Zero-formaldehyde rose straw board and preparation process thereof

Abstract

The invention relates to the technical field of indoor decoration materials, and discloses a zero-formaldehyde rose straw board and a preparation process thereof. The board is mainly composed of rose straw and modified biomass polyurethane adhesive. The rose straw is pretreated, including the steps of washing, drying, crushing and sieving, and the particle size is 0.5-2 mm. The board is composed of the following raw materials in weight percentage: 90% to 97% of rose straw; 3% to 10% of modified biomass polyurethane adhesive. The biomass polyurethane is prepared by the reaction of plant oil-based polyol and isocyanate. The modified biomass polyurethane adhesive is composed of the following raw materials in weight percentage: 80% to 90% of biomass polyurethane; 5% to 10% of plasticizer; 1% to 5% of catalyst. The zero-formaldehyde rose straw board and the preparation process thereof have the advantages that rose straw has a wide source, is not restricted by seasons, has low cost, uses modified biomass polyurethane adhesive, does not contain formaldehyde, is environmentally friendly and healthy, has a simple preparation process, and is mild in conditions, and is suitable for large-scale promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of indoor decoration materials, in particular to a zero-formaldehyde rose straw board and a preparation process thereof. Background Art

[0002] Indoor decoration materials refer to the covering materials used for the walls, ceilings, columns, floors, etc. of buildings. Modern indoor decoration materials can not only improve the indoor artistic environment and make people enjoy beauty, but also have multiple functions such as heat insulation, moisture resistance, fire prevention, sound absorption, and sound insulation. They play a role in protecting the main structure of the building, extending its service life, and meeting certain special requirements. They are an indispensable type of material for modern building decoration.

[0003] There are two common types of particleboard in the existing home decoration market. One is made of inferior small core materials such as sawdust and waste materials of building templates, and the other is made of wheat straw. The former has messy raw materials and complex ingredients. Although the latter is made of crop straw, it has the advantages of low cost and turning waste into treasure, but it is restricted by seasonality. Therefore, there is an urgent need for a zero-formaldehyde rose straw board with simple synthesis process, mild conditions, low cost, and suitable for large-scale promotion and application. Summary of the invention

[0004] The purpose of the present invention is to provide a zero-formaldehyde rose straw board and a preparation process thereof. The zero-formaldehyde rose straw board has a simple synthesis process, mild conditions, low cost and is suitable for large-scale promotion and application.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a zero-formaldehyde rose straw board, the board mainly consists of rose straw and modified biomass polyurethane adhesive;

[0006] The rose straw is pre-processed, including washing, drying, crushing and sieving steps, and the particle size is 0.5-2 mm;

[0007] The board is composed of the following raw materials in weight percentage:

[0008] Rose stalks 60-80%;

[0009] Modified biomass polyurethane adhesive 20-40.

[0010] Preferably, the biomass polyurethane is prepared by reacting vegetable oil-based polyol and isocyanate.

[0011] Preferably, the modified biomass polyurethane adhesive is composed of the following raw materials in percentage by weight:

[0012] Biomass polyurethane 80% to 90%;

[0013] Plasticizer 5% to 10%;

[0014] Catalyst 1%~5%.

[0015] Preferably, the plasticizer is a citrate plasticizer.

[0016] Preferably, the catalyst is an organotin catalyst.

[0017] Preferably, a preparation process of a zero-formaldehyde rose straw board comprises the following steps:

[0018] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0019] S2: washing, drying, crushing and sieving the rose straw for pretreatment to obtain straw powder with a particle size of 0.5-2 mm;

[0020] S3: mixing the pretreated rose straw with the modified biomass polyurethane adhesive in a certain proportion;

[0021] S4: forming the mixed materials into a prototype of a sheet;

[0022] S5: Pressurizing and curing the board prototype to obtain a finished board;

[0023] S6: Cool the finished sheet to room temperature before cutting and packaging.

[0024] Preferably, the forming process adopts hot pressing forming technology, with a temperature of 150° C. to 250° C. and a pressure of 5 MPa to 15 MPa to ensure the density and stability of the board.

[0025] Preferably, the pressurized curing treatment is carried out at a temperature of 100° C. to 180° C. and a pressure of 5 MPa to 10 MPa for a duration of 1 hour to 3 hours to ensure that the board is completely cured.

[0026] Preferably, the density of the board is 0.6 g / cm 3 Up to 0.9g / cm 3 , static bending strength is not less than 15MPa, and water absorption expansion rate is not more than 8%.

