A manufacturing method of a bamboo decorative veneer

Abstract

The application discloses a manufacturing method of bamboo decorative veneer, which comprises the following steps: processing round bamboo with a water content of 60-120% into bamboo strips, processing the bamboo strips into standard bamboo strips, radially planing the standard bamboo strips along the thickness direction of the bamboo strips to obtain planed micro-thin bamboo units, realizing standardization of the processing units, and improving the utilization rate of bamboo; enhancing and toughening the planed micro-thin bamboo units to improve the transverse tensile strength and toughness of the bamboo units, and improve the product performance of the decorative veneer; using the planed micro-thin bamboo units after the enhancing and toughening treatment as raw materials, processing the planed micro-thin bamboo units into wide bamboo decorative veneer on a splicing device by using an adhesive, realizing large-scale processing of the planed micro-thin bamboo units by a transverse splicing mode, and facilitating the continuous and automatic production of the bamboo decorative veneer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bamboo wood-based panel processing, in particular to a manufacturing method of bamboo wood-based decorative veneer. BACKGROUND

[0002] Bamboo wood is a good decorative material for wood-based panel. Bamboo wood-based panel has simple and elegant national style, and is often used for decoration of indoor buildings and furniture. For example, bamboo veneer as a decorative material maintains the unique texture of bamboo wood, and has fresh and natural, real and elegant texture. It can partially replace precious thin wood as a decorative material for wood-based panel and furniture to make up for the shortage of precious thin wood resources, and also meets the desire of people to return to nature.

[0003] At present, bamboo wood-based decorative veneer is mainly manufactured by sawing or planing. For example, reconstituted bamboo square material is sawed to obtain decorative veneer with a thickness of more than 1 mm. After softening treatment, bamboo integrated square material is planed to obtain planed bamboo veneer with a thickness of less than 1 mm as a decorative material.

[0004] From the current manufacturing process of bamboo wood-based decorative veneer, reconstituted bamboo decorative veneer manufactured by sawing mainly uses reconstituted bamboo manufactured by cold pressing and hot curing. The density of the reconstituted bamboo is high (1 g / cm 3 The above production process is complex, the production efficiency is not high, and the sawing process has a large sawing loss, resulting in low material utilization. The planed bamboo veneer production process mainly includes: raw bamboo-crossing-longitudinal sawing-coarse planing-steaming, bleaching and three-step treatment-drying-fine planing-slice selection-sanding-fine selection-gluing and aging-billet assembly-side pressing and gluing curing-radial integrated bamboo block-mechanical processing or gluing and widening-narrow or wide radial integrated bamboo block-sanding-gluing-laminated assembly-laminated gluing-bamboo integrated material (bamboo square)-softening-planing-bamboo veneer-drying-edge cutting-finished product. The manufacturing process is complex, which affects the production efficiency and production cost of planed bamboo veneer. It is urgent to improve the product quality and reduce the production cost by improving the process. SUMMARY

[0005] In view of this, the purpose of the embodiments of the present application is to provide a manufacturing method of bamboo wood-based decorative veneer to solve the problems in the background art.

[0006] The technical scheme provided by the embodiments of the present application is as follows: a manufacturing method of bamboo wood-based decorative veneer, comprising:

[0007] The round bamboo with a moisture content of 60% to 120% is flaked into bamboo strips, and the bamboo strips are processed into specification bamboo strips through coarse planing, bleaching and steaming, and fine planing processes, and then the specification bamboo strips are radially planed along the thickness direction of the bamboo strips to obtain planed bamboo veneer units.

[0008] The sliced micro-thin bamboo unit is subjected to reinforcing and toughening treatment.

[0009] The sliced micro-thin bamboo unit subjected to reinforcing and toughening treatment is used as raw material, and a long and narrow sliced micro-thin bamboo unit is processed into a wide bamboo decorative veneer on a splicing device by using an adhesive.

[0010] The long and narrow sliced micro-thin bamboo is obtained by slicing a bamboo strip along the radial direction of the bamboo strip with high water content. Compared with the existing sliced thin bamboo processing method in the market, the sliced micro-thin bamboo is directly obtained by slicing the bamboo strip, while the conventional sliced thin bamboo is obtained by gluing the bamboo strip into a large-size bamboo square, and then softening and slicing.

[0011] The sliced micro-thin bamboo unit is subjected to reinforcing and toughening treatment by impregnation, so as to enhance the transverse tensile strength and toughness of the micro-thin bamboo unit, and prevent longitudinal cracking of the sliced micro-thin bamboo unit in the later processing.

