CN112621925A - PP film faced decorative high-performance board and production process thereof - Google Patents
PP film faced decorative high-performance board and production process thereof Download PDFInfo
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- CN112621925A CN112621925A CN202011497323.8A CN202011497323A CN112621925A CN 112621925 A CN112621925 A CN 112621925A CN 202011497323 A CN202011497323 A CN 202011497323A CN 112621925 A CN112621925 A CN 112621925A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/914—Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
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Abstract
The invention discloses a production process of a PP film veneered decorative high-performance board, which comprises the steps of uniformly coating formaldehyde-free glue on the front side and the back side of a base material, laying a PP film, placing the PP film formaldehyde-free board in a cold press for prepressing, carrying out hot pressing on a board, and carrying out edge sawing treatment on the board to obtain the PP film veneered decorative high-performance board. The viscosity of the formaldehyde-free glue prepared by the invention is obviously higher than that of the formaldehyde-free glue prepared by the prior art, and the production and application requirements of PP film veneered decorative high-performance boards can be met.
Description
Technical Field
The invention belongs to the technical field of plate processing, and particularly relates to a PP film veneered decorative high-performance plate and a production process thereof.
Background
The adhesive industry is one of the fine chemical industries which develop rapidly in the world, is more and more concerned by all countries in the world along with the development of economy and the enhancement of environmental protection consciousness of people, is used as a multi-industry common product and technology, has brand new social requirements on adhesive performances such as non-toxicity, harmlessness, environmental friendliness, degradability and the like, obtains various green adhesive products and technologies which have high environmental compatibility, low manufacturing cost, economy and practicability by taking natural biomass materials as raw materials, and becomes a research hotspot in the field of current adhesives.
Most of adhesives for wood bonding contain formaldehyde, and wood products containing formaldehyde can cause serious influence on human health; the biomass adhesive without formaldehyde is an important research direction.
Chinese patent application document "a formaldehyde-free adhesive for artificial boards and a preparation method thereof (application publication No. CN 111303798A)" discloses a formaldehyde-free adhesive for artificial boards and a preparation method thereof. The formaldehyde-free adhesive for the artificial board comprises the main raw materials of biomass gum, sodium borate, ethylene glycol, polyvinyl alcohol, urea, glycerol and water, wherein the biomass gum comprises locust bean gum, tara gum and tamarind gum, and the weight ratio of the locust bean gum to the tara gum is 7-9: 3-5: 1-3. According to the formaldehyde-free adhesive for the artificial board and the preparation method thereof, formaldehyde is not doped, the activity of the locust bean gum and the tamarind gum is enhanced after the locust bean gum and the tamarind gum are puffed, the texture is more delicate, the uniform and non-dispersion of the locust bean gum and the tamarind gum are facilitated, the exquisite uniformity of the gum is enhanced, the Caesalpinia spinosa gum, the sodium borate, the ethylene glycol, the polyvinyl alcohol, the urea, the glycerol and the water are mixed and then atomized and sprayed into the homogeneous gum solution containing the locust bean gum and the tamarind gum in a stirring state at 85-90 ℃, the full mixing and the rapid and uniform distribution among all substances are facilitated. But the viscosity is poor, and the application requirement can not be met.
Disclosure of Invention
The invention provides a PP film veneered decorative high-performance board and a production process thereof, and aims to solve the problems that the formaldehyde-free glue prepared by the prior art has poor viscosity and cannot meet the production and application requirements of artificial boards.
