CN111993509A - Production process of melamine glue impregnated wood veneer - Google Patents
Production process of melamine glue impregnated wood veneer Download PDFInfo
- Publication number
- CN111993509A CN111993509A CN202010788702.6A CN202010788702A CN111993509A CN 111993509 A CN111993509 A CN 111993509A CN 202010788702 A CN202010788702 A CN 202010788702A CN 111993509 A CN111993509 A CN 111993509A
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- veneer
- glue
- spliced
- melamine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0207—Pretreatment of wood before impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a production process of melamine glue impregnated wood veneer, which comprises the following steps: A. cutting and trimming purchased veneers to obtain veneer raw materials; B. splicing and coiling the veneer raw materials to obtain spliced veneers; C. gum dipping treatment; performing gum dipping treatment on the spliced wood veneer twice to obtain melamine glue dipped wood veneer; the total gluing amount of the spliced veneer is 120-180% of the weight of the spliced veneer. According to the invention, the wood veneer is subjected to gum dipping treatment twice, and the melamine glue can be well attached to the surface of the wood veneer by controlling the glue component and the using amount in the gum dipping pool, the glue applying amount and the total glue applying amount each time and the drying process twice during each gum dipping, so that the cured wood veneer has good wear resistance, waterproof and flame retardant properties and a good pressing effect, and can meet the requirement of the subsequent pressing; and the glue cost can be reduced. The method has the characteristics of improving the production efficiency, improving the product quality and simplifying the subsequent pressing and pasting process.
Description
Technical Field
The invention relates to a wood veneer production process, in particular to a production process of melamine glue impregnated wood veneers.
Background
With the gradual decrease of forest resources and the sharp rise of the demand of boards, in order to meet the market demand, vinyl board is beginning to appear on the market, and in order to make the surface of the vinyl board have good aesthetic property, a layer of surface bonding material is generally adhered on the surface of the vinyl board, so that consumers can conveniently choose to purchase the vinyl board. The surface bonding material has three bonding modes of PVC color film, wear-resistant wood sheet and melamine impregnated paper at present. The wood sheet has strong texture and good visual aesthetic degree, but has poor wear resistance, and if the wear resistance is required to be improved, various paint processes are required, so that the process is complex, and the flame retardant property and the waterproof property are extremely poor. The melamine impregnated paper can achieve very strong wear resistance after being cured and molded, but the texture and the visual attractiveness are poor, and because the surfaces of base plates such as polyester plywood, vinyl material plates and the like are smooth, the traditional melamine impregnated paper cannot be directly molded with the vinyl material in a direct pressing and pasting mode, multiple processes are needed for secondary molding, and the production continuity and the mass production capacity are poor; in order to obtain a surface bonding material with strong texture, good visual aesthetics, good wear resistance, water resistance and flame resistance, researchers began to research to combine melamine glue and veneer together to obtain melamine glue impregnated veneer. However, the existing melamine impregnation process mainly aims at paper materials, and when the melamine impregnation process is used for impregnating wood veneers, on one hand, the wood veneers are independent and cannot be continuously impregnated, so that the production efficiency is extremely low; on the other hand, the quality of the finally obtained finished product of the melamine impregnated veneer is poor, and the wear resistance, the waterproof and flame retardant properties of the finished product cannot meet the use requirements; and when the melamine impregnated wood veneer is bonded with the vinyl material, the wood veneer needs to be pressed for many times, and cannot be formed at one time, so that the pressing process is troublesome. Therefore, the prior art has the problems of low production efficiency, poor product quality and more complex subsequent pressing and pasting process.
Disclosure of Invention
The invention aims to provide a production process of melamine glue impregnated wood veneer. The invention has the characteristics of improving the production efficiency, improving the product quality and simplifying the subsequent pressing and pasting process.
