Birch Throughout Plywood Inspections and QC checklists

Birch Throughout Plywood Inspections and QC checklists

在胶合板行业里,有一些创新型的企业,一直在努力的学习国外的胶合板制作工艺,提高着自己的产品品质,一直不被行业在意的全桦木胶合板就是其中之一。因为它的生产复杂,原材料几乎是全靠进口,极易受到原材料的限制,加之桦木密度大,不易加工,容易出现各种价格缺陷。而且其价格昂贵,所以在国内普通市场很难推广。

In the plywood industry, some innovative enterprises have been working hard to learn the production process of plywood abroad and improve the quality of their products. The full birch plywood which has not been cared about by the industry is one of them. Because of its complex production, raw materials almost rely on imports, and are very vulnerable to the restrictions of raw materials, coupled with birch density, difficult to process, prone to various price defects. And its price is expensive, so it is difficult to promote in the domestic ordinary market.

如果真有实际的需要,白桦全桦木胶合板的生产和质量控制,需要注意以下几点:

If there is a real need, the production and quality control of full birch plywood should pay attention to the following points:

1.全桦,是指100%的桦木,面皮和芯板单板全部是桦木。

1. full birch refers to 100% birch wood, and all the veneers of face and core veneers  are birch wood. birch face veneer normally 1.0mm to 1.4mm ,UPM WISA and SEVZA use 1.4mm ,but local markets are normally use 1.0mm to 1.2mm .

2.桦木单板的质量和厚度及公差。

2. Quality, thickness and tolerance of birch veneer.

3.桦木面皮的厚度,是否是整张。

3. Is the thickness of birch face veneer the whole piece ?

4.芯板铺板的结构,整张化还是传统的三五拼结构。一般俄罗斯采用的都是全整张化。

4. The structure of core veneer is the traditional three-and-five-piece structure.

5.胶水的甲醛使用,胶合强度,由于桦木材质坚硬,建议使用酚胶。

5. The use of formaldehyde glue, bonding strength, because birch wood is hard, the use of phenolic glue is recommended.

6.热压时候的压力和热压时间。

6. Pressure and time of hot pressing.

7.边部和内部的单板层次是否清晰,叠离芯是否严重

7. Whether the edge and inner veneer layers are clear or not, and whether the overlap is serious or not.

8.含水率的控制。

8. moisture content control.

9.一般全桦木的胶合板面皮用的比杨木芯的桦木胶合板面皮要厚的多,这个从工厂的原材料可以看到,也可以在抛光后看到。

9. In general,full  birch plywood veneer is much thicker than poplar core birch plywood veneer. This can be seen from the raw materials of the factory, and can also be seen after polishing.

10.桦木面皮的级别

10. Grade of birch veneer

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