[0012] The sliced micro-thin bamboo unit subjected to reinforcing and toughening treatment is used as raw material, and a long and narrow sliced micro-thin bamboo unit is processed into a wide bamboo decorative veneer by transverse splicing.

[0013] Optionally, the round bamboo species is Phyllostachys pubescens or Phyllostachys nidularis.

[0014] Optionally, the length of the bamboo strip is 2000-3000 mm, the width is 10-60 mm, and the thickness is 5-20 mm.

[0015] Optionally, the length of the sliced micro-thin bamboo unit is 2000-3000 mm, the width is 5-20 mm, and the thickness is 0.05-1.0 mm.

[0016] Optionally, the sliced micro-thin bamboo unit is subjected to reinforcing and toughening treatment, which comprises:

[0017] The sliced micro-thin bamboo unit is subjected to reinforcing and toughening treatment, which comprises:

[0018] The sliced micro-thin bamboo unit is soaked in the reinforcing and toughening agent, the mass fraction of the reinforcing and toughening agent is 1%-5%, the sliced micro-thin bamboo unit is subjected to reinforcing and toughening treatment by normal pressure or pressurized impregnation, the treatment time is 30 min-48 h, and the sliced micro-thin bamboo unit is subjected to drying treatment after the treatment.

[0019] Optionally, the reinforcing and toughening agent is selected from one or more of nanocellulose, 1-ethyl-3-methylimidazole acetate, hydroxyethyl methacrylate, and tetrahydrofurfuryl methacrylate in any ratio.

[0020] Optionally, the drying temperature is 50-70 DEG C, the drying time is 30s-5min, and the moisture content of the planed micro-thin bamboo unit after drying is 8-15%.

[0021] Optionally, the size of the processed decorative veneer is 2000-3000mm in length, 500-3000mm in width, and 0.05-1.0mm in thickness.

[0022] Optionally, the adhesive is a PUR hot melt adhesive or a polyurethane adhesive.

[0023] The technical scheme provided by the embodiment of the application can have the following beneficial effects:

[0024] As can be seen from the above embodiment, the application changes the traditional processing method of planed thin bamboo decorative veneer, realizes the standardization of the processing unit by radial planing of the bamboo raw material, and improves the utilization rate of bamboo; the bamboo unit is subjected to the reinforcing and toughening treatment, the transverse tensile strength and toughness of the bamboo unit are improved, and the product performance of the decorative veneer is improved; the large-format processing of the planed micro-thin bamboo unit is realized by the transverse splicing method, which is conducive to realizing the continuous and automatic production of the bamboo decorative veneer.

[0025] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. DETAILED DESCRIPTION

[0026] The method of the application will be described in detail below by way of examples.

[0027] Example 1:

[0028] The embodiment of the application provides a manufacturing method of a bamboo decorative veneer, mainly comprising the following specific steps:

[0029] 1) Radial planing of micro-thin bamboo unit from bamboo raw material

[0030] The new felled round bamboo of Phyllostachys edulis is used as raw material, the moisture content is 60%, the round bamboo is flaked into bamboo strips, and the bamboo strips are processed into bamboo strips with a length of 2000mm, a width of 10mm and a thickness of 5mm through rough planing, bleaching and cooking, and fine planing. The bamboo strips are subjected to radial planing along the thickness direction under non-drying conditions, and a planed micro-thin bamboo unit with a thickness of about 0.05mm, a width of 5mm and a length of 2000mm is obtained.

[0031] 2) Reinforcing and toughening treatment of the planed micro-thin bamboo unit

[0032] The sliced micro-thin bamboo skin obtained by slicing processing is soaked in a 1% by mass nanocellulose solution, and the sliced micro-thin bamboo skin is subjected to reinforcing and toughening treatment for 24 hours by means of normal pressure impregnation. After the treatment, the sliced micro-thin bamboo skin is subjected to drying treatment, the drying temperature is 50°C, and the drying time is 30 seconds. After drying, the moisture content of the bamboo skin is 12%.

[0033] 3) Processing of novel bamboo decorative veneer

[0034] The sliced micro-thin bamboo unit after reinforcing and toughening treatment is used as raw material, and a long and narrow standardized bamboo skin unit is processed into a wide bamboo decorative veneer on a splicing equipment by using a polyurethane adhesive. After processing, the size of the decorative veneer is 2000 mm in length, 500 mm in width, and 0.05 mm in thickness.

