CN101774190A - Carbon fiber fabric reinforced poplar laminated veneer lumber structural element and machining method thereof - Google Patents

Carbon fiber fabric reinforced poplar laminated veneer lumber structural element and machining method thereof Download PDF

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Publication number
CN101774190A
CN101774190A CN201010018399A CN201010018399A CN101774190A CN 101774190 A CN101774190 A CN 101774190A CN 201010018399 A CN201010018399 A CN 201010018399A CN 201010018399 A CN201010018399 A CN 201010018399A CN 101774190 A CN101774190 A CN 101774190A
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China
Prior art keywords
poplar
structural
fiber fabric
carbon fiber
laminated veneer
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CN201010018399A
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Chinese (zh)
Inventor
李世宏
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江苏省苏科建设技术发展有限公司
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Priority to CN201010018399A priority Critical patent/CN101774190A/en
Publication of CN101774190A publication Critical patent/CN101774190A/en

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Abstract

The invention discloses a carbon fiber fabric reinforced poplar laminated veneer lumber structural element and a machining method thereof. The structural element is characterized in that the structural element is prepared by alternately laminating and bonding poplar rotary slices (1) and carbon fiber fabric (2), and the structural element fully exerts the advantages of carbon fiber fabric and Italian poplar laminated veneer lumber, greatly improves the mechanical property of an Italian poplar material and the added value and the technological content of poplar production, and greatly broadens the application of field of the Italian poplar through the control of the process flow. Moreover, the structural element can avoid the problems of common anchor failure, peeling breakage and the like when the carbon fiber fabric is adhered outside and exerts the strength of the carbon fiber fabric more fully, so that the structural element can be manufactured into a large-scale lumber structural element and solves the problem that the large-scale lumber structural element cannot be produced currently.

Description

Carbon fiber fabric reinforced poplar laminated veneer lumber structural element and processing method thereof

Technical field

The present invention relates to the member that a kind of carbon cloth combines with the board using poplar board layer.

Background technology

The meaning poplar aboundresources of present China, accumulation is big, but this timber has its shortcoming, mainly shows as drying shrinkage, wet rising, and yielding, anisotropy is easy to degraded, rotten, easy firing etc. under water, heat, light, microbial action.Also there is inevitable defective in timber itself, by national standard " defects in timber " (GB155-84), defects in timber are divided into nine big classes promptly: knot, rotten, insect pest, crackle, stem form defective, wood structure defective, scar, abnormal deposit and timber manufacturing deficiency.These defectives cause in the arboreal growth process mostly, are inevitable.Wherein, be knot, rotten and crackle to the bigger defective of structure material material influence.These weak points have restricted the application of timber on engineering structure to a great extent.

Along with the great variety of world forest resources structure, high-quality timber resources is more and more rare, and people improve constantly the demand of wood-based product and the requirement of ecological environment, and the wood materials disparities between supply and demand become clear day by day.Along with the minimizing of big footpath level timber and the raising of timber serviceability requirement, the natural characteristic of original timber is difficult to satisfy the demand.Timber is processed into constituent elements such as plank, batten, veneer, wood shavings or fiber, utilize modern technologies that the timber constituent element is reassembled as the novel wooden material, as glue together that wooden frame, laminated veneer lumber, orientation are become a useful person, glued board, recombinant decorative veneer, laminated veneer lumber hollow circuit cylinder material, oriented wood chipboard, particieboard and fiberboard etc., these wooden recombined materials have the not available geometrical performance of original timber, homogeneity, uniformity and curve generating.

Laminated veneer lumber ((Laminated Veneer Lumber, be called for short LVL) is to be primary raw material with small dimension wood and low-quality material log, is peeled into veneer, becomes a useful person through rift grain assembly, gummed, hot-forming novel artificial.Laminated veneer lumber has not only kept the natural characteristic of timber, and the knot of log itself, crackle, defective random dispersal such as rotten be in material, and intensity and other physical properties are evenly and be higher than log, steady quality.

In short supply along with timber resources, utilize artificial fast-growing woods timber to make laminated veneer lumber and just becoming trend, be combined into new composite wooden material with timber and other material simultaneously and also become the research focus, relevant data shows: the bending strength of composite wooden material is three times of dimension stock of normal intensity grade, and rigidity improves 30%.It can not only keep former one-component material characteristic separately, and can performance complement, makes material have the excellent comprehensive performance.It is to alleviate the timber resources anxiety and promote one of effective way of the timber industrial structure that artificial fast-growing woods timber and composite wooden material are used.

