CN105946087B - A kind of fire-resistant-chipboard and preparation method thereof - Google Patents

Abstract

This application discloses a kind of fire-resistant-chipboard and preparation method thereof, raw material is：Wood shavings, polyolefin, zinc stearate, HIPS, melamine cyanurate, triphenyl phosphate, nano silicon dioxide, adhesive, waterproofing agent, sodium alkyl sulfonate, calcium carbonate, hexamethylenetetramine and RDP；Product anti-flammability reaches B1 grades fire retardant, 1 4MPa of bending strength；Oxygen index (OI) 45 50%, plane property, nailability and screw stationarity are excellent, and preparation method is simple, and raw material is simple and easy to get, can produce extensively and constantly replace current material.

Description

A kind of flame-retardant particle board and preparation method thereof

technical field

The invention relates to the technical field of particleboard preparation, in particular to a flame-retardant particleboard and a preparation method thereof.

Background technique

Hollow particle board (also known as "bridge hole mechanical board") is an artificial board made of high-quality, unprocessed tree species of the same nature, crushed and extruded by a press at high temperature. It imitates the hollow principle of the bridge hole in the middle of its core material, and evacuates it (this is why it is called "bridge hole mechanical board"), which makes it more advantageous, because it has holes and reduces weight, which is probably more than ordinary solid wood. It is 60% lighter, but it does not affect its impact resistance. The round shape has good compression resistance and can withstand a pressure of 20KG per square centimeter. This kind of board has the characteristics of heat preservation, sound insulation, impact resistance, no deformation, environmental protection, flame retardancy, and good stability.

Features of hollow particle board:

1. Good thermal insulation performance: 40mm thick hollow particleboard is equivalent to the thermal insulation effect of 300mm brick wall.

2. Good sound insulation effect: the sound insulation effect of 40mm thick hollow particleboard can reach 28 decibels.

3. Good impact resistance: When the hollow particleboard is subjected to strong destructive impact, it can evenly disperse the external force without causing any deformation.

4. Good flame retardant performance: it can withstand flames for 15 minutes in experiments, which is the best performance among the boards.

5. Good stability: ensure the precise thickness tolerance of the core material is 0.1mm.

6. Environmental protection: the release of free formaldehyde reaches the E1 environmental protection standard.

Hollow particleboard originated in Europe. From 1947 to 1949, Otto Kreibaum in West Germany invented vertical extrusion equipment, referred to as OK machine. As the most important production equipment on the hollow particleboard production line, the birth of the OK machine also announced the advent of the hollow particleboard. After 40 to 50 years of development in Europe, my country's wooden door manufacturers began to import hollow particleboard from Germany in the late 1990s. Before 2006, there were only two manufacturers of hollow particleboard, Kaixuan Wood and Guangsheng Wood, with capacities of 20,000 cubic meters and 10,000 cubic meters respectively.

At present, in the domestic market, hollow particleboard is widely used in:

1. Door core material of wooden door;

2. Interior decoration wall partition material;

3. Furniture baffles, desktop core materials, etc.

At present, the most disturbing problem of wood-based panels is the release of free formaldehyde. Free formaldehyde comes from two parts: 1. The formaldehyde release amount of the wood itself; 2. The formaldehyde that has not participated in the reaction in the urea-formaldehyde resin glue, the formaldehyde released during the hot pressing process and the formaldehyde released during use. The fundamental and main reason is the use of urea-formaldehyde resin adhesives. Although free formaldehyde can be reduced through measures such as formaldehyde scavenger, prolonged hot pressing time, and post-treatment of the sheet, this will increase the manufacturing cost of the sheet. For the hollow particleboard produced by the extrusion method, the required amount of urea-formaldehyde resin adhesive can be used to produce a board that meets the requirements, thereby reducing the release of free formaldehyde from the board.

In terms of raw materials: the density of extruded hollow particleboard is much lower than that of flat-pressed particleboard, and the raw materials used to manufacture the same volume of board are far less than ordinary particleboard; if urea-formaldehyde resin is used as adhesive to manufacture particleboard, the qualified flat The sizing amount of the pressed particleboard is 10% to 12%, while the sizing amount of the hollow particleboard is only 4% to 5%. It can be seen that in terms of raw materials, hollow particleboard can also greatly reduce the manufacturing cost of the board.

