CN1470371A - Low-toxicity waterproof homogeneous chipboard - Google Patents
Low-toxicity waterproof homogeneous chipboard Download PDFInfo
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- CN1470371A CN1470371A CNA021326851A CN02132685A CN1470371A CN 1470371 A CN1470371 A CN 1470371A CN A021326851 A CNA021326851 A CN A021326851A CN 02132685 A CN02132685 A CN 02132685A CN 1470371 A CN1470371 A CN 1470371A
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- toxicity
- waterproof
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- chipboard
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Abstract
The invention refers to a kind of low-toxin even water-tight flakeboard. The wood is planed, grinded, and added in several chemical material, and shaped. The structure of the product is between middle density fiber board and flakeboard, it hasn't prominent shade structure, and it has a high intensity and processing performance. The standard length: above 915 mm; width: above 915 mm; thickness 4 mm.
Description
Technical field:
The present invention relates to a kind of particieboard, particularly relate to a kind of low-toxicity waterproof homogeneous chipboard, belong to wood processing field.
Background technology:
Present particieboard is mainly based on three layers, and wherein two-layer up and down is identical materials, i.e. uniform particles and smaller, and the particle of intermediate core layer is coarse with respect to the plasmid of levels, and be waterproofing agent with paraffin.Facts have proved the less stable of this particieboard, and, understand a large amount of suctions behind the chance water and cause product not re-use than being easier to aliquation.Be that intensity is relatively poor, processing characteristics is also bad, water resistance is bad.
Summary of the invention:
The object of the present invention is to provide a kind of low-toxicity waterproof homogeneous chipboard, its structure is between medium density fibre board (MDF) and particieboard, no obvious gradation structure, be that top layer and core material are basic identical, and dose the marine glue of compliance with environmental protection requirements, once hot-forming wooden flake board, its water resistance is good, higher intensity and better machining property are arranged.
Technical scheme of the present invention is: the process of low-toxicity waterproof homogeneous chipboard is: raw material (timber) is carried out flaking, polishes, doses marine glue, through hot-forming, carry out sawing, sanding by the requirement of low-toxicity waterproof homogeneous chipboard.Its technological process is as follows:
A, raw material chipped and flaking after polish;
Carry out sorting after B, the drying, carry out secondary polishing back again and add the marine glue stirring;
Mat formation after C, marine glue are mixed thoroughly, after hot pressing, carry out sawing and sanding.Marine glue prescription: formaldehyde (37%): 3000～3100KgNaOH (30%): 6000～5010g urea (99%): 1600～4900Kg melamine: 200～220Kg formic acid (10%): 4500～5200g dehydrating amount :-990Kg amounts to: 3821～7240Kg resin index: theoretical solids content 77.6%; Actual 65% ± 1 water-soluble 1: 2～1: 2.5 density 1.280～1.290Kg viscosity (20 ℃ are coated with cup) 80～120 " viscosity (25 ℃ of viscosimeters) 400～600cpsPH value 8.0～8.5 hardening times (100 ℃) 40～60 " whole mol ratio 1: 1.05～1.20 stability (20 ℃) one month
The specific embodiment:
The invention will be further described below in conjunction with embodiment: low-toxicity waterproof homogeneous chipboard may further comprise the steps: (1) raw material is selected and is chipped; A, raw material maximum secting area are no more than 420cm
2(when being undersized log, maximum gauge is no more than 23cm), during near this face, length should not be above 2 meters.Cutting raw material moisture content is with relative moisture content about 40%, rottenly accounts for 1/2, and can not enter wood chipping equipment with the afforestation butt of big line.B, brush wood that flexibility is exceeded standard should enter wood chipping equipment after reducing camber again blocking with electric chain saw on the field that feeds intake, and length is below 4 meters.