With the poplar is that laminated veneer lumber is made on the basis, has not only brought into play himself advantage, has overcome the defective in material of poplar own and the processing, and intensity and other physical and mechanical property all are higher than poplar itself, and simultaneously, volume recovery is higher, remarkable in economical benefits; Compare log, laminated veneer lumber is more likely made the large scale structural elements.But the tensile strength of laminated veneer lumber is not high, and state many laminated veneer lumbers manufacturing enterprise can only produce non-structure and use poplar laminated veneer lumber as packaging material, influences the scope of application of poplar laminated veneer lumber.

Summary of the invention

Purpose of the present invention is exactly the above-mentioned deficiency at prior art, provide a kind of can be made into large-size components, in light weight, be subjected to the high carbon fiber fabric reinforced poplar laminated veneer lumber structural element of force intensity.

The technical solution used in the present invention is as follows:

A kind of carbon fiber fabric reinforced poplar laminated veneer lumber structural element is characterized in that it is to be formed by poplar rotary-cut sheet and carbon cloth intersecting gummed.

The thickness of described poplar rotary-cut sheet is less than 2mm.

Pass through the epoxy resin glue bond between described poplar rotary-cut sheet and the carbon cloth.

The processing method of above-mentioned carbon fiber fabric reinforced poplar laminated veneer lumber structural element is characterized in that:

The poplar material of will anticipating is made poplar rotary-cut sheet, and dried thickness is below 2mm;

With the two-sided phenolic resins fat of coating of poplar rotary-cut sheet, carbon cloth epoxy resin-impregnated glue;

With poplar rotary-cut sheet and carbon cloth intersecting gummed;

Under 140 ℃, 1.0MPa, 1min/mm condition, cold pressing more than 24 hours;

Product after will colding pressing is made perpendicular to glue-line bearing beam member or is parallel to glue-line bearing beam member.

Described rotary-cut wood chip preparation process before gluing is: Logs of small diameter → block → juggle softens → peeling → Veneer Cutting → shear → drying → veneer inclined-plane overlap joint.

The double spread amount of described poplar rotary-cut sheet is 320g/m 2

The double spread amount of carbon cloth is 300g/m 2

Temperature during meaning Yang Xuan chip drying is 150-200 ℃, and the control moisture content is below 5%.

Beneficial effect of the present invention has:

Give full play to the advantage of carbon cloth and meaning poplar laminated veneer lumber, greatly improved the mechanical property of meaning poplar material, improved poplar production added value and scientific and technological content, expanded the application of meaning poplar greatly.And carbon cloth is wrapped in timber inside, problem such as common anchoring inefficacy and stripping damage when avoiding carbon cloth to paste outward, carbon cloth intensity more can be given full play to, thereby can make large-scale wood structures, has solved the problem that can't produce large-scale wood structures at present.

Description of drawings

Fig. 1 is poplar rotary-cut sheet of the present invention and the compound structural representation of carbon cloth.

Fig. 2 is the production technology schematic diagram of the present invention during perpendicular to the glue-line bearing beam.

Production technology schematic diagram when Fig. 3 is parallel to the glue-line bearing beam for the present invention.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is further described:

As shown in Figure 1, the present invention is that carbon cloth and poplar rotary-cut sheet can adopt shop layer method assembly, uses the cold pressing forming process processing and manufacturing, and poplar rotary-cut sheet 1 and carbon cloth 2 mutual stacked gummeds are formed, by their combination, greatly improved the mechanical property of meaning poplar material.The thickness of described poplar rotary-cut sheet 1 is less than 2mm, and between poplar rotary-cut sheet 1 and the carbon cloth 2 by the epoxy resin glue bond.

Strengthen laminated veneer lumber with carbon cloth, during production, produce the laminated veneer lumber thin plate according to the laminated veneer lumber production technology earlier, separate into the laminated veneer lumber plate of respective length, width according to structural elements size saw, adopt again with laminated veneer lumber plate folding method and solve thickness problem, lay carbon cloth when superimposed.Reliable for guaranteeing carbon cloth and board using poplar board bonding, the bonding epoxide-resin glue that all uses between carbon cloth stickup of superimposed position and the poplar laminated veneer lumber, lamination process can not adopt heat pressing process (according to the concrete structure reinforcement experience, epoxide-resin glue is met elevated temperature strength and can be reduced even melt) should adopt cold-press process because of adopting epoxide-resin glue.Fig. 2, Fig. 3 are seen in adjusted technological process.