The technical scheme of the invention is as follows: a production process of melamine glue impregnated wood veneer comprises the following steps:
A. cutting and trimming purchased veneers to obtain veneer raw materials;
B. splicing and coiling the veneer raw materials to obtain spliced veneers;
C. gum dipping treatment; performing gum dipping treatment on the spliced wood veneer twice to obtain melamine glue dipped wood veneer; the total gluing amount of the spliced veneer is 120-180% of the weight of the spliced veneer.
In the production process of the melamine glue impregnated veneer, the length and the width of the veneer raw material are both larger than 1-2cm of the length and the width of the board to be adhered.
In the production process of the melamine impregnated wood veneer, the non-woven fabric adhesive tape or the back adhesive coated fabric is hot-pressed, cured and attached to the adjacent wood veneer by adopting the pressing and attaching equipment, the hot-pressing temperature is 150-170 ℃, and the hot-pressing time is 10-20 seconds.
In the production process of the melamine glue impregnated veneer, the width of the non-woven fabric adhesive tape or the back glue coated fabric is 1.5-2.5cm, and the length is 1.1-1.4 m.
In the production process of the melamine impregnated wood veneer, the impregnation treatment comprises the following specific steps: the spliced veneer is sequentially subjected to primary gum dipping, primary drying, secondary gum dipping and secondary drying under the traction of a traction device to finish gum dipping treatment;
in the production process of the melamine impregnated wood veneer, during one impregnation, the glue in the impregnation tank comprises E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
In the production process of the melamine impregnated veneer, the gluing amount of the spliced veneer in one impregnation is 55-65% of the total gluing amount.
In the production process of the melamine impregnated wood veneer, during primary drying, the spliced wood veneer sequentially passes through 3 sections of drying ovens, the temperature of the first section of drying oven is 75-85 ℃, the temperature of the second section of drying oven is 90-100 ℃, the temperature of the third section of drying oven is 105-115 ℃, and the air volume of each section of drying oven is 1800-2200m3/h。
In the production process of the melamine impregnated wood veneer, when the wood veneer is subjected to secondary impregnation, the glue in the impregnation tank is E0-grade melamine glue.
In the production process of the melamine glue impregnated veneer, during secondary drying, the spliced veneer sequentially passes through 5 sections of drying ovens with the temperature in step distribution, and the temperature of the drying ovens depends onThe second time is 125-135 deg.C, 155-165 deg.C, 145-155 deg.C, 165-175 deg.C, 135-145 deg.C; the air volume of each section of the drying oven is 1800-3/h。
Compared with the prior art, the wood veneer is cut, trimmed and spliced, so that the phenomenon that the wood veneer is suspended in tension and the wood veneer is broken due to uneven seams of the wood veneer caused by the length of equipment in the gum dipping process is prevented, the wood veneer can be continuously subjected to gum dipping treatment, and the gum dipping production efficiency can be effectively improved; in addition, by controlling the size of the materials used in the splicing treatment and the hot pressing process, the wood veneer splicing can be completed, the splicing fastness is ensured, the subsequent gum dipping treatment of the wood veneer is not influenced, and the full gum dipping of all positions of the wood veneer can be ensured. According to the invention, the wood veneer is subjected to gum dipping treatment twice, and the melamine glue can be well attached to the surface of the wood veneer by controlling the glue component and the using amount in the gum dipping pool, the glue applying amount and the total glue applying amount each time and the drying process twice during each gum dipping, so that the cured wood veneer has good wear resistance, waterproof and flame retardant properties and a good pressing effect, and can meet the requirement of the subsequent pressing; and the glue cost can be reduced. In conclusion, the invention has the characteristics of improving the production efficiency, improving the product quality and simplifying the subsequent pressing and pasting process.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1. A production process of melamine glue impregnated wood veneer comprises the following steps:
A. cutting and trimming purchased veneers to obtain veneer raw materials;
B. splicing and coiling the veneer raw materials to obtain spliced veneers;
C. gum dipping treatment; performing gum dipping treatment on the spliced wood veneer twice to obtain melamine glue dipped wood veneer; the total gluing amount of the spliced veneer is 120-180% of the weight of the spliced veneer.
