JP2020089978A - Semi-combustible or flame retardant wood, and its production method - Google Patents

Abstract

To provide a semi-combustible or flame retardant wood capable of exhibiting homogeneous fire-resistance performance, and provide its production method.SOLUTION: A cross grain plate 11 of only sapwood of a conifer and a diffuse-porous hard wood is used as raw material, and these are laminated through adhesives 14. An injection slit 21 of a predetermined depth is formed at 13 of the cross grain plate 11 at appropriate intervals. The cross grain plates are laminated with the adhesives 14 using the overlapping surface 13 as the inside. Non-combustible chemicals such as the water-solubility is injected into the laminated material 15 being laminated by decompression and pressurization. In the front and rear surfaces of a semi-combustible or flame retardant wood 10, chemicals are injected from the surface in diffusion mainly at depth of approximately around 5-mm. In the central part, the chemicals moved to the fiber direction after passing an outer face 12 are injected in a portion of the depth of the injection slit 21. instead of performing total inspection of the amount of chemicals of all products, 30-samples are collected every lot, and the quality control of the chemicals injection amount in the wood is performed in an accuracy level being the same as the total inspection by using an average value and a standard deviation value.SELECTED DRAWING: Figure 3

Description

The present invention relates to quasi-incombustible or flame-retardant wood and a method for producing the same.

(Current status of semi-incombustible or flame-retardant wood)
Many of the chemical-injected woods in circulation today are manufactured by impregnating wood materials with chemicals for preservative, insect repellent, flame-retardant and semi-combustible treatment. For example, by adopting the method of injecting a drug into a lumber product or laminated lamina, it is possible to slightly increase the amount of the drug injecting part by performing an insizing process. The degree varies greatly. As a result, there was a large variation in the performance of the chemical-injected wood and the performance of the wood products, and some of them did not meet the standard value of the chemical-treated wood. When the flame-retardant quasi-incombustible wood material in which the chemical injection is insufficient is heated, it reaches a high temperature range of around 200°C or higher, and combustible gas is generated from the wood tissue of the insufficient area. The fire resistance of the gas is greatly impaired by the ignition of the gas.

(Today's changing timber market in Japan)
An overview of today's timber market in Japan shows the following changes.

The market for single-family wooden houses, the largest market for timber, is shrinking due to the declining birthrate and aging population.
On the other hand, in medium and large-scale buildings where an unspecified number of people gather, such as public facilities, shops, offices, and lodging facilities, it is required to create "comfortableness" and "fashionable image". The market is growing. In such large and medium-sized buildings where an unspecified number of people gather, safety in the event of a fire is an important factor, so there is a demand for timber that meets the stable performance of "flame-retardant and semi-incombustible" It has increased.

(Problems and effects of conventional products and technologies)
Next, a summary of the problems and effects of the conventional product technology that has been provided to date is as follows.

-For flame-retardant/semi-incombustible wood used in conventional products, there is a portion where the injection amount of the non-combustible treatment chemical is insufficient. As a result, products with insufficient performance are sometimes found, and the reliability of the performance of flame-retardant/semi-incombustible wood is impaired.
・In order to use the minimum injection amount as a reference value, over-injection of non-combustible chemicals has been carried out, resulting in increased costs and white bleaching on the product surface.
・Due to the immaturity of process control and quality control, variations in performance have occurred, and the adverse effect of insufficient process and quality control capabilities is becoming apparent.

(Technical basic knowledge)
The technical basic knowledge of the present invention is as follows.

Knowledge of the fact that almost no liquid water or aqueous solutions migrate in wood except sapwood.
Knowledge of the fact that the movement of liquid water or aqueous solutions in wood is predominantly in the fiber direction and very slow in the fiber orthogonal direction.
・Knowledge about the fact that aqueous solutions infiltrate sapwood of conifers and diffusers hardwood, but ring-hole hardwood is difficult to infiltrate even with sapwood.
-There are three types of chemical injection treatments depending on the purpose of chemical treatment, but insect repellent treatment (medicine injection to the white line zone and sapwood that are rich in nutrients of insects such as starch) and preservative treatment (chemical treatment only on the peripheral area of wood) ) And semi-incombustible/flame-retardant chemical treatment (homogeneous chemical injection treatment on wood) are clearly distinguished, and treatment suitable for semi-non-combustible/flame-retardant chemical treatment (homogeneous chemical injection treatment on wood) is performed. What it should be.
・Manufacturing methods and quality control that are more than the minimum standard value may result in unstable processing such as excessive injection, so for products that require safety, statistical figures are used for performance and quality control. It should be controlled by (standard deviation, process control capability value).
・Flame-retardant/quasi-non-combustible wood injection agents often have adhesion inhibiting factors, and if they are adhered after injection, they often do not have sufficient adhesive strength for their intended use.