In terms of equipment: Since the extrusion method produces hollow particleboard, the extrusion head of the extruder controls the feed amount of the extruder, and the thickness of the plate is controlled by the hot pressing plate. Although the single-machine production efficiency of the extruder is relatively low, However, compared with flat-pressed particleboard, the production of hollow-core particleboard by extrusion does not require special paving machines, pre-pressing machines, slab conveyors, and slab acceleration conveyors. Press machine; import extrusion machine from Germany, build a production line of extruded particle board with an annual output of 10,000 meters, only need to invest 4 million yuan in fixed assets. In addition, less equipment is required for the production of extrusion method hollow particle boards; with less equipment, its operating costs and equipment maintenance costs will also be reduced.

The hollow-core particle board is produced by the extrusion method. After the raw material is glued, it can be directly sent to the extrusion machine for extrusion without paving or pre-pressing. It can be seen that compared with the production of particleboard by the flat pressing method, the production of hollow particleboard by the extrusion method can save the two processes of slab paving and pre-pressing, thus simplifying the process flow.

The production of hollow particleboard by extrusion method can use wood processing residues, small-diameter wood, sub-small fuelwood, etc. as raw materials to process and produce homogeneous particleboard, which can realize comprehensive utilization of wood and meet the requirements of industrial development policies and sustainable development.

Hollow particleboard is a new type of product. At present, there are six manufacturers in China, with an annual production capacity of about 100,000 cubic meters. The hollow particleboard produced by the extrusion method has low density, good heat insulation, sound insulation and compression resistance, low cost, and low release of free formaldehyde. gaze. According to the statistics of the wooden door industry in 2007, the annual demand for wooden doors in my country is 120 million square meters (about 70 million wooden doors), which is equivalent to the annual usage of the entire European market. If 10% of wooden doors use hollow particleboard as the door core material (500*1600*33), then about 370,000 cubic meters of hollow particleboard will be needed, plus the amount used as a partition material and furniture industry, the market prospect of hollow particleboard is very broad .

The density of extruded hollow and solid particleboard is 0.35-0.55g/cm, while that of flat-pressed particleboard is about 0.75g/cm. It can be seen that the density of extruded hollow particleboard is lower than that of flat-pressed particleboard. Therefore, using extruded hollow particleboard to make door core board can greatly reduce the quality of the door panel, and the maximum can be reduced by 60%; extruded hollow particleboard has good thermal insulation and sound insulation performance. The sound insulation is as high as 28 decibels; its compression resistance is good, and it will not deform when it is under 2MPa pressure; Comparable to the radial deformation of wood. Although the longitudinal static bending strength of the hollow particleboard produced by the extrusion method is very low, and the water absorption expansion rate in the longitudinal direction is relatively high, the longitudinal static bending strength can fully meet the national standard requirements of ordinary particleboard after veneering with 3mm veneer.

Contents of the invention

This application provides a flame-retardant particleboard with excellent flame-retardant effect, high notched impact strength, oxygen index, tensile strength, bending strength and elongation at break and its preparation method, which solves the problems of existing materials such as oxygen index, notched impact strength, tensile strength, and Technical problems such as low tensile modulus, flexural modulus and low hardness.

The present invention adopts the following technical solutions: a kind of flame-retardant particle board, its raw materials are as follows according to the mass ratio: 100 parts of shavings, 40-80 parts of polyolefin, 5-25 parts of zinc stearate, 10-30 parts of HIPS, 10-30 parts of melamine cyanurate, 5-25 parts of triphenyl phosphate, 0.5-2.5 parts of nano silicon dioxide, 6-10 parts of adhesive, 2-6 parts of waterproofing agent, 2-8 parts of RDP, alkyl 2-6 parts of sodium sulfonate, 10-30 parts of calcium carbonate, 2.5-6.5 parts of hexamethylenetetramine.

