Process for producing fragrance-releasing shaving board by using agarwood extraction residue

Abstract

The application discloses a process for producing a fragrance-releasing shaving board by using agarwood extraction residues, and comprises the following steps: crushing the agarwood residues, naturally air-drying, and obtaining initial raw materials; taking the initial raw materials that cannot pass through a 20-mesh sieve as shaving board core layer raw materials, and taking the initial raw materials that can pass through a 20-mesh sieve as shaving board surface layer raw materials; uniformly spraying an adhesive into the shaving board core layer raw materials, uniformly stirring, and obtaining a mixture one; uniformly spraying the adhesive into the shaving board surface layer raw materials, uniformly stirring, and obtaining a mixture two; uniformly laying and pre-pressing the mixture two, the mixture one and the mixture two in sequence to obtain a pre-pressed board blank; hot-pressing the pre-pressed board blank by using a hot-pressing process; cooling and curing the hot-pressed board blank, and obtaining the fragrance-releasing shaving board. The process uses the agarwood residues as raw materials to prepare the long-lasting fragrance-releasing shaving board, and the prepared board has good physical and mechanical properties, thermal stability and long-lasting fragrance-releasing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of artificial shaving board, and particularly relates to a process for producing fragrance-releasing shaving board by using agarwood extraction residues. BACKGROUND

[0002] Shaving board is made of wood or other wood fiber materials, and is glued into artificial board under the action of heat and pressure after applying adhesive, also known as shaving board. Because it has the advantages of beautiful texture, comfortable touch, natural environment protection, easy processing and the like, it is widely used in furniture manufacturing and building industry and train and automobile carriage manufacturing.

[0003] With the improvement of people's living standards, not only is there a demand for formaldehyde release of shaving board, but there is also an urgent need for improving indoor environmental comfort, and for antibacterial, antiviral and fragrance-imparting functions of home products through specific means. At present, the mainstream fragrance-imparting shaving board products mainly use the method of surface coating of inorganic adjuvant to realize the function. This method has good effect, but the amount of functional adjuvant used is large, and it is sensitive to the environment and easy to change.

[0004] Therefore, some people have proposed a method of realizing the fragrance-releasing function by compounding shaving board products with plant source organic functional adjuvant, which mainly realizes the function by mixing the fragrance-releasing functional factor after emulsification or microcapsule coating with impregnated or glued resin. However, the fragrance-releasing components in the traditional plant source organic functional adjuvant are easy to volatilize, and the high pressure and high temperature conditions in the shaving board production process make the emulsion or microcapsule wall material distributed on the surface of the board structure collapse, resulting in instantaneous volatilization or dissociation of the fragrance-releasing factor, which is difficult to achieve the effect of persistent fragrance-releasing. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application aims to provide a process for producing fragrance-releasing shaving board by using agarwood extraction residues, which uses agarwood residues in agricultural and forestry waste as raw materials to prepare persistent fragrance-releasing shaving board, and the prepared board has good physical and mechanical properties, thermal stability and persistent fragrance-releasing performance.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] A process for producing fragrance-releasing shaving board by using agarwood extraction residues, which is characterized by comprising the following steps:

[0008] Step 1, grinding the agarwood residues after agarwood extraction, and naturally air-drying to obtain initial raw materials;

[0009] Step 2, using the initial raw materials that cannot pass through a 20-mesh sieve as shaving board core layer raw materials; using the initial raw materials that can pass through a 20-mesh sieve as shaving board surface layer raw materials;

[0010] Step 3, evenly spray the adhesive into the flakeboard core layer raw material at a glue application ratio of 2%-6% by mass percentage, and obtain mixture one after uniform stirring; evenly spray the adhesive into the flakeboard surface layer raw material at a glue application ratio of 2%-6% by mass percentage, and obtain mixture two after uniform stirring;

[0011] Step 4, sequentially and uniformly lay and pre-press into a board blank in the order of mixture two, mixture one, and mixture two;

[0012] Step 5, hot-press the board blank obtained after pre-pressing by using a hot-pressing process;

[0013] Step 6, cool and age the hot-pressed board blank to obtain the fragrance-releasing flakeboard with a thickness of 10-18 mm.

[0014] Further, the initial raw material in step 1 has a moisture content of 9%-12%.

[0015] Further, the agarwood residue is a residue after water vapor distillation and / or supercritical extraction of agarwood.

[0016] Further, the flakeboard core layer raw material is mixed from a water vapor distillation residue and a supercritical extraction residue, wherein the water vapor distillation residue accounts for 60%-100% of the flakeboard core layer raw material by mass fraction, and the supercritical extraction residue accounts for 0-40% of the flakeboard core layer raw material by mass fraction.