(Prior art document and its problems)
Prior art documents relating to such fire-resistant modified wood materials include Patent Documents 1 to 5, but do not indicate a technique in which the sapwood portion is clearly distinguished from the core material portion and the sapwood portion. Of course, there has been no proposal to positively utilize the fact that the sapwood has the property of allowing the liquid to favorably move in the fiber extending direction.

Specifically, in paragraph 0014 of the specification of Patent Document 1, a range having a large width of 6 to 72 hours is set for the time for performing the dipping treatment. The reason is that the thickness and arrangement of the conduits are different from each other. They point out that they differ depending on the type, and as a specific example, the sapwood has a thick conduit and a coarse density. However, in Patent Document 1, it is out of the scope that the coniferous tree and the broad-leaved tree cannot be distinguished in the first place. Moreover, in the following paragraphs of the specification, the cedar and paulownia planks are used as the raw material wood, and the core material and the sapwood are not used separately and described as if a conduit were present. There is no conduit itself in the cedar that is being used, and for paulownia, an aqueous solution can be injected around the sapwood conduit because it is a broad-leaved hardwood, and when the sapwood is cedar or paulownia the conduit is thick and dense. There are doubts about the recognition itself as low. As described above, in Patent Document 1, on the premise that the core material portion and the sapwood portion are not used separately, in other words, the noncombustible wood board is manufactured by adjusting the processing conditions without separately using the core material portion and the sapwood portion. It is acknowledged that this is a disclosure of the technical idea that it is possible.

Even in Patent Document 2, it is shown in the specification paragraph 0011 that the conduit and its peripheral portion are impregnated with a sufficient refractory agent. As paulownia wood is used as the above, the heartwood portion and the sapwood portion are not used separately. As described above, in Patent Document 2, on the premise that the heartwood portion and the sapwood portion are not used separately, in other words, even if the heartwood portion and the sapwood portion are not used separately, the fire-resistant chemical liquid and the woodwood impregnated in the paulownia wood are It discloses the technical idea that the non-combustible property can be remarkably improved by forming a glass-like film, which is presumed to have been formed by a cross-linking reaction of tannin potentially impregnated with heat. Is recognized.
In addition, the inventor of the present invention has never heard that paulownia wood has a unique tannin, and even if the cross-linking reaction, it is still an organic matter, and as long as it is considered that the fire resistance is irrelevant. Is.

In Patent Document 3, the chemical solution is adhered only to a plurality of recess-forming projections and the projection is pressed against a dried veneer, whereby the veneer is compressed to a thickness equal to or less than that and the chemical solution is separated. The present invention proposes a method for injecting a drug solution into a veneer, which comprises contacting the plate and then separating the projections from the veneer to allow the drug solution to penetrate into the tissue of the veneer. However, in the method of Patent Document 3, it is unlikely that the chemical will enter the interior of the wood, and the core material and the sapwood are not used separately, and even if the chemical solution is attached only to the recess forming projections, In the heartwood, there is almost no movement of the drug solution.

In Patent Document 4, a cavity portion and a groove portion that are continuous or intermittent in the length direction of the square bar are formed in a laminated portion of the plate except the front side portion and the rear side portion of the square bar, and these cavities are formed. The filler is injected into a part of the groove or the groove to form a number of wall components, and the wall components are stacked in the vertical direction and connected by the coupling means. It has been proposed to inject a filler into the injecting part to close the joint gap between the respective wall components and construct an integral wall. However, even in Patent Document 3, the core material portion and the sapwood portion are not separately used, and the chemical solution hardly moves in the core material portion. Moreover, in Patent Document 4, the chemical solution can be injected into the cavity or the groove formed between the plate materials, but the chemical solution cannot be injected into the inside of each plate material. The movement of the drug solution inside cannot be expected either.