As a preferred technical solution of the present invention: the raw materials of the flame-retardant particle board are proportioned as follows in parts by mass: 100 parts of shavings, 50-70 parts of polyolefin, 10-20 parts of zinc stearate, 15-25 parts of HIPS 15-25 parts of melamine cyanurate, 10-20 parts of triphenyl phosphate, 1-2 parts of nano silicon dioxide, 7-9 parts of adhesive, 3-5 parts of waterproofing agent, 4-6 parts of RDP, 3-5 parts of sodium alkylsulfonate, 15-25 parts of calcium carbonate, 3.5-5.5 parts of hexamethylenetetramine.

As a preferred technical solution of the present invention: the raw materials of the flame retardant particleboard are proportioned as follows in parts by mass: 100 parts of shavings, 60 parts of polyolefin, 15 parts of zinc stearate, 20 parts of HIPS, melamine cyanuric acid 20 parts of salt, 15 parts of triphenyl phosphate, 1.5 parts of nano silicon dioxide, 8 parts of adhesive, 4 parts of waterproofing agent, 5 parts of RDP, 4 parts of sodium alkylsulfonate, 20 parts of calcium carbonate, hexamethylene tetra 4.5 parts of amine.

As a preferred technical solution of the present invention: the adhesive is a modified urea-formaldehyde resin adhesive.

As a preferred technical solution of the present invention: the waterproofing agent adopts paraffin wax.

A method for preparing the described flame-retardant particleboard, the steps are:

Step 1: Weigh shavings, polyolefin, zinc stearate, HIPS, melamine cyanurate, triphenyl phosphate, nano silicon dioxide, adhesive, waterproofing agent, RDP, alkane Sodium sulfonate, calcium carbonate and hexamethylenetetramine;

Step 2: Dry the shavings in a tumble dryer, and then put them in a vibrating screen to remove large materials;

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 40-60°C, heat up to 70-90°C Then add nano-silica and heat up to 90-100°C, then add RDP and sodium alkylsulfonate, heat up to 100-110°C, add calcium carbonate, hexamethylenetetramine and the remaining raw materials, and cold mix to 40-50°C Discharge;

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

Beneficial effect

Compared with the prior art, a flame-retardant particleboard and its preparation method according to the present invention have the following technical effects: 1. The flame retardancy of the product reaches the flame-retardant B1 level, and the bending strength is 1-4MPa; 2. The index is 45-50%; 3. Excellent planability, nailability and screw fixability; 4. The preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials.

Detailed ways

The present invention is further described below in conjunction with example, and embodiment is only used to illustrate the present invention, does not constitute the restriction to claim scope, and other alternative means that those skilled in the art can think of, all are in the present invention claim scope.

Example 1:

Step 1: Weigh 100 parts of shavings according to the ratio of parts by mass, 80 parts of polyolefin, 25 parts of zinc stearate, 30 parts of HIPS, 30 parts of melamine cyanurate, 25 parts of triphenyl phosphate, nanometer 2.5 parts of silicon oxide, 10 parts of modified urea-formaldehyde resin adhesive, 6 parts of paraffin wax waterproofing agent, 8 parts of RDP, 6 parts of sodium alkylsulfonate, 30 parts of calcium carbonate, 6.5 parts of hexamethylenetetramine.

Step 2: Dry the shavings in a tumble dryer, then place them in a shaker to remove large material.

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 60°C, add nanometer distillate after heating to 90°C After the silicon oxide is heated to 100°C, RDP and sodium alkylsulfonate are added. After the temperature is raised to 110°C, calcium carbonate, hexamethylenetetramine and the remaining raw materials are added, and the mixture is cooled to 50°C and discharged.

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

The flame retardancy of the product reaches the flame retardant B1 level, the bending strength is 1MPa; the oxygen index is 45%, the planability, nailability and screw fixability are excellent, the preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials .

Example 2:

The first step: Weigh 100 parts of wood shavings according to the ratio of parts by mass, 50 parts of polyolefin, 10 parts of zinc stearate, 15 parts of HIPS, 15 parts of melamine cyanurate, 10 parts of triphenyl phosphate, nanometer two 1 part of silicon oxide, 7 parts of modified urea-formaldehyde resin adhesive, 3 parts of paraffin wax waterproofing agent, 4 parts of RDP, 3 parts of sodium alkylsulfonate, 15 parts of calcium carbonate, and 3.5 parts of hexamethylenetetramine.

