面巾纸的生产工艺(中英文).doc

面巾纸的生产工艺
3.1原料进口漂白针叶木浆，白度89%，纤维平均长度1. 80mm，打浆度16. 5°SR，湿重18g。
3.2 工艺流程漂白浆→碎浆机→双圆盘磨浆机→原浆仓→配浆仓→调浆箱→混合池→高位箱→锥形除渣器→稳浆箱→网槽→干燥→卷取
3.3 打浆工艺打浆浓度4.0%-4.5%，电流120-160A，打浆度45-48°SR，湿重6-9g。
3.4 抄纸工艺纸机抄宽1575mm，车速80-100m/min。助剂的加人：湿强剂WA0.05%-0.1%（对绝干浆）调浆箱内加人，分散剂PEO0. 05% - 0. 10％高位箱内加入，黏度2. 06 mPa•s，扭矩51. 50#转子，150rpm，温度25．5℃）。
3.5 分散剂的溶解按0.03％的溶解浓度计算，称取4kg分散剂平均放入2个料斗内。首先在溶解槽内加水至第一组叶翅，开动搅拌器，搅拌速度为40r/min，开始加分散剂。 料斗内的分散剂经气流吹散，均匀地落在水膜上，进人到溶解槽内，整个加料过程不得少于40min，补加水到规定液位，再继续搅拌40min（气温低时在生产允许条件下，应尽可能延长搅拌时间或提高溶解水温度在50℃左右），制备完毕。经60目筛网导入分散剂贮存槽内备用。溶解时，将分散剂均匀地分散在水中的操作极其重要，应尽量使分散剂颗粒在进人溶解槽之前被水包覆，否则容易导致分散剂结块溶液中产生果冻状难溶物。在搅拌和加人的过程中应尽可能地避免受过分的剪切。搅拌后，时间充足情况下，可适当延长静止存放时间，使溶液有足够的时间熟化，使分散剂的溶解更加充分。溶解后的PEO要及时使用，存放时间不宜超过48h，溶解浓度越低，存放时PEO降解越快，一般12h用完效果最佳。分散剂溶液在制备和输送过程中很容易吸附水中的微小杂质形成“黏状脏料”附着在制备槽、输送管道的内壁，如果这些脏料进入上浆系统，会影响成纸质量和纸机的正常抄造。因此很有必要进行过滤、清洗、杀菌工作。PEO是一种有机高分子量聚合物，从某种意义上说，它也是细菌、微生物的营养物质，尤其是在高温季节，有必要在系统中加入一定量的杀菌剂。
Production process of tissue paper

3.1 raw materials imported coniferous wood pulp bleaching, white degree is 89%, the average fiber length 1 80mm, beating degree 16.5 ° SR, wet weight of 18G.

3.2 The process of bleaching pulp, pulp machine, double disc refiner, puree bin, slurry bin, mixing tank, mixing tank, high tank and the centricleaner, stable slurry tank and the net groove, drying and coiling.

3.3 refining process of beating concentration 4.0%-4.5%, current 120-160A, beating degree of 45-48 ° SR, wet weight of 6-9g.

3.4 papermaking technology of paper machine copy width 1575mm, speed 80-100m/min.
Additives added: wet strength agent WA0.05%-0.1% (absolute dry pulp) into the mixing tank, dispersing agent PEO0. 5% - 0.10% high viscosity is added, 2.06 mPa • s, torque of 51.5% (0# rotor, 150rpm, temperature 25.5 ℃).

3.5 dispersing agent dissolved in dissolved concentrations 0.03% computation, weigh 4kg dispersing agent evenly into 2 hopper.
First in the dissolving tank with water to the first group of leaf wing, start the mixer, stirring speed is 40r/min, start adding dispersant.
The hopper dispersant by air blown, uniformly falls in the water film, into dissolved groove, the whole feeding process shall not be less than 40min,
add water to the specified level, continue stirring 40min (when the temperature is low in the production permit conditions, as far as possible to prolong mixing time or high dissolved water temperature at about 50 ℃), preparation.
Through 60 mesh sieve into the dispersing agent storage tank reserve.
When dissolved, dispersing agent dispersed evenly is extremely important in the water of the operation, you should try to make the dispersant particles before entering the bath water coating, otherwise easily lead to disperser caking, produce jelly like insoluble substance in solution.
In the process of mixing and people should be as much as possible to avoid excessive shear.
After mixing, time enough, it may be appropriate to extend the static storage time, the solution has more time to ripen, dissolving dispersing agent more fully.
After the dissolution of PEO use in time, storage time should not exceed 48h, the dissolved concentration is lower, when storing PEO degradation more quickly, the general 12h run out the best.
Dispersant solution to form a "sticky dirty material" attached to the preparation of inner groove, pipeline in the tiny impurities preparation and is easily adsorbed water in the process of conveying,
if these dirty material into the sizing system, will affect the normal production of paper quality and the paper machine.
It is necessary to carry out the filtering, cleaning, sterilization work. PEO is a kind of organic high molecular polymer, in a sense, it is the nutrients of bacteria, microorganism,
especially in high temperature season, bactericide is necessary to add a certain amount in the system.