In Patent Document 5, the chemical liquid is dropped into a groove formed by splitting each of the four surfaces of the wood by sawing and then poured into the wood. In addition, holes are made from each of the four sides of the wood at right angles to the back split, and the resin that has flowed inside the wood enters the lateral holes and becomes a strong bone. We propose wood and processed wood products whose surfaces are treated with chemicals when the synthetic resin liquid is cured. However, even in Patent Document 5, the core material portion and the sapwood portion are not used separately, and it is difficult to move the chemical liquid in the core material portion. In addition, the groove formed by splitting the back with a saw is provided along the direction in which the fibers of the wood extend, and it is almost impossible to expect the chemical solution to move between the grooves.

Japanese Patent No. 4221599 JP, 2007-63749, A Japanese Patent No. 3344703 JP, 11-131635, A JP-A-8-281203

An object of the present invention is to improve the reliability of fire resistance performance of semi-incombustible or flame-retardant wood.
Another object of the present invention is to provide a method for producing semi-incombustible or flame-retardant wood with improved reliability regarding fire resistance.

As a means for solving the above problems, the present invention provides a quasi-noncombustible or flame-retardant wood obtained by laminating sapwood only of sapwood of softwood and hardwood of diffused hole as a raw material, and laminating these with an adhesive. To do.

That is, the important points of the present invention in comparison with the above-mentioned prior art documents are the following three points.
1. Injecting by utilizing the knowledge that the aqueous solution drug can easily move in the fiber direction of the wood sapwood.
2. Injecting a drug in the central part of the product by inserting a slit for injection in the direction orthogonal to the fiber in order to equalize the injection of the drug and adhering the faces of the siding board provided with the injection slit.
3. The quality control method to confirm that the existence of medicines is leveled should be established by introducing statistical values.
That is, a predetermined number (for example, 30) of samples of the non-combustible chemicals in the wood are sampled for each lot, and the quality control is performed with the same accuracy level as the 100% inspection by the average value and standard deviation value.

Specifically, slits for injection having a predetermined depth are formed in the overlapping surface of the grain board at a suitable interval in a direction intersecting the fiber extending direction with a saw or the like.
A plurality of siding boards are laminated with a water resistant adhesive or the like with the superposed surface having the injection slits inside.
Non-combustible chemicals such as water-soluble are decompressed/pressurized into the laminated siding.

The front and back surfaces of the quasi-incombustible or flame-retardant wood thus obtained have a depth of about 5 mm, and the chemical agent is injected mainly from the front surface by diffusion.
The drug enters the central portion through the injection slit, and the drug that has penetrated satisfactorily moves along the fiber extending direction of the sapwood, so that the drug is entirely injected.
After injection under reduced pressure and pressure, it is desirable to take an appropriate curing time to level the amount of drug inside the product.

There are injection slits at a specified interval in the center of the semi-incombustible or flame-retardant wood product in the thickness direction, but there is no scratch on the front and back surfaces, so the appearance is not damaged and the injection slits match perfectly. By carrying out so as not to do so, it is possible to prevent the strength of the product from being extremely lowered.

INDUSTRIAL APPLICABILITY The present invention can provide quasi-incombustible or flame-retardant wood with improved reliability regarding fire resistance.
INDUSTRIAL APPLICABILITY The present invention has been able to provide a method for producing semi-incombustible or flame-retardant wood with improved reliability regarding fire resistance.

1 is a description of a cross-sectional structure of raw wood for obtaining a siding board for semi-incombustible or flame-retardant wood according to an embodiment of the present invention. (A) A perspective view of a siding plate for the same semi-incombustible or flame-retardant wood, and (B) a perspective view of a laminated material in which the sizing plates are adhered to each other. (A) Sectional view of semi-incombustible or flame-retardant wood, (B) Sectional view of semi-incombustible or flame-retardant wood according to another embodiment. The semi-incombustible or flame-retardant wood which concerns on other embodiment which devised for lengthening the distance of a slit is shown, (A) The top view of one board, (B) The other board 2C is a plan view of a laminated material in which both eye plates are laminated.

Embodiments of the present invention will be described below with reference to the drawings.
(Overview)
The semi-incombustible or flame-retardant wood 10 according to the present embodiment is formed by stacking a plurality of (two upper and lower in the example of FIG. 2) grain boards 11 and laminating with an adhesive 14. As shown in FIG. 1, each siding plank 11 is composed of only a sapwood portion A of either softwood or hardwood, and along the longitudinal direction of each siding plank 11. , The fibers are stretched.