(2) wood shavings preparation and dried, classified: raw material timber or brush wood will dig into wood shavings through the ring type flaking, and its thickness is 0.2～0.4mm.After finishing, wood shavings preparations enters next step operation, i.e. particle drying, and the moisture content of wood shavings that enters drying machine usually is generally between 40～60%.Moisture content after the oven dry is 0.8～1.5%, and per hour measures once.The classified screening machine of wood shavings after the oven dry carries out sorting, i.e. fines district, sediment outflow district and coarse fodder district.The wood shavings in fines district directly enter next step, and the coarse fodder district carries out the circulation of an above-mentioned steps again, and the waste material in sediment outflow district just is out of use.(3) add marine glue: its prescription is formaldehyde (37%): 3020Kg; NaOH (30%) is for the first time: 1600～1800g; Urea (99%) is for the first time: 800～1000Kg; Melamine: 200～220Kg; Formic acid (10%): 4500～5200g; NaOH (30%) is for the second time: 3000～3500g; Dehydrating amount :-990Kg; Urea (99%) is for the second time: 400～600Kg; Urea (99%) is for the third time: 400～600Kg amounts to: 3821～7240Kg.The marine glue of above prescription evenly and after the wood shavings stirring is entered the program of mating formation.(4) hot pressing, sawing and sanding: the slab after mating formation is through unit pressure 40kg/cm
2, hot pressing temperature is 190-210 ℃, the highlyest is not more than 220 ℃.The programming rate of pressing plate is for per hour being not more than 30 ℃.Particieboard after the hot pressing needs be cooled to 50-70 ℃ of plate central temperature through the star cooler cooling, after decompose successively in order; Low-toxicity waterproof homogeneous chipboard saw limit should the side of rule, and it is neat that four limits are straight, plate length 3690mm, and the diagonal difference is less than 5mm.Particieboard after the sawing is carried out the packing of grading after the sanding.This product quality performance: density 0.93g/cm
3Density variation+1.0%-2.2%; MOR 28.4Mpa; Internal bond strength 1.39Mpa; Surface bonding strength 1.76Mpa; 24h thickness swelling rate 7.2%; Free formaldehyde release 5.3%.Specification is: more than the length 915mm; More than the width 915mm; Thickness 4mm is above also can be made up arbitrarily as required.
Claims (2)
1, a kind of low-toxicity waterproof homogeneous chipboard, it is characterized in that: production craft step is as follows:
A, raw material chipped and flaking after polish;
Carry out sorting after B, the drying, carry out secondary polishing back again and add the marine glue stirring;
Mat formation after C, marine glue are mixed thoroughly, after hot pressing, carry out sawing and sanding.
2, a kind of low-toxicity waterproof homogeneous chipboard is characterized in that: the prescription of low-toxicity waterproof glue is:
Formaldehyde (37%): 3000～3100Kg
NaOH(30％)： 6.00～5.01kg
Urea (99%): 1600～4900Kg
Melamine: 200～220Kg
Formic acid (10%): 4.5～5.2kg
Dehydrating amount :-990kg
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021326851A CN1470371A (en) | 2002-07-25 | 2002-07-25 | Low-toxicity waterproof homogeneous chipboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021326851A CN1470371A (en) | 2002-07-25 | 2002-07-25 | Low-toxicity waterproof homogeneous chipboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1470371A true CN1470371A (en) | 2004-01-28 |
Family
ID=34145274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021326851A Pending CN1470371A (en) | 2002-07-25 | 2002-07-25 | Low-toxicity waterproof homogeneous chipboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1470371A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889563A (en) * | 2010-06-01 | 2010-11-24 | 温世权 | Novel application of particle boards to manufacturing of fish tank |
| CN102350721A (en) * | 2011-09-28 | 2012-02-15 | 浙江农林大学 | Method for preparing fiber particle board |
| CN105082316A (en) * | 2015-07-07 | 2015-11-25 | 鸿伟木业（仁化）有限公司 | Production process for eucalyptus veneer formaldehyde-free shaving board |
-
2002
- 2002-07-25 CN CNA021326851A patent/CN1470371A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889563A (en) * | 2010-06-01 | 2010-11-24 | 温世权 | Novel application of particle boards to manufacturing of fish tank |
| CN102350721A (en) * | 2011-09-28 | 2012-02-15 | 浙江农林大学 | Method for preparing fiber particle board |
| CN102350721B (en) * | 2011-09-28 | 2014-07-16 | 浙江农林大学 | Method for preparing fiber particle board |
| CN105082316A (en) * | 2015-07-07 | 2015-11-25 | 鸿伟木业（仁化）有限公司 | Production process for eucalyptus veneer formaldehyde-free shaving board |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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