[0017] Further, the water vapor distillation residue accounts for 70%-80% of the flakeboard core layer raw material by mass fraction.

[0018] Further, the flakeboard surface layer raw material is entirely a water vapor distillation residue.

[0019] Further, the pressure in the pre-pressing process in step 4 is 0.5-2 MPa, and the pre-pressing time is 2-10 s.

[0020] Further, in step 5, in the hot-pressing process, the hot-pressing temperature is 160-200℃, the pressure is 0.7-3.0 MPa, and the time is 5 min.

[0021] The density of the pressing plate used is 850-950 g / cm 3 , and the thickness is 3-20 mm.

[0022] Further, in the fragrance-releasing flakeboard obtained in step 6, the surface layer thickness is 15%-20% of the total thickness, and the core layer thickness is 60%-70% of the total thickness.

[0023] Further, the adhesive is selected from diphenylmethane diisocyanate or a polymer thereof, a mixture of water-based polyurethane and diphenylmethane diisocyanate mixed in a mass ratio of 1:1 to 3:1, or a mixture of ethylene-vinyl acetate copolymer and diphenylmethane diisocyanate mixed in a mass ratio of 8:1 to 12:1.

[0024] The significant effect of the present application is that the present application produces a long-lasting fragrance type shaving board by using the Aquilaria extract residue in the agricultural and forestry waste as a raw material, and tests the physical and mechanical properties, thermal stability and fragrance releasing performance of the produced shaving board. The test results show that the Aquilaria extract residue is suitable as a raw material for producing shaving board, and the MOR / MOE value of the prepared shaving board reaches 20.11 MPa / 2.5 GPa; which is much higher than the minimum requirement of furniture type shaving board (P2 type) in dry state in Chinese national standard GB / T4897-2015; at the same time, the shaving board can release rich fragrance when heated to 50-75 DEG C, and the slow fragrance releasing time at room temperature is more than 5 years. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a process flow chart of the present application. DETAILED DESCRIPTION

[0026] The specific embodiment and working principle of the present application will be further described in detail below in combination with the drawings. Example 1

[0027] As shown in Figure 1 , the present embodiment proposes a process for producing a fragrance type shaving board using Aquilaria extract residue, and the specific steps are as follows:

[0028] Step 1, the Aquilaria residue after extraction is crushed, and naturally air-dried to a moisture content of 9%, to obtain an initial raw material;

[0029] In this example, the Aquilaria residue is the residue after steam distillation and supercritical extraction of Aquilaria wood;

[0030] Step 2, the initial raw material that cannot pass through a 20-mesh sieve is used as the shaving board core layer raw material; the initial raw material that can pass through a 20-mesh sieve is used as the shaving board surface layer raw material;

[0031] The shaving board core layer raw material is mixed from the residue after steam distillation and the residue after supercritical extraction, wherein the residue after steam distillation accounts for 60% of the shaving board core layer raw material by mass fraction, and the residue after supercritical extraction accounts for 40% of the shaving board core layer raw material by mass fraction; all of the shaving board surface layer raw material is the residue after steam distillation;

[0032] Since the laggard after water vapor distillation contains more sesquiterpenes and volatile flavor factors than the laggard after supercritical extraction, the laggard after supercritical extraction is used as the core layer raw material of the particle board, and is placed in the sandwich of the surface layer raw material of the particle board which is all the laggard after water vapor distillation, so that the laggard after water vapor distillation is easier to release fragrance when heated, and the produced particle board has better fragrance releasing effect.

[0033] Step 3, diphenylmethane diisocyanate (MDI) or its polymer is used as the adhesive, the core layer raw material of the particle board is poured into the drum mixer, the adhesive is uniformly sprayed into the core layer raw material of the particle board at a sizing ratio of 2% by mass percentage by using a high-pressure spray gun, and mixture one is obtained after uniform stirring; the surface layer raw material of the particle board is poured into the drum mixer, the adhesive is uniformly sprayed into the surface layer raw material of the particle board at a sizing ratio of 3% by mass percentage by using a high-pressure spray gun, and mixture two is obtained after uniform stirring; the gluing degree is controlled according to the quality requirements of the board;

[0034] Step 4, the mixture two, the mixture one and the mixture two are sequentially and uniformly laid and pre-pressed into a board blank in this order, the pressure in the pre-pressing process is 0.5 MPa, and the pre-pressing time is 10 s;

[0035] Step 5, the board blank obtained after pre-pressing is hot-pressed into a shape by using a hot-pressing process; in the hot-pressing process, the hot-pressing temperature is 160℃, the pressure is 0.8 MPa, and the time is 5 min; the density of the pressing plate used is 850-950 g / cm 3 , and the thickness is 3-20 mm;