A plurality of injection slits 21 are formed on the overlapping surface 13 of each plate 11 and each overlapping surface 13 is formed between the left and right side surfaces of the plate 11. Each injecting slit 21 extends so as to traverse the fiber. At least one end, preferably both ends, of the injection slit 21 is opened as an injection opening 23 on the left and right side surfaces of each of the plank plates 11, that is, the completed quasi-incombustible or flame-retardant wood 10.

The incombustible treatment chemicals 31 that have moved along the fibers from the injection slits 21 are present in each siding board 11, and the incombustible treatment chemicals 31 diffused from the outer surface 12 are present in the upper and lower siding boards 11. Due to the presence, the semi-incombustible or flame-retardant wood 10 is in a state where the non-combustible treatment chemical 31 is present in the entire inside thereof, and the performance as the semi-incombustible or flame-retardant wood is secured.

(Production of grain board 11)
In general, wood is often divided into a sapwood part and a heartwood part.The sapwood part refers to the whitish part of the outer peripheral color in the log cross section, and the heartwood part is the center part of the log cross section. It is said that it refers to the reddish part of the color of, but more specifically, the heartwood part can be divided into two regions, immature part and mature part in the central part, and sapwood part and heartwood part. There may be a white line band in the boundary area of. Therefore, as shown in FIG. 1, the sapwood portion A, the white line band B, the core material aged portion C, and the heart material unaged portion D can be divided into four regions from the outside.

In the present invention, only the sapwood portion A in which the liquid can move in the direction in which the fiber extends in the wood is used, and the grain board 11 whose longitudinal direction is the direction in which the fiber extends from this portion (longitudinal direction of the standing tree) Are manufactured by cutting. The remaining white line band B, the heartwood aged portion C and the heartwood unaged portion D are to be used for other purposes.

In general, the sapwood part and the heartwood part are often distinguished by the color difference by visual observation of the cross section, but depending on the tree species, there may be no color difference or the four areas should be clearly separated. Some things are difficult on the top. Therefore, it is preferable to carry out a colorant injection test on wood obtained from standard raw wood, which serves as an index prior to mass production, and confirm the movement state of the colorant in the fiber extending direction.

The thickness of the plank plate 11 can be variously changed and implemented, but for example, a plate material (grain) having a thickness of 12 mm to 20 mm is used as a raw material in the peripheral portion of the raw wood called a back plate that appears when sawing the raw wood into pillars and beams. It is preferable that
More specifically, the material size of the grain board 11 is 12 mm to 20 mm in thickness, 100 mm to 200 mm in width, and 1 m to 4 m in length.

In particular, since water is a liquid and difficult to move in the knot portion, it is preferable to use the knotless portion in terms of quality stability.
Further, when the length is tied, the adhesive layer extends so as to cut the fiber, and this serves as a wall to prevent the infiltration of the drug. Therefore, as a general rule, the lengths of the raw material plates are not connected.

It is preferable to carry out preliminary drying after the lumbering. Specifically, it is naturally dried until the free water in the wood is exhausted, more specifically, the water content is 20% or less. On the other hand, excessive drying with a water content of 10% or less is unsuitable because it may cause a problem in the wettability (wetting) of wood.
In addition, it is preferable that the obtained wood be planarized to have a thickness of 9 mm to 17 mm from the viewpoint of quality uniformity.

(Processing of injection slit 21)
Assuming that the chemical solution such as the non-combustible treatment chemical 31 mainly moves in the fiber direction, for the injection that extends in the direction crossing the fibers of the grain board 11 on the overlapping surface 13 where the grain boards 11 are overlapped and bonded. The slit 21 is formed. Specifically, the injection slit 21 is preferably slit by a saw in a direction of 45 degrees from a right angle with respect to the fiber extending direction.

The width of the injection slit 21 is appropriately wide enough to allow the aqueous solution to pass, and specifically, it is preferably about 2.5 mm to 3.0 mm.
The depth of the injection slit 21 is preferably formed from the overlapping surface 13 toward the other surface so that about 5 mm remains from the slit bottom. Although it depends on the thickness of the grain board 11, it is appropriate that the depth is 1/2 to 2/3 of the thickness.

