Low-key wood - Italian poplar
Poplar is a promising tree species. Because poplars mainly rely on asexual reproduction and dioecious, people use a variety of varieties that are easy to hybridize with different sexes, creating a variety of fast-growing, high-yield, resistant New hybrid varieties of pests and diseases have solved the problem of timber sources in a short period of time. A lot of furniture is made of boxwood in the poplar tree species. Today, Xiaobian will take you to find out what the purpose of Yang is.
Yiyang has become the main raw material for the production of wood-based panels such as plywood, blockboard, medium-density fiberboard and particleboard.
In recent years, in addition to large plywood plants, the general plywood factory has no longer rotated the veneers. Most of the new plywood factories do not have rotary cutting machines and dryers, all of which rely on the purchase of veneers to produce plywood. Most of the core boards are made of Yiyang veneer. It is both economical and economical to purchase the veneer directly from the Yiyang production area.
However, there are some problems in the processing of Yiyangmu. For example, defects such as warpage and deformation occur during drying. Then how to avoid this drying defect?
It is more suitable to use the first-cut and dry-drying process when producing the Yiyang veneer, to ensure uniform drying. The core and sapwood should be stacked, aged and dried as much as possible during the rotary cutting and shearing.
Two-stage drying method
In the first stage, the thick veneer is dried by a roller dryer to a moisture content of 16% to 20%. In the roller dryer, the roller has the effect of “smoothing†on the veneer, which greatly reduces the deformation rate and improves the plate yield.
The second stage is hot plate drying, and the thick veneer to be cut is put into a multi-layer laminator and dried to a moisture content of 8%.
In order to shorten the drying time, the press can be frequently opened and closed during the hot plate drying cycle to remove moisture from the veneer.
Is it true that poplar can only be used for making plates?
The answer is NO
Wood chips can also be used to make hardwood pulp for the production of high-grade paper.
The discarded mixture of Italian poplar and corn cob is used as a carbon source matrix.
Cultivation of seafood mushrooms in different proportions can increase its yield. This can reduce resource waste and environmental pollution, and reduce production costs and improve efficiency.
The poplar wood laminated plastic board has a greater degree of improvement in physical mechanical properties and dimensional stability than ordinary poplar plywood.
It is suitable for use as a high-wear and corrosion-resistant surface layer material for asymmetric structural plywood for passenger car floor. It is a new utilization method of fast-growing wood and has broad application prospects and market potential.
Document.body.oncopy = function () { setTimeout( function () { var text = clipboardData.getData("text"); if (text) { text = text + " This article comes from China Wooden Door Network, China's well-known wooden door industry portal Website! (http://) Detailed reference: "+location.href; clipboardData.setData("text", text); } }, 100) }The Face access control attendance machine is mainly used for the attendance statistics of the company's employees. Have Android attendance Face Recognition and Linux attendance face recognition When employees sign in, they need to collect the employee's facial photos through the camera, and then use the attendance face recognition algorithm to obtain the feature values from the collected photos and store them in the database in face access control attendance system. Analyze and compare the feature values of the employee's face photos. If the employee's name is reported after the recognition is successful, the attendance is successful.
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