In order to solve the technical problems, the invention adopts the following technical scheme:
a production process of a PP film faced decorative high-performance board comprises the following steps:
(1) the prepared multilayer solid wood board base material is matched with aldehyde-free glue, and the aldehyde-free glue is uniformly coated on the front surface and the back surface of the base material after the base material is subjected to a double-shaft gluing machine;
the preparation method of the aldehyde-free glue comprises the following steps:
a. adding 40-60 parts by weight of polyether triol and 16-25 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1-1.5h at the temperature of 76-93 ℃ and the microwave power of 100-200W until the reaction is finished;
b. b, adding 12-20 parts of propyl formate and 30-50 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 2-3h at the temperature of 65-70 ℃ to obtain a reaction solution;
c. cooling the reaction liquid prepared in the step b to 43-48 ℃, and adding 9-17 parts of triisopropanolamine for neutralization to form salt;
d. adding 45-70 parts of water into the neutralized salt obtained in the step c at the rotating speed of 2000-3000r/min, and stirring and emulsifying for 20-30min to obtain an emulsion;
e. adding 15-22 parts of N, N-dimethylformamide into the emulsion prepared in the step d to carry out chain extension reaction for 40-60min to prepare a chain extension reactant;
f. adding 8-14 parts of n-butyl alcohol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.2-2h, so as to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) placing the laid PP film formaldehyde-free plate in a cold press for prepressing;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
Preferably, the glue coating amount of the non-formaldehyde glue in the step (1) is 136-148g/m3。
Preferably, the conditions of the polymerization reaction in step a: the reaction was carried out at a temperature of 87 ℃ and a microwave power of 160W for 1.3 h.
Preferably, the average efficiency of laying the PP film formaldehyde-free plate in the step (3) is 120 pieces/h.
Preferably, the pre-pressing pressure in the step (3) is 7-8 MPa.
Preferably, the pre-pressing is carried out for 48-56min under the pre-pressing pressure of 7-8 MPa.
Preferably, the hot-pressing pressure in the step (4) is 7-10 MPa.
Preferably, the hot pressing temperature is 90-108 ℃.
Preferably, the hot pressing is carried out at a hot pressing temperature of 90-108 ℃ for 46-62 min.
The invention has the following beneficial effects:
(1) according to the invention, polyether triol and tetramethyl glutaric acid are adopted for polymerization reaction, propyl formate and butanone are added for dilution reflux reaction after the reaction is completed, the prepared reaction solution is cooled, triisopropanolamine is added for neutralization and salification, water is added into the neutralization and salification for high-speed shearing emulsification, the neutralization and salification emulsification is fully dispersed, then N, N-dimethylformamide with extremely high activity is added for rapid promotion of chain extension reaction, and finally N-butanol is added for end capping reaction, the viscosity of the prepared formaldehyde-free adhesive is up to more than 48.1Pa & S, and is obviously higher than that of the formaldehyde-free adhesive prepared by the prior art and at least higher than 22.4%; the free formaldehyde of the non-formaldehyde glue prepared by the invention is 0g/kg, which is the same as the free formaldehyde of the non-formaldehyde glue prepared by the prior art, thus the technology of the invention has obvious progress and the product is environment-friendly.
(2) The surface bonding strength of the PP film veneered decorative high-performance board prepared by the invention is up to more than 2.4MPa, is obviously higher than that of the PP film veneered decorative board prepared by the prior art and is at least higher than 20.0 percent; the water content is equivalent to that of the prior art, which shows that the PP film veneering decorative board prepared by the formaldehyde-free glue has excellent performance and can meet the market application requirement.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
In an embodiment, the production process of the PP film faced decorative high performance board comprises the following steps:
(1) the prepared multilayer solid wood board base material is matched with aldehyde-free glue, and the aldehyde-free glue is uniformly coated on the front surface and the back surface of the base material after the base material passes through a double-shaft gluing machine, wherein the gluing amount is 136-148g/m3；
The preparation method of the aldehyde-free glue comprises the following steps:
a. adding 40-60 parts by weight of polyether triol and 16-25 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1-1.5h at the temperature of 76-93 ℃ and the microwave power of 100-200W until the reaction is finished;
b. b, adding 12-20 parts of propyl formate and 30-50 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 2-3h at the temperature of 65-70 ℃ to obtain a reaction solution;
c. cooling the reaction liquid prepared in the step b to 43-48 ℃, and adding 9-17 parts of triisopropanolamine for neutralization to form salt;
d. adding 45-70 parts of water into the neutralized salt obtained in the step c at the rotating speed of 2000-3000r/min, and stirring and emulsifying for 20-30min to obtain an emulsion;
e. adding 15-22 parts of N, N-dimethylformamide into the emulsion prepared in the step d to carry out chain extension reaction for 40-60min to prepare a chain extension reactant;
f. adding 8-14 parts of n-butyl alcohol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.2-2h, so as to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) the average efficiency is 120 pieces/h, every 60 pieces are used as a stacking, the laid PP film formaldehyde-free plate is placed in a cold press for prepressing, and the prepressing is carried out for 48-56min under the prepressing pressure of 7-8 MPa;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing, and the plate is hot pressed for 46-62min under the hot pressing pressure of 7-10MPa and the hot pressing temperature of 90-108 ℃;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
The following is a more specific example.