The length and the width of the veneer raw material are both 1-2cm larger than the length and the width of the plate to be stuck.
And (3) hot-pressing and solidifying the non-woven fabric adhesive tape or the back adhesive coated fabric by adopting pressing equipment, and adhering the non-woven fabric adhesive tape or the back adhesive coated fabric to the adjacent wood veneer at the hot-pressing temperature of 150-170 ℃ for 10-20 seconds.
The width of the non-woven fabric adhesive tape or the back adhesive film-coated cloth is 1.5-2.5cm, and the length is 1.1-1.4 m.
The concrete process of the gum dipping treatment comprises the following steps: the spliced veneer is sequentially subjected to primary gum dipping, primary drying, secondary gum dipping and secondary drying under the traction of a traction device to finish gum dipping treatment;
during primary impregnation, the glue in the impregnation tank comprises E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
And during primary glue dipping, the glue coating comprises upper glue coating water and lower glue coating water, wherein the upper glue coating water and the lower glue coating water comprise E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
The gluing amount of the spliced veneer in one-time glue dipping is 55-65% of the total gluing amount.
When the primary drying is carried out, the spliced veneer sequentially passes through 3 sections of drying ovens, the temperature of the first section of drying oven is 75-85 ℃, the temperature of the second section of drying oven is 90-100 ℃, the temperature of the third section of drying oven is 105-115 ℃, and the air volume of each section of drying oven is 1800-2200m3/h。
And during secondary impregnation, the glue in the impregnation tank is E0-grade melamine glue.
During secondary drying, the spliced wood veneer sequentially passes through 5 sections of drying ovens with the temperature in stepped distribution, wherein the drying ovens are sequentially at 125-135 ℃, 155-165 ℃, 145-155 ℃, 165-175 ℃ and 135-145 ℃; the air volume of each section of the drying oven is 1800-3/h。
The length of the oven was 3.5 m.
The total air volume of the drying oven in the primary drying and the secondary drying is 15000-3/h。
Example 2. A production process of melamine glue impregnated wood veneer comprises the following steps:
A. cutting and trimming purchased veneers to obtain veneer raw materials;
B. splicing and coiling the veneer raw materials to obtain spliced veneers;
C. gum dipping treatment; performing gum dipping treatment on the spliced wood veneer twice to obtain melamine glue dipped wood veneer; the total gluing amount of the spliced veneer is 150% of the weight of the spliced veneer.
The length and the width of the veneer raw material are both 1-2cm larger than the length and the width of the plate to be stuck.
And (3) carrying out hot-pressing curing on the non-woven fabric adhesive tape or the back adhesive coated fabric by adopting pressing equipment, and attaching the non-woven fabric adhesive tape or the back adhesive coated fabric to the adjacent veneer, wherein the hot-pressing temperature is 160 ℃, and the hot-pressing time is 15 seconds.
The width of the non-woven fabric adhesive tape or the back adhesive coated fabric is 2cm, and the length of the non-woven fabric adhesive tape or the back adhesive coated fabric is 1.25 m.
The concrete process of the gum dipping treatment comprises the following steps: the spliced veneer is sequentially subjected to primary gum dipping, primary drying, secondary gum dipping and secondary drying under the traction of a traction device to finish gum dipping treatment;
during primary impregnation, the glue in the impregnation tank comprises E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
And during primary glue dipping, the glue coating comprises upper glue coating water and lower glue coating water, wherein the upper glue coating water and the lower glue coating water comprise E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
The gluing amount of the spliced veneer in one-time glue dipping is 60 percent of the total gluing amount.