[0027] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0028] First, the rose straw of the present invention is widely available, not restricted by seasons, and has low cost. The modified biomass polyurethane adhesive is formaldehyde-free, environmentally friendly and healthy, and has a simple preparation process and mild conditions, which is suitable for large-scale promotion and application.

[0029] Second, the rose straw of the present invention contains natural aromatic compounds, which give the board a unique aroma and have a romantic attribute, so it is suitable for the marriage market and increases the romantic atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall production process steps of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention provides the following technical solutions:

[0033] Embodiment 1

[0034] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles to obtain straw powder with a particle size of 1 mm.

[0035] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0036] Biomass polyurethane 85%;

[0037] Plasticizer 8%;

[0038] Catalyst 7%.

[0039] A preparation process of zero formaldehyde rose straw board:

[0040] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0041] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to less than 10%, use a grinder to crush the dried rose straw, and use a screening machine to screen out rose straw particles with a particle size of 1 mm;

[0042] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 70:30 to obtain a mixed material;

[0043] S4: feeding the mixed material into a hot press machine, hot pressing and forming the mixed material under the conditions of a temperature of 200°C and a pressure of 10 MPa for 2 minutes to form a prototype of a sheet;

[0044] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 150°C and a pressure of 7MPa for 2 hours to obtain a finished board with a density of 0.75g / cm 3 , static bending strength is 18MPa, water absorption expansion rate is 6%;

[0045] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0046] Embodiment 2

[0047] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles to obtain straw powder with a particle size of 1.5 mm.

[0048] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0049] Biomass polyurethane 80%;

[0050] Plasticizer 10%;

[0051] Catalyst 5%.

[0052] A preparation process of zero formaldehyde rose straw board:

[0053] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0054] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to less than 10%, use a grinder to crush the dried rose straw, and use a sieving machine to screen out rose straw particles with a particle size of 1.5 mm;

[0055] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 60:40 to obtain a mixed material;

[0056] S4: The mixed material is fed into a hot press machine and hot-pressed at a temperature of 190°C and a pressure of 8MPa for 2.5 minutes to form a prototype of a sheet;

[0057] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 120°C and a pressure of 6MPa for 1.5 hours to obtain a finished board with a density of 0.70g / cm 3 , static bending strength is 16MPa, water absorption expansion rate is 7%;

[0058] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0059] Embodiment 3

[0060] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles, thereby obtaining straw powder with a particle size of 2 mm.

[0061] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0062] Biomass polyurethane 88%;

[0063] Plasticizer 7%;

[0064] Catalyst 5%.

[0065] A preparation process of zero formaldehyde rose straw board:

[0066] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0067] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to less than 10%, use a grinder to crush the dried rose straw, and use a screening machine to screen out rose straw particles with a particle size of 2 mm;

[0068] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 65:35 to obtain a mixed material;

[0069] S4: The mixed material is fed into a hot press and hot pressed at a temperature of 210°C and a pressure of 12 MPa for 3 minutes to form a prototype of a sheet;

[0070] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 130°C and a pressure of 8MPa for 2.5 hours to obtain a finished board with a density of 0.80g / cm 3 , static bending strength is 20MPa, water absorption expansion rate is 5%;

[0071] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0072] Embodiment 4

[0073] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles to obtain straw powder with a particle size of 0.5 mm.

[0074] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0075] Biomass polyurethane 90%;

[0076] Plasticizer 5%;

[0077] Catalyst 5%.

[0078] A preparation process of zero formaldehyde rose straw board:

[0079] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0080] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to below 10%, use a grinder to crush the dried rose straw, and use a screening machine to screen out rose straw particles with a particle size of 0.5 mm;

[0081] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 75:25 to obtain a mixed material;

[0082] S4: The mixed material is fed into a hot press machine and hot-pressed at a temperature of 180°C and a pressure of 6MPa for 2 minutes to form a prototype of a sheet;

[0083] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 100°C and a pressure of 5MPa for 1 hour to obtain a finished board with a density of 0.65g / cm 3 , static bending strength is 17MPa, water absorption expansion rate is 6.5%;

[0084] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0085] Embodiment 5

[0086] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles, thereby obtaining straw powder with a particle size of 1.2 mm.

[0087] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0088] Biomass polyurethane 83%;

[0089] Plasticizer 9%;

[0090] Catalyst 8%.