Example 1
A production process of a PP film faced decorative high-performance board comprises the following steps:
(1) the prepared multilayer solid wood board substrate is matched with aldehyde-free glue, and the aldehyde-free glue is uniformly coated on the front side and the back side of the substrate after passing through a double-shaft gluing machine, wherein the gluing amount is 138g/m3；
The preparation method of the aldehyde-free glue comprises the following steps:
a. adding 42 parts by weight of polyether triol and 17 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1.5h at the temperature of 80 ℃ and the microwave power of 100W until the reaction is finished;
b. c, adding 13 parts of propyl formate and 34 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 3 hours at the temperature of 65 ℃ to obtain a reaction solution;
c. b, cooling the reaction solution prepared in the step b to 44 ℃, and adding 10 parts of triisopropanolamine for neutralization to form salt;
d. c, adding 53 parts of water into the neutralized salt obtained in the step c at the rotating speed of 2000r/min, stirring and emulsifying for 30min to obtain an emulsion;
e. adding 16 parts of N, N-dimethylformamide into the emulsion prepared in the step d to carry out chain extension reaction for 58min to prepare a chain extension reactant;
f. adding 8 parts of n-butanol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.8 hours to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) the average efficiency is 120 pieces/h, every 60 pieces are used as a stacking, the laid PP film formaldehyde-free plate is placed in a cold press for prepressing, and the prepressing is carried out for 53min under the prepressing pressure of 7.2 MPa;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing, and the hot pressing is carried out for 60min under the hot pressing pressure of 7MPa and the hot pressing temperature of 94 ℃;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
Example 2
A production process of a PP film faced decorative high-performance board comprises the following steps:
(1) the prepared multilayer solid wood board substrate is matched with aldehyde-free glue, and the aldehyde-free glue is uniformly coated on the front side and the back side of the substrate after passing through a double-shaft gluing machine, wherein the gluing amount is 143g/m3；
The preparation method of the aldehyde-free glue comprises the following steps:
a. adding 52 parts by weight of polyether triol and 20 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1.3h at the temperature of 87 ℃ and the microwave power of 160W until the reaction is finished;
b. adding 18 parts of propyl formate and 40 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 2.6 hours at the temperature of 68 ℃ to obtain a reaction solution;
c. cooling the reaction solution prepared in the step b to 46 ℃, and adding 14 parts of triisopropanolamine for neutralization to form salt;
d. c, adding 60 parts of water into the neutralized salt obtained in the step c at the rotating speed of 3000r/min, stirring and emulsifying for 25min to obtain an emulsion;
e. d, adding 19 parts of N, N-dimethylformamide into the emulsion prepared in the step d to perform chain extension reaction for 53min to prepare a chain extension reactant;
f. adding 12 parts of n-butanol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.8 hours to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) the average efficiency is 120 pieces/h, every 60 pieces of PP films are used as a stack, the laid PP film formaldehyde-free plate is placed in a cold press for prepressing, and the prepressing is carried out for 54min under the prepressing pressure of 7.6 MPa;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing, and the hot pressing is carried out for 105min under the hot pressing pressure of 9MPa and the hot pressing temperature of 103 ℃;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
Example 3
A production process of a PP film faced decorative high-performance board comprises the following steps:
(1) preparing the prepared multilayer solid wood board base materialThe non-formaldehyde glue is used together, and after passing through a double-shaft laminator, the non-formaldehyde glue is uniformly coated on the front surface and the back surface of the base material, and the glue coating amount is 145g/m3；
The preparation method of the aldehyde-free glue comprises the following steps:
a. adding 57 parts by weight of polyether triol and 23 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1.2h at the temperature of 90 ℃ and the microwave power of 180W until the reaction is finished;
b. adding 18 parts of propyl formate and 48 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 2.8 hours at the temperature of 66 ℃ to obtain a reaction solution;
c. c, cooling the reaction liquid prepared in the step b to 48 ℃, and adding 16 parts of triisopropanolamine for neutralization to form salt;
d. c, adding 65 parts of water into the neutralized salt obtained in the step c at the rotation speed of 2800r/min, stirring and emulsifying for 23min to obtain an emulsion;
e. adding 20 parts of N, N-dimethylformamide into the emulsion prepared in the step d to carry out chain extension reaction for 53min to prepare a chain extension reactant;
f. adding 13 parts of n-butanol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.4 hours to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) the average efficiency is 120 pieces/h, every 60 pieces are used as a stacking, the laid PP film formaldehyde-free plate is placed in a cold press for prepressing, and the prepressing is carried out for 48min under the prepressing pressure of 8 MPa;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing, and the plate is hot pressed for 48min under the hot pressing pressure of 10MPa and the hot pressing temperature of 105 ℃;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
Comparative example 1
The production process of the PP film veneered decorative high-performance board is basically the same as that of the PP film veneered decorative high-performance board in the embodiment 2, except that water and N, N-dimethylformamide are not required in raw materials for preparing the formaldehyde-free glue.