During primary drying, the spliced veneer sequentially passes through 3 sections of drying ovens, the temperature of the first section of drying oven is 80 ℃, the temperature of the second section of drying oven is 95 ℃, the temperature of the third section of drying oven is 110 ℃, and the air volume of each section of drying oven is 2000m3/h。
And during secondary impregnation, the glue in the impregnation tank is E0-grade melamine glue.
During secondary drying, the spliced wood veneer sequentially passes through 5 sections of drying ovens with the temperature in stepped distribution, wherein the temperatures of the drying ovens are 130 ℃, 160 ℃, 150 ℃, 170 ℃ in sequence,140 ℃; the air quantity of each section of oven is 2000m3/h。
The length of the oven was 3.5 m.
The total air volume of the drying oven in the primary drying and the secondary drying is 18000m3/h。
The purchased veneers are 2.5 meters or 2.65 meters long and 1.26 meters or 1.3 meters wide, trimming is carried out on a board sawing machine firstly, the veneers are cut to be larger than the board in size of 1-2 centimeters (1.25 meters wide by 2.47 meters long) respectively, and the trimming of the scientific veneers or the solid wood veneers is mainly carried out for generating fracture due to hanging tension of the veneers and unevenness between seams of the veneers in the next impregnation process due to the length of equipment (the length of an oven of the impregnation equipment is about 45 meters).
The first impregnation is carried out through a traction roller, enters an impregnation pool for mixing melamine glue and urea-formaldehyde glue, fully soaks and absorbs the melamine glue and the urea-formaldehyde glue, extrudes redundant glue through a glue metering roller, and controls the glue feeding amount to be 60% of the total glue amount, wherein the proportion of the glue subjected to the first impregnation is 50% of E0-grade melamine glue and 50% of E0-grade urea-formaldehyde glue, and the proportion is the proportion with optimized cost and the optimal pressing effect; passing through a three-section drying oven of 3.5 meters, the first section temperature is 80 ℃, the second section temperature is 95 ℃, the third section temperature is 110 ℃, the air volume of each section of drying oven is about 2000 per hour, the veneer is in a semi-dry semi-cured state after passing through the first three-section drying oven, the veneer is continuously pulled into a secondary glue dipping pool, melamine glue of E0 grade with the glue amount being 40% of the total glue amount is applied through a glue metering roller, the first section drying oven passes through a five-section drying oven of 3.5 meters, the temperature of the first section drying oven is 130 ℃, the temperature of the second section drying oven is 160 ℃, the temperature of the third section drying oven is 150 ℃, the temperature of the fourth section drying oven is 170 ℃, the temperature of the fifth section drying oven is 140 ℃, the air volume of each section drying oven is about 2000 per hour, the total air volume of the eight sections of drying ovens is 15000-. The gluing amount is less than 120 percent, the surface of the pressing finished product is not wear-resistant due to insufficient curing, a surface curing glue film is not formed, the gluing amount is more than 180 percent, more energy consumption is needed in the pressing process, the surface is sticky, and the pressing finished product is regarded as a defective product.
Claims (10)
1. The production process of the melamine glue impregnated veneer is characterized by comprising the following steps:
A. cutting and trimming purchased veneers to obtain veneer raw materials;
B. splicing and coiling the veneer raw materials to obtain spliced veneers;
C. gum dipping treatment; performing gum dipping treatment on the spliced wood veneer twice to obtain melamine glue dipped wood veneer; the total gluing amount of the spliced veneer is 120-180% of the weight of the spliced veneer.
2. The production process of the melamine glue impregnated veneer according to claim 1, characterized in that: the length and the width of the veneer raw material are both 1-2cm larger than the length and the width of the plate to be stuck.
3. The production process of the melamine glue impregnated veneer according to claim 1, characterized in that: and (3) hot-pressing and solidifying the non-woven fabric adhesive tape or the back adhesive coated fabric by adopting pressing equipment, and adhering the non-woven fabric adhesive tape or the back adhesive coated fabric to the adjacent wood veneer at the hot-pressing temperature of 150-170 ℃ for 10-20 seconds.