[0036] Step 6, the board blank after hot-pressing is cooled and aged to obtain the fragrance-releasing particle board, and the thickness of the fragrance-releasing particle board is 10 mm, wherein the thickness of the surface layer is 15% of the total thickness, and the thickness of the core layer is 70% of the total thickness. Example 2

[0037] The difference between this embodiment and example 1 is that:

[0038] In step 1, the eaglewood laggard is naturally air-dried to a moisture content of 10%;

[0039] In step 2, the water vapor distillation laggard accounts for 70% of the core layer raw material of the particle board by mass fraction, and the supercritical extraction laggard accounts for 30% of the core layer raw material of the particle board by mass fraction;

[0040] In step 3, the adhesive is a mixture of water-based polyurethane and diphenylmethane diisocyanate, which is mixed in a mass ratio of 1:1; the sizing ratio of the core layer raw material of the particle board is 3% by mass percentage; and the sizing ratio of the surface layer raw material of the particle board is 4% by mass percentage;

[0041] In step 4, the pressure of the pre-pressing process is 1 MPa, and the pre-pressing time is 8 s;

[0042] In step 5, the hot-pressing temperature is 170℃, and the pressure is 1 Mpa;

[0043] In step 6, the thickness of the fragrance-releasing particle board is 11 mm, wherein the thickness of the surface layer is 16% of the total thickness, and the thickness of the core layer is 68% of the total thickness. Example 3

[0044] The difference between this embodiment and Example 1 is that:

[0045] In step 1, the agarwood residue is naturally air-dried to a moisture content of 11%;

[0046] In step 2, the water vapor distillation residue accounts for 75% of the particle board core layer raw material by mass fraction, and the supercritical extraction residue accounts for 25% of the particle board core layer raw material by mass fraction;

[0047] In step 3, the adhesive is a mixture of water-based polyurethane and diphenyl methane diisocyanate, mixed in a mass ratio of 3:1; the gluing ratio of the particle board core layer raw material is 4% by mass fraction; and the gluing ratio of the particle board surface layer raw material is 5% by mass fraction;

[0048] In step 4, the pressure of the pre-pressing process is 1.5 MPa, and the pre-pressing time is 6 s;

[0049] In step 5, the hot-pressing temperature is 180℃, and the pressure is 1.5 Mpa;

[0050] In step 6, the thickness of the fragrance-releasing particle board is 13 mm, wherein the thickness of the surface layer is 17% of the total thickness, and the thickness of the core layer is 66% of the total thickness. Example 4

[0051] The difference between this embodiment and Example 1 is that:

[0052] In step 1, the agarwood residue is naturally air-dried to a moisture content of 12%;

[0053] In step 2, the water vapor distillation residue accounts for 80% of the particle board core layer raw material by mass fraction, and the supercritical extraction residue accounts for 20% of the particle board core layer raw material by mass fraction;

[0054] In step 3, the adhesive is a mixture of ethylene-vinyl acetate copolymer and diphenyl methane diisocyanate, mixed in a mass ratio of 8:1; the gluing ratio of the particle board core layer raw material is 5% by mass fraction; and the gluing ratio of the particle board surface layer raw material is 6% by mass fraction;

[0055] In step 4, the pressure of the pre-pressing process is 2 MPa, and the pre-pressing time is 2 s;

[0056] In step 5, the hot-pressing temperature is 180℃, and the pressure is 2 MPa;

[0057] In step 6, the thickness of the fragrance-releasing particle board is 15 mm, wherein the thickness of the surface layer is 18% of the total thickness, and the thickness of the core layer is 64% of the total thickness. Example 5

[0058] The difference between this embodiment and Example 1 is that:

[0059] In step 1, the agarwood residue is naturally air-dried to a moisture content of 10%;

[0060] In step 2, the water vapor distillation residue accounts for 90% of the particle board core layer raw material by mass fraction, and the supercritical extraction residue accounts for 10% of the particle board core layer raw material by mass fraction;

[0061] In step 3, the adhesive is a mixture of ethylene-vinyl acetate copolymer and diphenyl methane diisocyanate, mixed in a mass ratio of 12:1; the sizing ratio of the particle board core layer raw material is 6% by mass fraction; and the sizing ratio of the particle board surface layer raw material is 6% by mass fraction;

[0062] In step 4, the pressure of the pre-pressing process is 1.8 MPa, and the pre-pressing time is 4 s;

[0063] In step 5, the hot-pressing temperature is 200℃, and the pressure is 2.5 MPa;

[0064] In step 6, the thickness of the fragrance-releasing particle board is 18 mm, wherein the thickness of the surface layer is 19% of the total thickness, and the thickness of the core layer is 62% of the total thickness. Example 6