In addition, the spacing between the injection slits 21 should be such that, in consideration of the type of tree and the growing area, a distance that has sufficient margin for infiltration in a preliminary test of dyeing solution injection is for each raw material lot (tree species, production area, raw material receiving lot). ) Is appropriate.
A material 16 for a temporary lid such as a thin tape (for example, width: 5 mm to 10 mm) such as thin paper is attached to the release surface 22 of the injection slit 21. This makes it possible to prevent a large amount of the adhesive agent 14 from flowing into the inside of the injection slit 21 and obstructing the chemical solution infiltration when the plate-shaped boards 11 are adhered to each other. It may be omitted depending on the properties and the adhesion conditions. Further, a closing sheet having substantially the same size as the overlapping surface 13 may be attached to the entire surface of the overlapping surface 13 as long as it can cover the injection slit 21 without being limited to the tape. Various modifications can be implemented.

(Lamination process)
A laminated material 15 shown in FIG. 2(B) is manufactured by superimposing the overlapping surfaces 13 of a plurality of (two in FIG. 2) planks 11 with an adhesive 14 and adhering them according to a conventional method. .. As the adhesive 14, various water-resistant adhesives 14 that can be used for laminating wood can be adopted.

(Injection of drug)
The chemical injection process is a step of injecting the non-combustible chemical into the laminated material 15 that allows easy water movement. Specifically, a semi-combustible or flame-retardant wood 10 in which an aqueous solution of a non-combustible/quasi-incombustible/flame-retardant treatment agent is injected into the laminated material 15 is completed using a depressurization/pressure injection can (see FIG. )reference). In the grain board 11 obtained from the sapwood part A, since the conduits and temporary conduits that have not yet lost the liquid permeability extend continuously in the fiber direction (arrow direction), the injection slit 21 and The movement of injecting the chemical solution from the surface of the wood is quick, and the semi-incombustible or flame-retardant wood 10 can be impregnated with the fire-resistant chemical. Further, the chemical can be impregnated from the outer surface 12 of the semi-incombustible or flame-retardant wood 10 by diffusing the chemical into the inside. The impregnation by diffusion is about 5 mm from the outer surface 12 of the quasi-incombustible or flame-retardant wood 10. However, as described above, the depth of the injection slit 21 should be the depth until about 5 mm remains from the slit bottom. Thus, the entire inside of the laminated material 15 can be impregnated with the chemical.

Note that the impregnation state of the chemical liquid changes depending on the type of wood and the growth state, so depressurization conditions and times, pressurization conditions and times, and the number of repetitions should be confirmed by conducting preliminary experiments using water-soluble coloring agents. Preferably.
In addition, it is preferable to measure the weight before and after the injection and manage the difference as the average injection amount of the lot as the injection amount for process control.

As shown in FIG. 3(A), the non-combustible treatment chemical 31 that has entered the injection slit 21 from the pouring opening 23 moves in the fiber direction, so that the non-combustible treatment chemical 31 is applied to the central portion of the thickness of the laminated material 15. A wall that suppresses gas generation from the wood is formed at the center by infiltration, and a wall that suppresses gas generation is formed near the surface of the laminated material 15 by diffusion of the non-combustible treatment chemical 31 from the outer surface 12. In this way, by forming the walls with the non-combustible treatment chemicals 31 at the three surfaces of the front surface, the central portion and the back surface in the thickness direction, it is possible to combine the high heat insulating property of the wood with the wood material (that is, the semi-non-combustible material) Create flame-retardant wood 10). In addition, when using the two eye plate 11, it is possible to specify the lamination dimension having a thickness of 18 mm to 34 mm, a width of 100 mm to 200 mm, and a length of 1 m to 4 m, but these numerical values are changed. You may implement it.

For example, when it is desired to increase the stacking thickness, as shown in FIG. In such a case, it is desirable to form and implement the injection slits 21 on the upper and lower surfaces of the inner plate 11. The depth of the injection slit 21 of the inner plate 11 is preferably such that the upper and lower plate plates 11 do not have an interval in the thickness direction, and preferably have such a length that they partially overlap each other. is there. Further, it is preferable to provide the zigzag patterns 11 in a zigzag manner in the longitudinal direction of the grain board 11 in a position where they do not overlap each other, from the viewpoint of maintaining the strength of the completed semi-incombustible or flame-retardant wood 10.