Logs of small diameter → block → juggle is softening → peeling → Veneer Cutting → shear → drying → veneer inclined-plane overlap joint → gluing → join base-→ precompressed → high frequency heat glue together → saw limit → sanding → according to member designs require saw separate → laminated veneer lumber thin plate → superposed surfaces is coated with epoxide-resin glue → superimposed (elder generation is coated with epoxy glue with carbon cloth cutting → carbon cloth and floods before, and is superimposed with the laminated veneer lumber thin plate again) → cold pressing → the member finished product.

Use structural elements according to above-mentioned explained hereafter test, the associated production technological parameter is as follows:

1) timber: for guaranteeing its intensity uniformity, the veneer number of plies there is strict demand, the superfine requirement more than 12 layers, 1 grade more than 9 layers, and 2 grades more than 6 layers.Adopting wood single-plate is the meaning poplar rotary-cut wood chip of northern Shuyang, Jiangsu, and the veneer nominal thickness is 2.0mm, and actual measurement average thickness 1.7mm makes member thickness and be two kinds of 150mm and 300mm, and the veneer number of plies reaches more than 70 layers.

2) adhesive: the board using poplar board adhesive is a phenolic resin glue, all about 320g/m of glue-spread 2(two-sided).Overlapping layers adopts epoxide-resin glue, and all about 300g/m of glue-spread is laid in carbon cloth dipping back 2(two-sided).

3) veneer lengthening: the distance that structure requires adjacent layer veneer joint to stagger with laminated veneer lumber is greater than in the slab 30 times of the thickest veneer thickness, and the distance of determining in conjunction with actual conditions is 80mm.

3) hot pressing: 140 ℃, 1.0Mpa, 1min/mm.Superimposed colding pressing the time: 24 hours.

4) maintenance:, answer maintenance to use after 72 hours after colding pressing because of superimposed employing epoxy resin tackifier.

The present invention's Yang Xuan section of likeing is 150-200 ℃ carrying out the baking temperature of high frequency heat before gluing together, and the control moisture content below 5% bubbling takes place in the time of can preventing hot pressing.

Other undeclared part of the present invention is same as the prior art.

Claims (8)

1. a carbon fiber fabric reinforced poplar laminated veneer lumber structural element is characterized in that it is to be formed by poplar rotary-cut sheet (1) and carbon cloth (2) intersecting gummed.
2. carbon fiber fabric reinforced poplar laminated veneer lumber structural element according to claim 1, the thickness that it is characterized in that described poplar rotary-cut sheet (1) is less than 2mm.
3. carbon fiber fabric reinforced poplar laminated veneer lumber structural element according to claim 1 is characterized in that between described poplar rotary-cut sheet (1) and the carbon cloth (2) by the epoxy resin glue bond.
4. the processing method of a carbon fiber fabric reinforced poplar laminated veneer lumber structural element is characterized in that:
The poplar material of will anticipating is made poplar rotary-cut sheet, and dried thickness is below 2mm;
With the two-sided phenolic resins fat of coating of poplar rotary-cut sheet, carbon cloth epoxy resin-impregnated glue;
With poplar rotary-cut sheet and carbon cloth intersecting gummed;
Under 140 ℃, 1.0MPa, 1min/mm condition, cold pressing more than 24 hours;
Product after will colding pressing is made perpendicular to glue-line bearing beam member or is parallel to glue-line bearing beam member.
5. the processing method of carbon fiber fabric reinforced poplar laminated veneer lumber structural element according to claim 4 is characterized in that rotary-cut wood chip preparation process before gluing is: Logs of small diameter → block → juggle is softening → and peeling → Veneer Cutting → shear → drying → veneer inclined-plane overlap joint.
6. according to the right processing method that requires 4 described carbon fiber fabric reinforced poplar laminated veneer lumber structural elements, the double spread amount that it is characterized in that poplar rotary-cut sheet is 320g/m 2
7. fiber cloth according to claim 4 strengthens the processing method of poplar laminated veneer lumber structural element, and the double spread amount that it is characterized in that carbon cloth is 300g/m 2
8. the processing method of carbon fiber fabric reinforced poplar laminated veneer lumber structural element according to claim 5, the temperature when it is characterized in that anticipating the Yang Xuan chip drying is 150-200 ℃, the control moisture content is below 5%.
CN201010018399A 2010-01-15 2010-01-15 Carbon fiber fabric reinforced poplar laminated veneer lumber structural element and machining method thereof CN101774190A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101967936A (en) * 2010-10-28 2011-02-09 连云港华展木业有限公司 Special composite board for door and window frame
CN102814842A (en) * 2012-09-06 2012-12-12 南京林业大学 High-strength thick laminated veneer lumber and manufacturing method thereof
CN103029412A (en) * 2012-12-14 2013-04-10 郑州兴旺木业有限公司 Processing method for laminated composite cutting die plate
CN103832042A (en) * 2014-03-20 2014-06-04 东北林业大学 Carbon fiber cloth reinforced type wood-plastic composite material and preparation method thereof
CN104191471A (en) * 2014-09-22 2014-12-10 广州厚邦木业制造有限公司 High-strength poplar laminated veneer lumber and manufacturing method thereof
CN104493917A (en) * 2014-12-02 2015-04-08 东北林业大学 Carbon fiber cloth reinforced poplar laminated veneer lumber and making method thereof
CN104592925A (en) * 2015-01-16 2015-05-06 辽宁省建设科学研究院 Preparation method of flame-retardant carbon fibre impregnation adhesive and composite material thereof
CN106079754A (en) * 2016-06-27 2016-11-09 贺滔 A kind of shellproof electrothermal compound plate and preparation method thereof
CN106239647A (en) * 2016-08-05 2016-12-21 贺州市恒达板业有限公司 A kind of manufacture method of carbon fiber ecological ornamental plate
CN106364050A (en) * 2016-08-31 2017-02-01 彭展忠 Composite floor for container
CN107433649A (en) * 2017-09-08 2017-12-05 山东协和学院 The construction technology of carbon fiber modifying quick growth poplar wood
CN107457873A (en) * 2017-08-07 2017-12-12 安徽温禾新材料科技股份有限公司 A kind of production technology of the solid wooden compound floor of carbon cloth enhancing
CN108127748A (en) * 2017-12-19 2018-06-08 北京林业大学 A kind of poplar laminated veneer lumber enhanced with flaxen fiber
CN109970401A (en) * 2019-04-21 2019-07-05 山东建筑大学 Quick growth poplar wood fiber high-intensity wall and preparation method thereof
CN110106990A (en) * 2019-04-21 2019-08-09 山东建筑大学 Outsourcing quick growth poplar wood fiber high-intensity wall and preparation method thereof