[0091] A preparation process of zero formaldehyde rose straw board:

[0092] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0093] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to below 10%, use a grinder to crush the dried rose straw, and use a screening machine to screen out rose straw particles with a particle size of 1.2 mm;

[0094] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 68:32 to obtain a mixed material;

[0095] S4: The mixed material is fed into a hot press machine and hot-pressed at a temperature of 190°C and a pressure of 9 MPa for 2.5 minutes to form a prototype of a sheet;

[0096] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 140°C and a pressure of 7MPa for 2 hours to obtain a finished board with a density of 0.72g / cm 3 , static bending strength is 18.5MPa, water absorption expansion rate is 6.2%;

[0097] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0098] Embodiment 6

[0099] A zero-formaldehyde rose straw board is prepared by washing rose straw to remove surface impurities, drying to reduce moisture content, crushing to form a particle size suitable for board preparation, and sieving to remove unqualified particles, thereby obtaining straw powder with a particle size of 1.8 mm.

[0100] The modified biomass polyurethane adhesive was weighed according to the following weight percentages:

[0101] Biomass polyurethane 86%;

[0102] Plasticizer 6%;

[0103] Catalyst 8%.

[0104] A preparation process of zero formaldehyde rose straw board:

[0105] S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing;

[0106] S2: Wash the rose straw thoroughly with clean water to remove dirt, dust and other impurities on the surface, place the washed rose straw in a drying room, use hot air or natural air drying to reduce the moisture content to less than 10%, use a grinder to crush the dried rose straw, and use a screening machine to screen out rose straw particles with a particle size of 1.8 mm;

[0107] S3: uniformly mixing the modified biomass polyurethane adhesive and the straw powder in a ratio of 62:38 to obtain a mixed material;

[0108] S4: The mixed material is fed into a hot press and hot pressed at a temperature of 215°C and a pressure of 11 MPa for 3 minutes to form a prototype of a sheet;

[0109] S5: The board prototype is subjected to pressurized curing treatment at a temperature of 155°C and a pressure of 8MPa for 2.5 hours to obtain a finished board with a density of 0.82g / cm 3 , static bending strength is 21MPa, water absorption expansion rate is 5.5%;

[0110] S6: The finished plate is cooled to room temperature, and then cut and polished to remove excess burrs, and finally the finished product is packaged.

[0111] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zero-formaldehyde rose straw board, characterized by: The board is mainly composed of rose straw and modified biomass polyurethane adhesive; The rose straw is pre-processed, including washing, drying, crushing and sieving steps, and the particle size is 0.5-2 mm; The board is composed of the following raw materials in weight percentage: Rose stalks 60% to 80%; Modified biomass polyurethane adhesive 20% to 40%.

2. The zero formaldehyde rose straw board according to claim 1, characterized in that: The biomass polyurethane is prepared by reacting vegetable oil-based polyol and isocyanate.

3. The zero formaldehyde rose straw board according to claim 2, characterized in that: The modified biomass polyurethane adhesive is composed of the following raw materials in percentage by weight: Biomass polyurethane 80% to 90%; Plasticizer 5% to 10%; Catalyst 1%~5%.

4. The zero formaldehyde rose straw board according to claim 2, characterized in that: The plasticizer is a citrate plasticizer.

5. The zero formaldehyde rose straw board according to claim 2, characterized in that: The catalyst is an organotin catalyst.

6. The preparation process of a zero-formaldehyde rose straw board according to claim 1, characterized in that: The following steps are involved: S1: Select fresh, pest-free rose stalks and ensure that they are of moderate length for easy subsequent processing; S2: washing, drying, crushing and sieving the rose straw for pretreatment to obtain straw powder with a particle size of 0.5-2 mm; S3: mixing the pretreated rose straw with the modified biomass polyurethane adhesive in a certain proportion; S4: forming the mixed materials into a prototype of a sheet; S5: Pressurizing and curing the board prototype to obtain a finished board; S6: Cool the finished sheet to room temperature before cutting and packaging.

7. The preparation process of a zero-formaldehyde rose straw board according to claim 6, characterized in that: The molding process adopts hot pressing molding technology, with a temperature of 150° C. to 250° C. and a pressure of 5 MPa to 15 MPa to ensure the density and stability of the board.

8. The preparation process of a zero-formaldehyde rose straw board according to claim 1, characterized in that: The pressurized curing treatment is carried out at a temperature of 100° C. to 180° C. and a pressure of 5 MPa to 10 MPa for a duration of 1 hour to 3 hours to ensure that the board is completely cured.

9. The preparation process of a zero-formaldehyde rose straw board according to claim 1, characterized in that: The density of the board is 0.6 g / cm 3 Up to 0.9g / cm 3 , static bending strength is not less than 15MPa, and water absorption expansion rate is not more than 8%.

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