Step 2: Dry the shavings in a tumble dryer, then place them in a shaker to remove large material.

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 40°C, add nanometer distillate after heating to 70°C After the silicon oxide is heated to 90°C, add RDP and sodium alkylsulfonate. After the temperature rises to 100°C, add calcium carbonate, hexamethylenetetramine and the rest of the raw materials, and cool down to 40°C to discharge.

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

The flame retardancy of the product reaches flame retardant B1 level, the bending strength is 2MPa; the oxygen index is 46%, the planability, nailability and screw fixability are excellent, the preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials .

Example 3:

Step 1: Weigh 100 parts of wood shavings according to the ratio of parts by mass, 70 parts of polyolefin, 20 parts of zinc stearate, 25 parts of HIPS, 25 parts of melamine cyanurate, 20 parts of triphenyl phosphate, nanometer two 2 parts of silicon oxide, 9 parts of modified urea-formaldehyde resin adhesive, 5 parts of paraffin wax waterproofing agent, 6 parts of RDP, 5 parts of sodium alkylsulfonate, 25 parts of calcium carbonate, and 5.5 parts of hexamethylenetetramine.

Step 2: Dry the shavings in a tumble dryer, then place them in a shaker to remove large material.

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 60°C, add nanometer distillate after heating to 90°C After the silicon oxide is heated to 100°C, RDP and sodium alkylsulfonate are added. After the temperature is raised to 110°C, calcium carbonate, hexamethylenetetramine and the remaining raw materials are added, and the mixture is cooled to 50°C and discharged.

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

The flame retardancy of the product reaches the flame retardant B1 level, the bending strength is 2MPa; the oxygen index is 48%, the planing property, nailability and screw fixation are excellent, the preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials .

Example 4:

The first step: Weigh 100 parts of wood shavings according to the ratio of parts by mass, 60 parts of polyolefin, 15 parts of zinc stearate, 20 parts of HIPS, 20 parts of melamine cyanurate, 15 parts of triphenyl phosphate, nanometer two 1.5 parts of silicon oxide, 8 parts of modified urea-formaldehyde resin adhesive, 4 parts of paraffin wax waterproofing agent, 5 parts of RDP, 4 parts of sodium alkylsulfonate, 20 parts of calcium carbonate, 4.5 parts of hexamethylenetetramine.

Step 2: Dry the shavings in a tumble dryer, then place them in a shaker to remove large material.

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 50°C, add nanometer distillate after heating to 80°C After the silicon oxide is heated to 95°C, RDP and sodium alkylsulfonate are added. After the temperature is raised to 105°C, calcium carbonate, hexamethylenetetramine and the remaining raw materials are added, and the mixture is cooled to 45°C and discharged.

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

The flame retardancy of the product reaches flame retardant B1 level, the bending strength is 3MPa; the oxygen index is 49%, the planability, nailability and screw fixability are excellent, the preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials .

Example 5:

Step 1: Weigh 100 parts of shavings according to the ratio of parts by mass, 40 parts of polyolefin, 5 parts of zinc stearate, 10 parts of HIPS, 10 parts of melamine cyanurate, 5 parts of triphenyl phosphate, and nanometer two 0.5 parts of silicon oxide, 6 parts of modified urea-formaldehyde resin adhesive, 2 parts of paraffin wax waterproofing agent, 2 parts of RDP, 2 parts of sodium alkylsulfonate, 10 parts of calcium carbonate, and 2.5 parts of hexamethylenetetramine.

Step 2: Dry the shavings in a tumble dryer, then place them in a shaker to remove large material.

Step 3: Flame retardant preparation: Add polyolefin, zinc stearate and HIPS, mix while heating, add melamine cyanurate and triphenyl phosphate after heating to 40°C, add nanometer distillate after heating to 70°C After the silicon oxide is heated to 90°C, add RDP and sodium alkylsulfonate. After the temperature rises to 100°C, add calcium carbonate, hexamethylenetetramine and the rest of the raw materials, and cool down to 40°C to discharge.