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101967936A (en) * 2010-10-28 2011-02-09 连云港华展木业有限公司 Special composite board for door and window frame
CN102814842A (en) * 2012-09-06 2012-12-12 南京林业大学 High-strength thick laminated veneer lumber and manufacturing method thereof
CN103029412A (en) * 2012-12-14 2013-04-10 郑州兴旺木业有限公司 Processing method for laminated composite cutting die plate
CN103832042A (en) * 2014-03-20 2014-06-04 东北林业大学 Carbon fiber cloth reinforced type wood-plastic composite material and preparation method thereof
CN104191471A (en) * 2014-09-22 2014-12-10 广州厚邦木业制造有限公司 High-strength poplar laminated veneer lumber and manufacturing method thereof
CN104493917A (en) * 2014-12-02 2015-04-08 东北林业大学 Carbon fiber cloth reinforced poplar laminated veneer lumber and making method thereof
CN104592925A (en) * 2015-01-16 2015-05-06 辽宁省建设科学研究院 Preparation method of flame-retardant carbon fibre impregnation adhesive and composite material thereof
CN106079754A (en) * 2016-06-27 2016-11-09 贺滔 A kind of shellproof electrothermal compound plate and preparation method thereof
CN106239647B (en) * 2016-08-05 2019-04-02 贺州市恒达板业有限公司 A kind of manufacturing method of carbon fiber ecological ornamental plate
CN106239647A (en) * 2016-08-05 2016-12-21 贺州市恒达板业有限公司 A kind of manufacture method of carbon fiber ecological ornamental plate
CN106364050A (en) * 2016-08-31 2017-02-01 彭展忠 Composite floor for container
CN107457873A (en) * 2017-08-07 2017-12-12 安徽温禾新材料科技股份有限公司 A kind of production technology of the solid wooden compound floor of carbon cloth enhancing
CN107433649A (en) * 2017-09-08 2017-12-05 山东协和学院 The construction technology of carbon fiber modifying quick growth poplar wood
CN107433649B (en) * 2017-09-08 2019-07-16 山东协和学院 The construction technology of carbon fiber modifying quick growth poplar wood
CN108127748A (en) * 2017-12-19 2018-06-08 北京林业大学 A kind of poplar laminated veneer lumber enhanced with flaxen fiber
CN109970401A (en) * 2019-04-21 2019-07-05 山东建筑大学 Quick growth poplar wood fiber high-intensity wall and preparation method thereof
CN110106990A (en) * 2019-04-21 2019-08-09 山东建筑大学 Outsourcing quick growth poplar wood fiber high-intensity wall and preparation method thereof

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Open date: 20100714