Comparative example 2
The production process of the PP film veneered decorative high-performance board is basically the same as that of the PP film veneered decorative high-performance board in the example 2, except that the raw materials for preparing the formaldehyde-free glue are lack of water.
Comparative example 3
The production process of the PP film veneered decorative high-performance board is basically the same as that of the PP film veneered decorative high-performance board in the example 2, except that N, N-dimethylformamide is lacked in raw materials for preparing the formaldehyde-free glue.
Comparative example 4
The production process of the PP film veneered decorative high-performance board is basically the same as that of the PP film veneered decorative high-performance board in the embodiment 2, except that the formaldehyde-free adhesive is prepared by the process described in the specific embodiments 1-5 in the Chinese patent application document 'formaldehyde-free adhesive for artificial boards and the preparation method thereof (application publication No. CN 111303798A').
(I) detection of Formaldehyde-free glue Performance
The viscosities and free formaldehyde of the aldehyde-free glues obtained in examples 1 to 3 and comparative examples 1 to 4 were measured and the results are shown in the following table.
| Test group | Viscosity (Pa. S) | Free formaldehyde (g/kg) |
| Example 1 | 48.1 | 0 |
| Example 2 | 56.2 | 0 |
| Example 3 | 51.6 | 0 |
| Comparative example 1 | 21.7 | 0 |
| Comparative example 2 | 43.9 | 0 |
| Comparative example 3 | 38.4 | 0 |
| Comparative example 4 | 36.2-39.3 | 0 |
From the above table, it can be seen that: (1) as can be seen from the data of examples 1-3 and comparative example 4, the viscosities of the aldehyde-free glues obtained in examples 1-3 are significantly higher than the viscosity of the aldehyde-free glue obtained in comparative example 4 (prior art), at least higher than 22.4%; the free formaldehyde of the non-formaldehyde glues obtained in examples 1 to 3 were all 0g/kg, as compared to the free formaldehyde of the non-formaldehyde glue obtained in comparative example 4 (prior art), indicating that the technology of the present invention is significantly advanced and inventive.
(2) As can be seen from the data of example 2 and comparative examples 1-3, water, N-dimethylformamide, act synergistically in the preparation of the aldehyde-free glue, synergistically increasing the viscosity of the aldehyde-free glue because: and e, adding water into the neutralization salt obtained in the step d for high-speed shearing emulsification, fully dispersing the neutralization salt emulsification, and then adding N, N-dimethylformamide with extremely high activity in the step e for rapidly promoting and increasing the chain extension reaction, so that the viscosity of the finally obtained product is improved.
