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Shaving board producing method

A manufacturing method and particleboard technology, applied in the direction of manufacturing tools, pretreatment of molding materials, adhesive types, etc., can solve the problems of shortened service life, furniture performance and aesthetic decline, etc., to achieve low production cost, water absorption thickness expansion Efficient and stable, stable and excellent effect

Inactive Publication Date: 2009-01-21
DARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the particleboard continuously absorbs moisture in the air and contacts with water during use, which will inevitably lead to a decline in the performance and aesthetics of the furniture, and a serious shortening of the service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 The method of the present invention is used to produce an E0 grade particleboard board with low water absorption thickness expansion.

[0028] The usual manufacturing method of particleboard is: the raw materials are sliced, planed and dried, and the qualified surface layer and core layer shavings are screened out, and enter the surface layer and core layer silos respectively, and the layer and core layer shavings that meet the process requirements pass through their respective scrapers. The conveyor is sent to the glue mixing machine, and a certain amount of urea-formaldehyde resin, composite curing agent, formaldehyde scavenger and waterproofing agent are input, and the glue is mixed (sizing) in the glue mixer respectively; Shaped, then cooled, stacked, sanded, cut and inspected, and finally packaged for delivery.

[0029] The production method specifically comprises the steps:

[0030] A) using miscellaneous wood as the main raw material, through slicing, ...

Embodiment 2～3

[0052] Examples 2-3 respectively adopt the method of the present invention to manufacture E0 or E1 grade particleboard boards. The process steps adopted are the same as in Example 1, and the synthetic resin used, composite curing agent, formaldehyde trapping agent and waterproofing agent are all the same as Example 1, the difference is that the specific conditions are different in the sizing process, and the parameters such as sizing are shown in Table 5, the properties of the prepared plates are shown in Table 6:

[0053] table 5

[0054]

[0055] Table 6

[0056]

[0057] Note: The water absorption thickness expansion rate in the table is 2 hours

Embodiment 4～5

[0059] Examples 4 to 5 respectively adopt the method of the present invention to manufacture E0 or E1 level moisture-proof particleboard boards with low water absorption thickness expansion ratio. The process step adopted is the same as Example 1, and the synthetic resin used, composite curing agent, formaldehyde scavenger and waterproofing agent are all the same as Example 1, and the difference lies in the difference in the specific conditions in the sizing process, waterproofing agent, sizing amount Other parameters are shown in Table 7, and the properties of the prepared plates are shown in Table 8:

[0060] Table 7

[0061]

[0062] Table 8

[0063]

[0064] Note: TS in the table is the 24-hour water absorption thickness expansion rate

[0065] Compared with ordinary particleboard, this embodiment has high structural performance, and various physical and chemical properties have reached and exceeded the relevant national standards. The excellent low water absorptio...

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Abstract

The invention discloses a method for manufacturing shaving boards, which comprises a sizing process. The invention is characterized in that synthetic resin, compound curing agents, formaldehyde catching agents and waterproof agents for E1-level or E0-level shaving boards are used in the sizing process; wherein, the sizing amount accounts for 8 to 13 percent of the shaving amount; the application amount of the compound curing agents accounts for 1.48 to 2.5 percent of that of the synthetic resin; the application amount of the formaldehyde catching agents accounts for 0.0 to 3.0 percent of that of the synthetic resin; the application amount of the waterproof agents accounts for 0.45 to 1.8 percent of the shaving amount. In the method of the invention, the total molar ratio of urea resin is controlled in the range from 1.03 to 1.14, and E1-level or E2-level shaving boards with low thickness swelling rate can be manufactured by with the formaldehyde catching agents as complementation. The method has the advantages of low manufacturing cost, flexible manufacturing technology and high adaptability. The manufactured shaving boards have the advantages of stable and good performance, low thickness swelling rate, and low emission of free formaldehyde.

Description

technical field [0001] The invention relates to a manufacturing method of an artificial board, in particular to a manufacturing method of a particle board with low formaldehyde emission and low water absorption thickness expansion. Background technique [0002] The conventional particleboard manufacturing process is to process wood or various residues in wood production into shavings, add a certain amount of adhesive, and make finished products after stirring, paving and molding, hot pressing and other processes. Since air is used as the slab forming medium in the manufacturing process, the moisture content of the formed slab is only 5 to 16%; due to the lack of moisture in the slab, sufficient pressure and temperature cannot be formed between the shavings due to the lack of moisture. Therefore, a certain amount of adhesive must be added to improve the strength and water resistance of the finished product. [0003] Due to the excellent gluing performance and low cost of syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/02C09J161/24
Inventor 林宏治
Owner DARE TECH
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