[0035] Example 2:

[0036] The embodiment of the present application provides a manufacturing method of bamboo decorative veneer, which mainly comprises the following specific steps:

[0037] 1) Radial slicing of bamboo raw material to obtain micro-thin bamboo unit

[0038] A newly-harvested round bamboo of Phyllostachys edulis is used as raw material, and the moisture content is 120%. The round bamboo is processed into bamboo strips through debarking, bleaching and steaming, and precise planing, to obtain bamboo strips with a length of 3000 mm, a width of 30 mm, and a thickness of 20 mm. The bamboo strips are subjected to radial slicing along the thickness direction under non-drying conditions, to obtain sliced micro-thin bamboo units with a thickness of about 1.0 mm, a width of 20 mm, and a length of 3000 mm.

[0039] 2) Reinforcing and toughening treatment of sliced micro-thin bamboo unit

[0040] The sliced micro-thin bamboo skin obtained by slicing processing is soaked in a 5% by mass 1-ethyl-3-methylimidazole acetate solution, and the sliced micro-thin bamboo skin is subjected to reinforcing and toughening treatment for 30 minutes by means of pressure impregnation. After the treatment, the sliced micro-thin bamboo skin is subjected to drying treatment, the drying temperature is 70°C, and the drying time is 3 minutes. After drying, the moisture content of the bamboo skin is 8%.

[0041] 3) Processing of novel bamboo decorative veneer

[0042] The sliced micro-thin bamboo unit after reinforcing and toughening treatment is used as raw material, and a long and narrow standardized bamboo skin unit is processed into a wide bamboo decorative veneer on a splicing equipment by using a polyurethane adhesive. After processing, the size of the decorative veneer is 2000 mm in length, 500 mm in width, and 0.05 mm in thickness.

[0043] Example 3:

[0044] The embodiment of the present application provides a manufacturing method of a bamboo decorative veneer, mainly comprising the following specific steps:

[0045] 1) Radial planing of raw bamboo to obtain thin bamboo units

[0046] Take newly-cut round bamboo of Phyllostachys pubescens as raw material with a water content of 100%; slice the round bamboo into bamboo strips, and process the bamboo strips into bamboo strips with a length of 2500 mm, a width of 40 mm and a thickness of 10 mm through rough planing, bleaching and cooking and fine planing; under the condition of no drying, perform radial planing along the thickness direction of the bamboo strips to obtain planed thin bamboo units with a thickness of 0.50 mm, a width of 10 mm and a length of 2500 mm.

[0047] 2) Reinforcement and toughening treatment of the planed thin bamboo units

[0048] Soak the planed thin bamboo skin obtained through planing into a mixed solution of 3% hydroxyethyl methacrylate and tetrahydrofurfuryl methacrylate by weight, and perform reinforcement and toughening treatment on the planed thin bamboo skin for 2 hours through pressurized impregnation. After the treatment, dry the planed thin bamboo skin at a temperature of 60 DEG C for 5 minutes. After drying, the water content of the bamboo skin is 10%.

[0049] 3) Processing of the new bamboo decorative veneer

[0050] Use polyurethane adhesive to process the long and narrow planed thin bamboo skin units into a wide bamboo decorative veneer on a splicing device, and the size of the processed bamboo decorative veneer is 2500 mm in length, 2400 mm in width and 0.5 mm in thickness.

[0051] Embodiment 4

[0052] The embodiment of the present application provides a manufacturing method of a bamboo decorative veneer, mainly comprising the following specific steps:

[0053] 1) Radial planing of raw bamboo to obtain thin bamboo units

[0054] Take newly-cut round bamboo of Phyllostachys pubescens as raw material with a water content of 80%; slice the round bamboo into bamboo strips, and process the bamboo strips into bamboo strips with a length of 2400 mm, a width of 60 mm and a thickness of 5 mm through rough planing, bleaching and cooking and fine planing; under the condition of no drying, perform radial planing along the thickness direction of the bamboo strips to obtain planed thin bamboo units with a thickness of 0.3 mm, a width of 5 mm and a length of 2400 mm.

[0055] 2) Reinforcement and toughening treatment of the planed thin bamboo units

[0056] The sliced micro-thin bamboo skin obtained by slicing processing is soaked in a mixed solution of 4% by mass of nanocellulose and 1-ethyl-3-methylimidazole acetate for 48 hours by normal pressure impregnation to enhance and toughen the sliced micro-thin bamboo skin. After the treatment, the sliced micro-thin bamboo skin is dried at a temperature of 70°C for 2 minutes. The moisture content of the dried bamboo skin is 15%.

[0057] 3) Processing of novel bamboo decorative veneer

[0058] The sliced micro-thin bamboo unit after the enhancement and toughening treatment is used as raw material, and a polyurethane adhesive is used to process the narrow and long standardized bamboo skin unit into a wide bamboo decorative veneer on a splicing equipment. The size of the processed decorative veneer is 2400 mm in length, 2500 mm in width, and 0.3 mm in thickness.

