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Phenolic resin plywood glue and formula thereof

A phenolic resin, plywood technology, used in aldehyde/ketone condensation polymer adhesives, adhesives, adhesive types, etc., can solve the problems of long aging time and pre-pressing time, lack of pre-pressing characteristics, etc. Aging time, reducing pre-pressing time, and satisfying the effect of pre-pressing bonding strength

Inactive Publication Date: 2013-04-24
郑梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current general-purpose adhesives require a long aging time and pre-pressing time to achieve satisfactory pre-pressing bond strength, or even if a suitable aging time is provided, they lack satisfactory pre-pressing characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0009] A phenolic resin plywood glue, characterized in that: the preferred glue formula is: water (at 18-24°C) 597 filler 235 unrefined potato starch mixed for 2min 57 phenolic resin mixed with water for 2min 136 50% NaOH aqueous solution Mix 25min 60 liquid phenolic resin mix 5min 1221.

[0010] Described phenolic resin is any basic phenolic resin condensate, free formaldehyde content is no more than 5% of resin solid, preferably prepares with phenol and formaldehyde (37% or 50% solution), wherein 15% of phenol amount can be obtained by Cresol, xylenol, polyphenylphenol instead; recipes using unrefined, semi-refined and refined native starches that contain at least 75% amylopectin in their molecular structure, such as: potato, yam, sweet potato , tapioca starch, corn starch in a.

[0011] The fillers include clay, talcum powder, white oxal, calcite, etc., and cellulose materials such as wood powder, bark powder, nut shell powder, etc.

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PUM

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Abstract

The invention relates to phenolic resin plywood and particularly relates to phenolic resin plywood glue, belonging to the technical field of chemical industry. Phenolic resin, amylum and a filling agent are provided in a formula of the phenolic resin plywood glue, wherein the molecule of amylopectin is generally heavier and more easily dispersed in a water solution to form high viscosity so as to have better stability; and the water loss of the amylopectin is easier than that of amylose under a pressurization condition. Therefore, the higher the content of the amylopectin is, the larger the branch structure part is, so that the phenolic resin plywood glue is suitable for being used as phenolic resin glue for making plywood.

Description

technical field [0001] The invention relates to a phenolic resin plywood, in particular to a phenolic resin plywood glue, which belongs to the technical field of chemical industry. Background technique [0002] In the production of plywood, the glued veneer is aged, the glue solution still maintains its fluidity, and then pre-pressed to dehydrate the glue solution, and the adjacent veneers are initially bonded, so in the subsequent operation, the billet formation The veneers can be arranged neatly without displacement. The current general-purpose adhesives require a long aging time and pre-pressing time to achieve satisfactory pre-pressing bond strength, or even if a suitable aging time is provided, they lack satisfactory pre-pressing characteristics. Therefore, it is necessary to find an adhesive formula that can reduce the aging time and pre-pressing time, and at the same time obtain satisfactory pre-pressing bonding strength. Contents of the invention [0003] The pur...

Claims

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Application Information

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IPC IPC(8): C09J103/12C09J161/06C09J161/10
Inventor 郑梅
Owner 郑梅
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