The invention relates to a bamboo material deep-processing product and a process method, in particular to a process technology for producing bamboo fiber by a physical and chemical method.
Objective of the invention The objective of the present invention is to provide a method for extracting natural bamboo fibers with a diameter of 0.03-0.4 mm and a length of 10-250 mm. This kind of bamboo fiber is different from the generally stubby or block-shaped bamboo fiber. It is a polymerized bamboo fiber blended with other fibers in the textile industry.
The basic principle of the production process of the present invention is to use physical and chemical methods of raw bamboo (bamboo pieces) to soften, remove sugar, fat, protein, and starch in an alkaline solution, and then undergo mechanical impact, tearing, and opening. Into bamboo fiber.
The process flow of the present invention is the cutting and breaking of raw bamboo, softening treatment, opening into fibers, washing and bleaching, dehydration and drying, sieving and packing into storage.
The specific production process of the present invention is as follows: A. Raw bamboo is cut and ruptured, and any bamboo is selected; the raw bamboo or bamboo slices are ruptured and cut into a sheet or plate mesh of no less than 50mm by manual or mechanical means; B. Softening treatment will The bamboo chips are softened in lye, while removing part of the sugar, fat, lignin, etc. in the bamboo, the softened bamboo chips are yellow; the method includes method one: putting the bamboo chips into the cooking container, adding alkali or liquid ammonia Dilute with water, the concentration of the solution is controlled at 1-20%, the liquid level is more than 1 mm above the bamboo slices, and the cooking temperature is above 90 ℃ under 1-6 atmospheres for more than 5 minutes;
Method 2: Put the bamboo slices in the soaking tank, add a solution containing alkali or liquid ammonia for soaking, the concentration of the solution is not less than 1%, the liquid level is more than 1 mm above the bamboo slices, and the immersion time is more than 10 hours; Method 3: The bamboo slices are soaked in lime water, and discharged in the order of laying a layer of lime on a layer of bamboo slices in the soaking pool. Finally, add water to the bamboo surface so that the water can completely submerge the bamboo slices. The soaking time is more than 7 days. The amount of lime is more than 5% of the amount of water; C. The bamboo chips after being opened into fibers and softened are torn apart on the nail-type bamboo fiber extractor, and opened into bamboo fibers containing residual alkali and bamboo powder; D. Washing and bleaching The bamboo fiber is put into the washing tank and washed with clean water, then sent to the bleaching tank and bleached with bleaching liquid under stirring, and washed again with clean water to obtain white bamboo fiber; the bleaching liquid is calcium hypochlorite solution or sodium hypochlorite solution , Potassium hypochlorite solution, or hydrogen peroxide, or direct chlorine gas into the bleaching tank, the concentration of the bleaching solution is above 0.01%, the solution temperature is above 1℃, and the bleaching time is above 5 minutes; only the unbleached bamboo fiber after washing is Yellow; E. Dehydration and drying The washed bamboo fiber is dehydrated by mechanical spin drying, vacuum, or plate pressing, and then sent to a dryer for drying or natural drying in the sun. After drying, the bamboo The fiber moisture content is 3-30%. F. The bamboo fiber after sieving, packing, storage, and drying is sent to a vibrating sieving machine for sieving to remove the thick and short fibers, bamboo stems, knots, bamboo heads, bamboo powder, and sifting out the length. Fiber, obtain the fiber that meets the requirements of the bamboo fiber standard, and package it into a finished product.
The product standard of the present invention 1. The appearance color is yellow; the diameter is 0.03-0.4 mm, and the length is 10-250 mm; 2. No impurities, insect infestation, and mildew; 3. Water content control at 3-30%; 4. Bamboo powder, The content of bamboo stems and bamboo heads is not more than 15%; 5. Residual alkali amount (1Kg fiber finished product is put into 24℃, 10Kg pure water soaks for 8 hours, the amount of alkali leached in the water) ≤ 5g The process method of the present invention is suitable for glass In the production of fiber substitutes and the inner material of the sewage treatment filter, through the comparative analysis of the use effect, this product can fully meet the performance requirements of the use, and has high environmental protection value and low economic cost.