Further, as shown in FIG. 4, when the injection slits 21 are formed to be inclined, it is preferable that the injection slits 21 are arranged and formed so as to cross each other in a plan view.
In order to enhance the effect of drug injection and reduce the amount of drug-containing waste material, it is preferable to process the product into a size and shape close to the finished state in advance before injecting the drug.

(Process after injection)
Curing: Curing is preferable to level the interior of the injected chemicals in the wood, and the curing period is determined by preliminary experiments.
Drying: The water content is controlled in order to satisfy the quality of the product as determined by the arrangement with the customer. From the viewpoint of improving quality, it is preferable to carry out artificial drying.

Finishing: In order to satisfy the specified conditions as a product, the plate width is a lip saw, the length is a cross cut saw, and the surface is finished with a sander.
Inspection: Perform the inspection required to satisfy the quality of the product. For example, the thickness and width are measured with a caliper, the length is measured with a steel tape measure, and the appearance and surface property are visually confirmed and touched.
Packing: Semi-non-combustible or flame-retardant wood 10 products are bundled in small units and covered on six sides to block moisture from the outside air, or covered with kraft paper to prevent damage to the load and fixed with tape, etc. Apply.

The semi-incombustible or flame-retardant wood 10 according to this embodiment can exhibit substantially uniform and excellent fire resistance performance as the entire fire-resistant modified wood material. When a wood-based material in which there is an insufficient drug injection portion is heated, it reaches a high temperature range of around 200°C or higher, and a flammable gas is generated from the wood tissue of the insufficient portion, and the gas is ignited. .. As a result, the fire resistance performance is greatly impaired, but since the semi-incombustible or flame-retardant wood 10 of the present invention is impregnated with a sufficient amount of the fire-resisting chemicals almost entirely, flammable gas is generated from the wood tissue. It is possible to suppress the occurrence and to exhibit stable fire resistance performance.

(Process control)
In carrying out the present invention, process control is important so that all produced semi-incombustible or flame-retardant woods 10 exhibit stable fire resistance.
-Confirmation of infiltration length After pre-drying, 4 to 6 samples are taken for each production lot, and a dye injection test is performed to confirm the infiltration length of the drug. The test method is to make a slit in the center of the length of 1.2 m, seal both wood openings, inject the dye solution under reduced pressure and pressure, and then cut every 10 cm to dye the cut surface. Check the liquid infiltration property. After confirmation, slits shall be made about every half of the maximum infiltration length.

-Measurement of water content before injection Since the water content before injection affects the impregnation of the drug, it is important to measure the water content by measuring with a high-frequency water content meter. Desirably, six test pieces are randomly sampled for each production lot, and the measurement is also performed by the total dry method.

・Measurement of drug injection amount A sufficient amount of drug is injected by measuring the weight of the injection lot before and after the depressurization/pressurization process for each injection lot and managing the difference as the average drug injection amount of the lot. Check whether or not

-Measurement of water content after drying Six samples are taken for each production lot, the weight is measured by the total dry method, and the water content is estimated by subtracting the average drug amount from the measured weight. Create a correlation table between this value and the high-frequency water content meter to measure the water content of a small lot of products.

-Confirmation of dimensional accuracy Measure the thickness and width of quasi-incombustible or flame-retardant wood 10 with calipers. The accuracy depends on the agreement with the customer.
The length of the semi-incombustible or flame-retardant wood 10 is measured with a steel tape measure. The accuracy depends on the agreement with the customer.

・Product inspection Visual inspection of all products is performed. The content depends on the agreement with the customer.
・Checking the packaging After binding the product, cover all six sides with a plastic sheet to prevent contact with the outside air.
Wrap with pallet and kraft paper, which are necessary to prevent scratches from handling.

・Confirmation of marking Affix a paper with the following contents on the outside and the outside of the packaging.
Product name, product grade, raw material tree type, processing chemical type, product size, product quantity (quantity), producer name, production location, production lot number and bundle number.

(quality management)
In addition to the above-mentioned process management, quality control is thoroughly performed, and only products with stable fire resistance are shipped.

