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The green environmental protection does not have pollution multicolor rainbow water-soluble pencil B8

按性质和用途可分为石墨铅笔、颜色铅笔、特种铅笔3类

  • 彩虹铅笔
  • VC-1025
Degree of hardness:
Color:
Pencil raw material mainly has the lead penstock needed materials, graphite lead raw material, color lead raw material and the outward appearance decoration needed materials and so on. The lead penstock needed materials mainly include the lumber and the binding agent. The lumber uses in manufacturing the penstock, the requirement texture is honest, the structure is thin and is uniform, nature soft or slightly soft, has brittleness slightly, little contains the resin, the water absorbability is low, the swell-shrink characteristics is small, does not distort. Mainly has the juniperus virginiana (sabina virginiana), the fragrant cedar, the theda wood, the basswood, the alder and so on. The binding agent should have the suitable viscosity, the fluidity and the wettability, after the hardening, the glue line has toughness, is small to the cutting tool damage, has certainly water resistant, heat-resisting, bears the aged performance, under the normal temperature easy to solidify, the firm time is short, non-toxic and so on. Mainly has the animal glue, the polyester sour ethylene emulsion, the thermal melt rubber and so on. Graphite lead raw material and accessory material raw material have the graphite and the clay. The graphite is the coloring agent, uses its creamy and the plasticity, makes the lead to be able to delimit the black trace, the reliable adherency on the paper surface, and can use the rubber to wipe off. Uses the carbon amount high elected, the pellet thin graphite. The clay is the cementing agent, uses its plasticity and cohesiveness, cakes the graphite pellet. The requirement plasticity is good, the iron content is low, agglutination scope wide clay.
铅笔原料主要有铅笔杆用料、石墨铅芯原料、颜色铅芯原料和外观装饰用料等。铅笔杆用料主要包括木材和胶合剂。木材用于制作笔杆,要求纹理正直,结构细而匀,质软或稍软,略带脆性,少含树脂,吸湿性低,胀缩性小,不变形。主要有铅笔柏(红柏)、香杉、西达木、椴木、桤木等。胶合剂应有适当粘度、流动性和润湿性,硬化后胶层有韧性,对刀具损伤小,具有一定耐水、耐热、耐老化性能,常温下易固化,硬化时间短,无毒等。主要有动物胶、聚酯酸乙烯乳液、热熔胶等。石墨铅芯原料和辅助材料原料有石墨和粘土。石墨为着色剂,利用其滑腻性和可塑性,制成铅芯能划出黑色痕迹,牢固粘附在纸面上,并能用橡皮擦掉。应选用含碳量高、颗粒细的石墨。粘土为粘结剂,利用其可塑性和粘结性,将石墨颗粒粘结起来。要求可塑性好,含铁量低,烧结范围宽的粘土。铅笔原料主要有铅笔杆用料、石墨铅芯原料、颜色铅芯原料和外观装饰用料等。铅笔杆用料主要包括木材和胶合剂。木材用于制作笔杆,要求纹理正直,结构细而匀,质软或稍软,略带脆性,少含树脂,吸湿性低,胀缩性小,不变形。主要有铅笔柏(红柏)、香杉、西达木、椴木、桤木等。胶合剂应有适当粘度、流动性和润湿性,硬化后胶层有韧性,对刀具损伤小,具有一定耐水、耐热、耐老化性能,常温下易固化,硬化时间短,无毒等。主要有动物胶、聚酯酸乙烯乳液、热熔胶等。石墨铅芯原料和辅助材料原料有石墨和粘土。石墨为着色剂,利用其滑腻性和可塑性,制成铅芯能划出黑色痕迹,牢固粘附在纸面上,并能用橡皮擦掉。应选用含碳量高、颗粒细的石墨。粘土为粘结剂,利用其可塑性和粘结性,将石墨颗粒粘结起来。要求可塑性好,含铁量低,烧结范围宽的粘土。