Step 4: After the dried shavings are mixed with a flame retardant and an adhesive, they enter the extruder to form a continuous flame-retardant extruded solid particleboard or a flame-retardant extruded hollow particleboard.

The flame retardancy of the product reaches flame retardant B1 level, the bending strength is 4MPa; the oxygen index is 50%, the planability, nailability and screw fixability are excellent, the preparation method is simple, the raw materials are simple and easy to obtain, and can be widely produced and continuously replace existing materials .

Claims (5)

1. a kind of fire-resistant-chipboard, which is characterized in that the raw material of the fire-resistant-chipboard is matched as follows by mass fraction：Wood shavings 100 parts, polyolefin be 40-80 part, zinc stearate be 5-25 parts, HIPS10-30 parts, 10-30 parts of melamine cyanurate, phosphorus 5-25 parts of triphenyl phosphate ester, 0.5-2.5 parts of nano silicon dioxide, 6-10 parts of adhesive, 2-6 parts of waterproofing agent, RDP2-8 parts, alkyl sulphur Sour sodium 2-6 parts, 10-30 parts of calcium carbonate, 2.5-6.5 parts of hexamethylenetetramine, the fire-resistant-chipboard production method step is the One step：Wood shavings, polyolefin, zinc stearate, HIPS, melamine cyanurate, phosphoric acid triphen are weighed according to mass fraction proportioning Ester, nano silicon dioxide, adhesive, waterproofing agent, RDP, sodium alkyl sulfonate, calcium carbonate and hexamethylenetetramine；

Second step：Wood shavings are put into cylindrical drier and are dried, is then placed in vibrating screen and removes aniseed；

Third walks：It is prepared by fire retardant：Polyolefin, zinc stearate and HIPS is added, is mixed in heating, after being heated to 40-60 DEG C Melamine cyanurate and triphenyl phosphate is added, nano silicon dioxide is added after being warming up to 70-90 DEG C and is warming up to 90-100 RDP and sodium alkyl sulfonate are added after DEG C, calcium carbonate, hexamethylenetetramine and surplus stock are added after being warming up to 100-110 DEG C, Cold mix to 40-50 DEG C discharges；

4th step：It is continuous fire-retardant crowded that the wood shavings dried add fire retardant that adhesive is added to be formed into extruder after glue mixer stirring It is compacted heart particieboard or fire-retardant extruded hollow particieboard.

2. a kind of fire-resistant-chipboard according to claim 1, which is characterized in that the raw material of the fire-resistant-chipboard presses quality Number proportioning is as follows：100 parts of wood shavings, polyolefin be 50-70 part, zinc stearate be 10-20 parts, HIPS15-25 parts, melamine 15-25 parts of cyanurate, 10-20 parts of triphenyl phosphate, 1-2 parts of nano silicon dioxide, 7-9 parts of adhesive, 3-5 parts of waterproofing agent, RDP4-6 parts, 3-5 parts of sodium alkyl sulfonate, 15-25 parts of calcium carbonate, 3.5-5.5 parts of hexamethylenetetramine.

3. a kind of fire-resistant-chipboard according to claim 1, which is characterized in that the raw material of the fire-resistant-chipboard presses quality Number proportioning is as follows：100 parts of wood shavings, polyolefin be 60 parts, zinc stearate be 15 parts, HIPS20 parts, melamine cyanurate 20 parts, 15 parts of triphenyl phosphate, 1.5 parts of nano silicon dioxide, 8 parts of adhesive, 4 parts of waterproofing agent, RDP5 parts, sodium alkyl sulfonate 4 Part, 20 parts of calcium carbonate, 4.5 parts of hexamethylenetetramine.

4. a kind of fire-resistant-chipboard according to claim 1, it is characterised in that：The adhesive uses modified urea-formaldehyde resin Adhesive.

5. a kind of fire-resistant-chipboard according to claim 1, it is characterised in that：The waterproofing agent uses paraffin.