・Combustion test = Conduct in accordance with the MLIT Ordinance. Specifically, a corn calorimeter is used to measure the number according to the necessary parameter under predetermined conditions. The accuracy of process control can be improved by creating a record of the relationship between the corn calorimeter test result and the injection amount for each injection lot.

-Adhesion test = JAS interior laminated wood is tested for each production lot.
・Drug injection amount management = management of the drug amount before and after drug injection (frequency = for each injection lot). Specifically, the weight of the material placed on the trolley before and after the injection is measured, and the difference is calculated and divided by the wood volume to obtain the average amount of the injected drug per m3 of the lot. It is confirmed that the obtained statistical value (average value−3σ) of the injected drug amount exceeds the acceptable standard drug amount (σ=standard deviation).
-Variance management = Partial variation in the amount of drug is managed (frequency = each order lot, in the case of ready-made products, each production lot). Specifically, samples are taken every 30 cm from the both ends of the product length to 10 cm inside, and a total of 30 samples are taken. The specific wavelength spectrum of the incombustible drug is photographed with a hyperspectral camera on the wood surface of each sample, and the amount of near-infrared specific wavelength spectrum reflected by the incombustible drug is measured. It should be noted that a correlation table between the drug concentration and the reflection amount of the specific spectrum wavelength is prepared and executed.

Calculate the average value (AVE) and standard deviation (σ) of the incombustible drug amount measurement values of 30 samples, confirm that AVE-3σ exceeds the minimum required drug amount, and confirm the accepted lots. Ship.
As described above, in the quality control according to this embodiment, instead of inspecting all the drug amounts of all products, the quality control of the drug injection amount in wood is performed using the average value and the standard deviation value. .. Specifically, instead of inspecting all the drug amounts in all products, 30 samples are randomly sampled at a predetermined distance (for example, every 10 cm) from a site that is more than a predetermined distance (for example, 30 cm) from the surface of the product. , A hyperspectral camera is used to take an image of the forefront, and the amount of the injected drug is measured by the amount of wavelength reflected light peculiar to the injected drug. By performing the quality control of the drug injection amount by using the average value and the standard deviation value in a predetermined sample number (for example, 30) of the measurement result, the quality control is performed at the same accuracy level as the 100% inspection.

10 Flame Retardant Wood 11 Plank Board 12 Outer Surface 13 Stacking Surface 14 Adhesive 15 Laminated Material 16 Temporary Lid Material 21 Injection Slit 22 Release Surface 23 Injection Opening 31 Incombustible Treatment Chemical A Sap Material B White Line Belt C Heartwood Aging Section D Heartwood unripe section

Claims (2)

In wood formed by laminating a plurality of planks and interposing them with an adhesive,
The grain board is composed of only sapwood of at least one of softwood and hardwood.
The grained plate has its longitudinal direction substantially coincident with the fiber direction,
Each of the grained plates has an injection slit on the overlapping surface,
The injection slit is provided so as to cross the fiber between the left and right side surfaces of the grain board,
By laminating one of the eye plate on the other of the eye plate, the release surface of the injection slit of the one eye plate is closed by the other eye plate,
The upper and lower outer surfaces of the wood are not provided with the injection slit,
The siding board has a non-combustible treatment agent that has moved along the fiber in the temporary conduit or the conduit from the injection slit,
In addition, the semi-incombustible or flame-retardant wood, wherein the incombustible treatment chemicals diffused from the upper and lower surfaces are present in the upper and lower surfaces of the wood. In a method of manufacturing a wood of a predetermined thickness by stacking a plurality of planks and laminating via an adhesive,
As the fibers of the grain board extend in the longitudinal direction of the grain board, only the sapwood of at least one of softwood and diffuse hole hardwood material, to produce the grain board,
On the overlapping surface of the grain plate, forming a slit for injection extending in the direction traversing the fiber between the left and right side surfaces of the grain plate,
In the plank plate which is the upper and lower outer surfaces of the wood, do not form an injection slit on the outer surface,
After adhering the overlapping faces of the grain board with each other with the adhesive, the non-combustible chemical is injected under reduced pressure and pressure,
While moving the non-combustible treatment agent along the fiber in the temporary conduit and the conduit from the injection slit,
The method for producing quasi-incombustible or flame-retardant wood, characterized in that the non-combustible treatment chemical is diffused from the outer surface to the upper and lower planks of the wood.

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