Special filler for plywood glue
Technical field
The invention belongs to the production of glued board, refer to a kind of Special filler for plywood glue especially.
Background technology
Current China artificial liner enterprise is in the process making core-board, glued board, building template glued board, and first want impregnation, so-called impregnation is exactly in urea formaldehyde glue, dose a large amount of weighting agents, to reach the object that gluing on veneer is convenient in thickening.Mainly select whole meal flour for the material as weighting agent at present, the addition of flour is mainly determined according to the quality (mainly referring to that water content is how many) of glue, and general glue per ton doses flour amount between 30%-40%.
Publication number is disclose a kind of high efficiency filling material for veneer board in the patent documentation of 1820914, it is the meal utilizing the organic and inorganic mineral such as wood powder, albumen blood meal to mix, thickening power is played with organobentonite, inorganic bentonite and organic cellulose, filling effect is played with wood powder, play a part to increase viscosity with amonang powder, water glass and albumen blood meal, and water glass and albumen blood meal also have the effect absorbing formaldehyde.It is high that above-mentioned prior art also exists albumen blood meal cost, and the weighting agent color of making is bad, and water glass (sodium silicate) does not allow to make carton as requested, the problem such as the water tolerance of weighting agent itself is poor.
Summary of the invention
The object of the present invention is to provide a kind of water tolerance comparatively strong, formaldehyde absorption function, Special filler for plywood glue that cost is lower can be had.
Overall technology design of the present invention is:
Special filler for plywood glue, make after even by the component mixture of following unit mass part:
Cortex Pini powder 250-350 powdered rice hulls or peanut hull meal 150-300 rod soil or silica powder 120-200 expanded corn starch 350-400 sweet potato vine powder or pachyrhizus granulated slag 100-180 powdery sanitas 18-35 bacterium must 5-15 clearly.
Concrete technical conceive of the present invention also has:
For improving weighting agent uniformity coefficient and resolution in glue further, meet the bonding that it comparatively can be used on veneer, preferred technical scheme is simultaneously.Cortex Pini powder, powdered rice hulls or peanut hull meal, the granularity of sweet potato vine powder or pachyrhizus granulated slag is not less than 120 orders, and the granularity of rod soil or silica powder is not less than 325 orders, and the granularity of expanded corn starch is not less than 200 orders.
Selecting of powdery sanitas can adopt multiple starting material, wherein comparatively preferably adopts Sodium Benzoate.
In the present invention, the effect of each component is:
Be main making raw material owing to adopting Cortex Pini powder in the present invention, except wherein increasing except toughness containing more wood fibre, wherein also containing tannin and rosin, tannin can be released at high operating temperatures, because tannin has natural aldehyde effect of going out, so can effectively PARA FORMALDEHYDE PRILLS(91,95) remove.Rosin effectively can improve its water tolerance in glued board high-temperature thermo-compression formation process; Rod soil in stopping composition and silica powder, mainly containing the composition such as silicon-dioxide, aluminium sesquioxide, also can improve the water tolerance of stopping composition further.Powdered rice hulls and peanut hull meal etc., containing fiber, can increase the toughness of stopping composition.Expanded corn starch mainly increases the viscosity of glue.The Main Function of sanitas (Sodium Benzoate) prevents starch from becoming rotten.Bacterium must clear Main Function be prevent powder and slag class material mouldy.
The urea-formaldehyde glue adopting stopping composition of the present invention to add detects through national wood-based plate and Bamboo and wood product Quality Supervision and Inspection Center, the burst size of its free formaldehyde is 0.07%, meet in GB/T14732-2006 the requirement of the burst size of free formaldehyde being answered to≤0.3%, adopt the inspection of glued board through Hebei province's wood-based panel product quality monitoring testing station (Wenan) prepared by the urea-formaldehyde glue adding stopping composition of the present invention, detected result is the detection length of censorship glued board is 2440.0-2440.5mm, width is 1220.0-1220.5mm, thickness is 9.0mm, tolerance 0.2-0.4mm/m is directly spent in edge, squareness tolerance is 0.3-0.4mm/m, angularity is 1.0%, water ratio is 9.1%, bonding strength average out to 0.79MPa, burst size of methanal is 1.0mg/L, the detected result of above leading indicator all meets the relevant requirements of GB/T9846-2004.
Substantive distinguishing features acquired by the present invention and significant technical progress are:
Overall preparation technology of the present invention is simple, and raw material sources are extensive, compatibility is reasonable and cost is lower, select Cortex Pini powder as main raw material, product can be made to possess certain function removing formaldehyde, can strengthen the water tolerance of glued board simultaneously.
Embodiment
Be further described of the present invention below in conjunction with embodiment; but it is not as a limitation of the invention; the content that protection scope of the present invention is recorded with claim is as the criterion, any according to the equivalent technical elements replacement done by this specification sheets, does not all depart from protection scope of the present invention.
Embodiment 1
Special filler for plywood glue, make after even by the component mixture of following unit mass part:
Cortex Pini powder 250 powdered rice hulls or peanut hull meal 150 rod soil or silica powder 120 expanded corn starch 350 sweet potato vine powder or pachyrhizus granulated slag 100 powdery sanitas 18 bacterium must clear 5.
Cortex Pini powder, powdered rice hulls or peanut hull meal, the granularity of sweet potato vine powder or pachyrhizus granulated slag is 120 orders, and the granularity of rod soil or silica powder is 325 orders, and the granularity of expanded corn starch is 200 orders.
Powdery sanitas adopts Sodium Benzoate.
Embodiment 2
Special filler for plywood glue, make after even by the component mixture of following unit mass part:
Cortex Pini powder 350 powdered rice hulls or peanut hull meal 300 rod soil or silica powder 200 expanded corn starch 400 sweet potato vine powder or pachyrhizus granulated slag 180 powdery sanitas 35 bacterium must clear 15.
Cortex Pini powder, powdered rice hulls or peanut hull meal, the granularity of sweet potato vine powder or pachyrhizus granulated slag is 150 orders, and the granularity of rod soil or silica powder is 350 orders, and the granularity of expanded corn starch is 250 orders.
Powdery sanitas adopts Sodium Benzoate.
Embodiment 3
Special filler for plywood glue, make after even by the component mixture of following unit mass part:
Cortex Pini powder 300 powdered rice hulls or peanut hull meal 250 rod soil or silica powder 160 expanded corn starch 380 sweet potato vine powder or pachyrhizus granulated slag 150 powdery sanitas 28 bacterium must clear 8.
Cortex Pini powder, powdered rice hulls or peanut hull meal, the granularity of sweet potato vine powder or pachyrhizus granulated slag is 120 orders, and the granularity of rod soil or silica powder is 325 orders, and the granularity of expanded corn starch is 200 orders.
Powdery sanitas adopts Sodium Benzoate.
Embodiment 4
Special filler for plywood glue, make after even by the component mixture of following unit mass part:
Cortex Pini powder 280 powdered rice hulls or peanut hull meal 280 rod soil or silica powder 180 expanded corn starch 360 sweet potato vine powder or pachyrhizus granulated slag 140 powdery sanitas 26 bacterium must clear 10.
Cortex Pini powder, powdered rice hulls or peanut hull meal, the granularity of sweet potato vine powder or pachyrhizus granulated slag is not less than 120 orders, and the granularity of rod soil or silica powder is not less than 325 orders, and the granularity of expanded corn starch is not less than 200 orders.
Powdery sanitas adopts Sodium Benzoate.