnability of the natural bamboo fiber, said improving step comprising: a. obtaining natural bamboo fiber; b. selecting natural bamboo fiber; in which the requirements for selecting natural bamboo fiber are that the fiber should be straight and order, to obtain a selected natural bamboo fiber; c. providing oil to the selected natural bamboo fiber to obtain an oil-treated natural bamboo fiber; in which the oil is a mixture of soap with emulsification oil, wherein the amount of emulsification oil is 1 to 1.8% by weight and the amount of soap is 0.5 to 0.9% by weight, both based on the weight of natural bamboo fiber; the oil is provided by immersing the fiber into oil after humidifying treatment at a temperature of 80˜90° C. for 3˜4 hours in a bath ratio of 1:6˜8; wherein the emulsification oil comprises 47˜53% by weight of plant oil, 0.04˜0.06% by weight of sodium hydroxide and 47˜53% by weight of water; and said plant oil has an acid number of less than 8, a saponification number of 185˜195 and an iodine value of 76˜83; d. drying the oil-treated natural bamboo fiber in a dryer after dehydrating it to obtain a dried natural bamboo fiber, wherein moisture regained after drying is 5˜9%; e. humidifying by spraying and providing oil to the dried natural bamboo fiber to obtain a humidified natural bamboo fiber, wherein the oil comprises 9˜10.6% by weight of kerosene, 0.3˜0.5% by weight of sodium carbonate, 6˜7.6% by weight of plant oil and 83˜84% by weight of water; and f. stacking the humidified natural bamboo fiber for 5˜7 days, wherein moisture regained is 10˜15%.