Technical requirements for raw materials to produce paper fa
pubdate:2009-05-25 17:30source:lvjoe writer:lvjoe macine ;
附件3： 纸面石膏板生产线原料的技术要求。
Annex III: Technical requirements for raw materials to produce paper faced gypsum board
一、 石膏矿半水石膏粉物化指标：
Hemi-Hydrate Gypsum Powder Properties:
|
指标名称PROPERTY INDEX |
型号 Type |
标准 Standard Value |
|
CaO%含量 CaO%(lime) Content |
α混合（αhemi-hydrate gyp.） |
＞35 |
|
β(βhemi-hydrate gyp.) |
＞30 |
|
|
SO3%含量 SO3% Content |
α混合（αhemi-hydrate gyp.） |
＞50 |
|
β(βhemi-hydrate gyp.) |
＞44 |
|
|
H2O%含量 H2O% Content |
α混合（αhemi-hydrate gyp.） |
＞5.5 |
|
β(βhemi-hydrate gyp.) |
＞5 |
|
|
酸不溶物含量 Acid Insoluble Material Content |
α混合（αhemi-hydrate gyp.） |
＜1 |
|
β(βhemi-hydrate gyp.) |
＜2 |
|
|
粒度 Particle size |
α混合（αhemi-hydrate gyp.） |
100目筛余2%（可调） Residue percentage on 100- mesh sieve: 2% (adjustable) |
|
β(βhemi-hydrate gyp.) |
100目筛余2%(可调) Residue percentage on 100- mesh sieve: 2% (adjustable) |
|
|
初凝时间(min) Initial setting time (min) |
α混合（αhemi-hydrate gyp.） |
＞7（可调adjustable） |
|
β(βhemi-hydrate gyp.) |
＞5（可调adjustable） |
|
|
终凝时间(min) Final setting time (time) |
α混合（αhemi-hydrate gyp.） |
＜30（可调adjustable） |
|
β(βhemi-hydrate gyp.) |
＜30（可调adjustable） |
|
|
2小时湿抗折(Mpa) Bending strength (tested when 2 hours after initial setting, the gypsum board under natural drying condition) |
α混合（αhemi-hydrate gyp.） |
＞2.4 |
|
β(βhemi-hydrate gyp.) |
＞2 |
|
|
Dry-resistant strength at |
α混合（αhemi-hydrate gyp.） |
＞5 |
|
β(βhemi-hydrate gyp.) |
＞4 |
二、淀粉要求：
Starch properties:
淀粉含量Starch content：＞80%
水份water content：≤10%
灰份ash content：≤6%
蛋白质Protein Content：≤0.3%
酸碱度(Acid or Alkaline Value) ：PH6-7
细度：
Particle: percentage of starch sample passed through
粘性性能：干结合2类，湿结合2-III类
Viscidity: Dry mixing property class:2 Wet mixing property class: 2-III
三、专用护面纸技术指标和性能要求：
Special faced paper technical and property requirements:
|
项目Item |
普通面纸 Common facing paper |
普通背纸 Common backing paper |
耐水面纸 Water-resistant facing paper |
备注 Remark |
|
|
表面颜色 Color |
白色或微黄 White or yellowish |
浅灰 Gray |
绿 Green |
|
|
|
厚度Thickness |
About |
||||
|
含湿率（ %） Moisture content |
7-10 |
7-10 |
7-10 |
Cobb试验 Cobb test |
|
|
60s表面吸水（g/m2）外侧 60 seconds outer side water absorptiveness (g/m2) |
15-25 |
15-25 |
15-20 |
Cobb试验 Cobb test |
|
|
60s表面吸水（g/m2）内侧（与石膏接触侧） 60s seconds inner side(witch touching the gypsum board) water absorptiveness (g/m2) |
15-25 |
15-25 |
15-25 |
试样宽 夹间距 Sample paper width: grips distance: |
|
|
纵向拉断强度(N) Longitudinal tensile strength |
230 |
225 |
230 |
|
|
|
横向拉断强度（N） Transverse tensile strength |
60-70 |
60-70 |
60-70 |
|
|
|
透气度(s/100ml/in） Air permeability (s/100ml/in) |
80-140 |
80-140 |
120-160 |
|
|
|
湿膨胀率 Wet expansion rate |
双向商定、面纸和背纸的湿膨胀率必须协调 The wet expansion rate of facing and backing paper must be identical |
||||
|
幅宽与石膏板产品相比 Roll Width compared to the gypsum board |
增加55 more 55 |
减少15 less 15 |
增加55 more 55 |
|
|
|
纸卷外径和重量 Paper roll O.D and Weight |
根据双方操作设备能力商定 According to the operating facility of the supplier and user |
||||
|
纸卷轴芯直径 Paper core I.D. |
根据买方设备情况确定 According to the operating facility of the supplier and user |
||||
|
包装 Packing Condition |
根据运输情况双方商定 According to transport conditions of the supplier and user |
||||
发泡剂
|
外观 |
浅黄色透明液体 |
|
石油醚可溶物含量 |
≤2.0% |
|
无机盐含量 |
≤2.5% |
|
活性物含量 |
≥30% |
|
色泽（APHA） |
50 |
白乳胶
|
粘度 |
≥5 |
|
PH值 |
5-9 |
|
固体含量 |
≥5 |
|
游离甲醛 |
≤1.5 |
|
外观 |
乳白色 无粗颗粒和异物 |
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