4. The production process of the melamine glue impregnated veneer according to claim 1, characterized in that: the width of the non-woven fabric adhesive tape or the back adhesive film-coated cloth is 1.5-2.5cm, and the length is 1.1-1.4 m.
5. The production process of the melamine glue impregnated veneer according to claim 1, characterized in that: the concrete process of the gum dipping treatment comprises the following steps: and the spliced veneer is sequentially subjected to primary impregnation, primary drying, secondary impregnation and secondary drying under the traction of a traction device to finish impregnation treatment.
6. The production process of the melamine glue impregnated veneer according to claim 5, characterized in that: during primary impregnation, the glue in the impregnation tank comprises E0-grade melamine glue and E0-grade urea formaldehyde glue, and the mixing ratio of the E0-grade melamine glue to the E0-grade urea formaldehyde glue is 1: 1.
7. The production process of the melamine glue impregnated veneer according to claim 5, characterized in that: the gluing amount of the spliced veneer in one-time glue dipping is 55-65% of the total gluing amount.
8. The production process of the melamine glue impregnated veneer according to claim 5, characterized in that: when the primary drying is carried out, the spliced veneer sequentially passes through 3 sections of drying ovens, the temperature of the first section of drying oven is 75-85 ℃, the temperature of the second section of drying oven is 90-100 ℃, the temperature of the third section of drying oven is 105-115 ℃, and the air volume of each section of drying oven is 1800-2200m3/h。
9. The production process of the melamine glue impregnated veneer according to claim 5, characterized in that: and during secondary impregnation, the glue in the impregnation tank is E0-grade melamine glue.
10. The production process of the melamine glue impregnated veneer according to claim 5, characterized in that: during secondary drying, the spliced wood veneer sequentially passes through 5 sections of drying ovens with the temperature in stepped distribution, wherein the drying ovens are sequentially at 125-135 ℃, 155-165 ℃, 145-155 ℃, 165-175 ℃ and 135-145 ℃; the air volume of each section of the drying oven is 1800-3/h。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010788702.6A CN111993509B (en) | 2020-08-07 | 2020-08-07 | Production process of melamine glue impregnated wood veneer |
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| CN202010788702.6A CN111993509B (en) | 2020-08-07 | 2020-08-07 | Production process of melamine glue impregnated wood veneer |
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| CN111993509A true CN111993509A (en) | 2020-11-27 |
| CN111993509B CN111993509B (en) | 2022-03-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115256581A (en) * | 2022-08-22 | 2022-11-01 | 荣森(北京)科技有限公司 | Water-based melamine resin veneer |
| CN115256582A (en) * | 2022-08-22 | 2022-11-01 | 荣森(北京)科技有限公司 | Water-based melamine resin wood board |
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| US20100015389A1 (en) * | 2008-07-17 | 2010-01-21 | Alberta Research Council Inc. | Container flooring material and method of manufacture |
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| CN209011470U (en) * | 2018-03-29 | 2019-06-21 | 苏州大学 | Light-transmitting wood veneer and wall decoration |
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| CN1730292A (en) * | 2005-08-11 | 2006-02-08 | 张青云 | Solid elastomer coating-free veneer overlay technique |
| CN2825245Y (en) * | 2005-08-11 | 2006-10-11 | 张青云 | Panel with thin-board decorative surface |
| US20100015389A1 (en) * | 2008-07-17 | 2010-01-21 | Alberta Research Council Inc. | Container flooring material and method of manufacture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115256581A (en) * | 2022-08-22 | 2022-11-01 | 荣森(北京)科技有限公司 | Water-based melamine resin veneer |
| CN115256582A (en) * | 2022-08-22 | 2022-11-01 | 荣森(北京)科技有限公司 | Water-based melamine resin wood board |
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| CN111993509B (en) | 2022-03-11 |
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