[0065] The difference between this embodiment and Example 1 is that:

[0066] In step 1, the agarwood residue is naturally air-dried to a moisture content of 11%;

[0067] In step 2, the water vapor distillation residue accounts for 100% of the particle board core layer raw material by mass fraction, and there is no supercritical extraction residue;

[0068] In step 3, the adhesive is selected from a mixture of ethylene-vinyl acetate copolymer and diphenyl methane diisocyanate, and the two are mixed in a mass ratio of 10:1; the flakeboard core layer raw material is applied at a glue application ratio of 4% by mass percentage; the flakeboard surface layer raw material is applied at a glue application ratio of 4% by mass percentage;

[0069] In step 4, the pre-pressing process is performed at a pressure of 1.5 MPa for 5 s;

[0070] In step 5, the hot-pressing temperature is 190°C, and the pressure is 3 MPa;

[0071] In step 6, the thickness of the fragrance-releasing flakeboard is 16 mm, wherein the surface layer thickness is 20% of the total thickness, and the core layer thickness is 60% of the total thickness.

[0072] The physical and mechanical properties, thermal stability, and fragrance-releasing performance of the flakeboards obtained in each example were tested, wherein the mechanical test standards were: MOR of 22.5 MPa, MOE of 1.01 MPa, and 24h water absorption expansion rate of 2.34%. The test results showed that the agarwood extraction residue is suitable as a production raw material for flakeboards, and the MOR / MOE values of the prepared flakeboards reached 20.11 MPa / 2.5 GPa, wherein the MOR / MOE values of examples 3 and 4 were greater than those of the other examples; the MOR / MOE values of the flakeboards obtained in all examples were much higher than the minimum requirements for dry-state furniture-type flakeboards (P2 type) in the Chinese national standard GB / T4897-2015; at the same time, the flakeboards released a rich fragrance when heated to 50-75°C, and the slow-release fragrance time at room temperature was more than 5 years.

[0073] The technical solutions provided by the present application are described in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application. The above examples are only used to help understand the method and core idea of the present application. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A process for producing a fragrant shaving board using agarwood extraction residue, characterized by, It comprises the following steps: Step 1, pulverize the agarwood residue after extraction, and dry naturally to obtain the initial raw material; Step 2, use the initial raw material that cannot pass through a 20-mesh sieve as the core layer raw material of the particle board, and use the initial raw material that can pass through a 20-mesh sieve as the surface layer raw material of the particle board; Step 3, uniformly spray the adhesive into the core layer raw material of the particle board at a glue application ratio of 2%-6% by mass percentage, and uniformly stir to obtain mixture one, and uniformly spray the adhesive into the surface layer raw material of the particle board at a glue application ratio of 2%-6% by mass percentage, and uniformly stir to obtain mixture two; Step 4, uniformly lay and pre-press the mixture two, mixture one, and mixture two in sequence to obtain a board blank; Step 5, hot-press the board blank obtained after pre-pressing by using a hot-pressing process; Step 6, cool and age the board blank after hot-pressing to obtain the fragrance-releasing particle board; The core layer raw material of the particle board is mixed from the residue after water vapor distillation and the residue after supercritical extraction, wherein the residue after water vapor distillation accounts for 70%-80% of the core layer raw material of the particle board by mass fraction; The surface layer raw material of the particle board is all the residue after water vapor distillation.

2. The process for producing a fragrant shaving board using agarwood extraction residue according to claim 1, characterized by: The water content of the initial raw material in step 1 is 9%-12%.

3. The process for producing a fragrant shaving board using agarwood extraction residue according to claim 1, characterized in that: The pressure of the pre-pressing process in step 4 is 0.5-2 MPa, and the pre-pressing time is 2-10 s.

4. The process for producing a fragrant shaving board using agarwood extraction residue according to claim 1, characterized by: In the hot-pressing process in step 5, the hot-pressing temperature is 160-200℃, the pressure is 0.7-3.0 MPa, and the time is 5 min; The density of the pressboard is 850-950 g / cm 3 , thickness 3-20 mm.

5. The process for producing a fragrant shaving board using the residual extract of eaglewood according to claim 1, characterized in that: In the fragrance-releasing particle board obtained in step 6, the thickness of the surface layer is 15%-20% of the total thickness, and the thickness of the core layer is 60%-70% of the total thickness.

6. The process for producing a fragrant shaving board using the residual extract of eaglewood according to claim 1, characterized by: The adhesive is selected from diphenylmethane diisocyanate or its polymer, a mixture of water-based polyurethane and diphenylmethane diisocyanate at a mass ratio of 1:1-3:1, or a mixture of ethylene-vinyl acetate copolymer and diphenylmethane diisocyanate at a mass ratio of 8:1-12:1.

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