(II) PP film veneered decoration high-performance board performance detection
The physical and mechanical properties of the PP film veneered decorative boards prepared in examples 1-3 and comparative example 4 are tested according to the standard GB/T17657-1999 (test method for physical and chemical properties of artificial boards and veneered artificial boards), and the test results are shown in the following table.
| Test group | Water content (%) | Surface bonding Strength (MPa) |
| Example 1 | 1.3 | 2.4 |
| Example 2 | 1.2 | 2.7 |
| Example 3 | 1.1 | 2.6 |
| Comparative example 4 | 1.1-1.5 | 1.6-2.0 |
From the above table, it can be seen that: as can be seen from the data of examples 1-3 and comparative example 4, the surface bonding strength of the PP film faced decorative high-performance board prepared by examples 1-3 is significantly higher than that of the PP film faced decorative board prepared by comparative example 4 (prior art), and is at least higher than 20.0%; the water content is equivalent to that of a comparative example 4 (the prior art), which shows that the PP film veneered decorative board prepared by the formaldehyde-free adhesive has excellent performance.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (10)
1. The production process of the PP film faced decorative high-performance board is characterized by comprising the following steps:
(1) the prepared multilayer solid wood board base material is matched with aldehyde-free glue, and the aldehyde-free glue is uniformly coated on the front surface and the back surface of the base material after the base material is subjected to a double-shaft gluing machine;
the preparation method of the aldehyde-free glue comprises the following steps:
a. adding 40-60 parts by weight of polyether triol and 16-25 parts by weight of tetramethyl glutaric acid into a reaction kettle, and carrying out polymerization reaction for 1-1.5h at the temperature of 76-93 ℃ and the microwave power of 100-200W until the reaction is finished;
b. b, adding 12-20 parts of propyl formate and 30-50 parts of butanone into the reaction kettle after the reaction in the step a, and carrying out dilution reflux reaction for 2-3h at the temperature of 65-70 ℃ to obtain a reaction solution;
c. cooling the reaction liquid prepared in the step b to 43-48 ℃, and adding 9-17 parts of triisopropanolamine for neutralization to form salt;
d. adding 45-70 parts of water into the neutralized salt obtained in the step c at the rotating speed of 2000-3000r/min, and stirring and emulsifying for 20-30min to obtain an emulsion;
e. adding 15-22 parts of N, N-dimethylformamide into the emulsion prepared in the step d to carry out chain extension reaction for 40-60min to prepare a chain extension reactant;
f. adding 8-14 parts of n-butyl alcohol into the chain extension reactant prepared in the step e to carry out end capping reaction for 1.2-2h, so as to prepare aldehyde-free glue;
(2) pushing a base material plate at the front end of a laminator to carry out laminating, then connecting a laminating plate and laying a PP film at the rear end of the laminator, arranging a long-side and short-plate backer on a lifting table for plate stacking, then laying a bottom PP film firstly, then laying the laminating plate to the stacking lifting table horizontally, and laying the front PP film in a reciprocating manner;
(3) placing the laid PP film formaldehyde-free plate in a cold press for prepressing;
(4) after the pre-pressing is finished, the plate is moved to a hot press for hot pressing;
(5) and (4) after the hot pressing is finished, edge sawing is carried out on the board to obtain the PP film veneered decorative high-performance board.
2. The process for producing a PP film faced decorative high performance board as claimed in claim 1, wherein the coating amount of the non-formaldehyde glue in the step (1) is 136-148g/m3。
3. The process for producing a PP film faced decorative high performance board according to claim 1, wherein the polymerization conditions in step a are as follows: the reaction was carried out at a temperature of 87 ℃ and a microwave power of 160W for 1.3 h.
4. The process for producing a PP film faced decorative high performance board according to claim 1, wherein the average efficiency of laying PP film formaldehyde-free board in step (3) is 120 sheets/h.
5. The process for producing a PP film faced decorative high performance board according to claim 1, wherein the pre-pressing pressure in step (3) is 7-8 MPa.
6. The production process of the PP film faced decorative high performance board according to claim 5, wherein the prepressing is carried out for 48-56min under the prepressing pressure of 7-8 MPa.
7. The process for producing a PP film faced decorative high performance board according to claim 1, wherein the hot pressing pressure in step (4) is 7-10 MPa.
8. The process for producing a PP film faced decorative high performance board according to claim 7, wherein the hot pressing temperature is 90-108 ℃.
9. The process for producing the PP film faced decorative high performance board according to claim 8, wherein the hot pressing is carried out at a temperature of 90 to 108 ℃ for 46 to 62 min.
10. A PP film faced decorative high performance board produced according to the process of any one of claims 1-9.
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