[0059] Comparative example:

[0060] 1) Bamboo strip processing

[0061] Newly-harvested round bamboo is used as raw material, and the moisture content is 80%. The round bamboo is flaked into bamboo strips, and the bamboo strips are processed into strips with a length of 2500 mm, a width of 30 mm, and a thickness of 10 mm through rough planing and bleaching and cooking processes. The bamboo strips are dried at 80°C for 6 hours, and the moisture content of the bamboo strips is 12%. After fine planing, strips with a thickness of 9 mm, a width of 28 mm, and a length of 2500 mm are obtained.

[0062] 2) Bamboo board processing

[0063] The dried bamboo strips are coated with urea-formaldehyde resin adhesive, and the double-sided adhesive amount is 200 g / m 2 . The bamboo strips are processed into side-pressed bamboo boards under the conditions of a pressing plate temperature of 120°C, a unit pressure of 1.0 MPa, and a hot pressing time of 1 min / mm. The side-pressed bamboo boards are laminated in the thickness direction to obtain bamboo boards with a length of 2500 mm, a width of 800 mm, and a thickness of 800 mm.

[0064] 3) Sliced thin bamboo processing

[0065] The bamboo boards are used as raw material, and are softened in hot water at 60°C for 48 hours. The bamboo boards are sliced into sliced thin bamboo by a planer, and the size of the sliced thin bamboo is 2500 mm in length, 800 mm in width, and 0.75 mm in thickness. The sliced thin bamboo is dried at a temperature of 70°C for 30 minutes, and the moisture content is 10%.

[0066] The new type of bamboo decorative veneer manufactured by the above-mentioned embodiment of the present application and the sliced thin bamboo described in the comparative example are compared in terms of processing technology, material utilization rate, manufacturing cost and product quality. The method described in the present application has the characteristics of simple process, high material utilization rate, low manufacturing cost and good product quality (such as high transverse tensile strength). The comparison is shown in the following table.

[0067]

[0068] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

Claims

1. A method for manufacturing a bamboo decorative veneer, characterized by comprising the steps of: The application relates to a bamboo strip processing method and a bamboo decorative veneer. ​ The bamboo strip processing method comprises the following steps: processing round bamboo with a moisture content of 60%-120% into bamboo strips, processing the bamboo strips into standard bamboo strips through rough planing, bleaching and steaming, and precise planing, processing the standard bamboo strips into bamboo strip units along the radial direction of the thickness of the bamboo strips, and the length of the bamboo strip units is 2000-3000 mm, the width is 5-20 mm, and the thickness is 0.05-1.0 mm; The bamboo strip units are subjected to reinforcing and toughening treatment, and the treatment specifically comprises the following steps: soaking the bamboo strip units in a reinforcing and toughening agent, the mass fraction of the reinforcing and toughening agent is 1%-5%, the bamboo strip units are subjected to reinforcing and toughening treatment through normal pressure and pressurized impregnation, the treatment time is 30 min-48 h, and the bamboo strip units are subjected to drying treatment after the treatment is completed; the reinforcing and toughening agent is selected from one or more of 1-ethyl-3-methyl imidazole acetate, hydroxyethyl methacrylate and tetrahydrofurfuryl methacrylate in an arbitrary ratio; The bamboo strip units subjected to reinforcing and toughening treatment are used as raw materials, and a glue is used to process the long and narrow bamboo strip units into wide bamboo decorative veneers on a splicing device.

2. The manufacturing method of the bamboo decorative veneer according to claim 1, characterized in that, The round bamboo is Phyllostachys pubescens or Phyllostachys nidularis.

3. The manufacturing method of the bamboo decorative veneer according to claim 1, characterized in that, The length of the standard bamboo strip is 2000-3000 mm, the width is 10-60 mm, and the thickness is 5-20 mm.

4. The manufacturing method of the bamboo decorative veneer according to claim 1, characterized in that, The drying temperature is 50-70 DEG C, the drying time is 30 s-5 min, and the moisture content of the bamboo strip units after drying is 8%-15%.

5. The manufacturing method of the bamboo decorative veneer according to claim 1, characterized in that, The size of the processed decorative veneer is 2000-3000 mm in length, 500-3000 mm in width and 0.05-1.0 mm in thickness.

6. The manufacturing method of the bamboo decorative veneer according to claim 1, characterized in that, The glue is PUR hot melt glue or polyurethane adhesive.

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