CN101724255A - Wood powder reinforced polyurethane wood-imitation material for furniture and production method thereof - Google Patents

Abstract

The present invention is wood powder reinforced polyurethane imitation wood material for furniture and its production method. The mixture of polyether polyol, foaming agent, catalyst, stabilizer and flame retardant is used as white material, polyisocyanate is used as black material, and 80 ~100 mesh wood flour filler is used as reinforcing agent, and the mass ratio of white material, black material and wood flour is 112:112:7. Production method: mix the white material according to the ratio to make a combined polyether; add wood flour to make a wood flour/combined polyether mixture; add black material to make a foaming mixture; injection mold and mature for 20 minutes before demoulding Get wood powder reinforced polyurethane imitation wood material. Advantages: The imitation wood materials and products produced have enhanced compressive strength and impact resistance, significant wood feeling effect, improved density distribution, stable size, small deformation, excellent heat insulation and sound insulation performance, hard and aging resistance, and flame retardancy reaching the level of architecture B2 level, the product is environmentally friendly, low in cost, and has good processing properties such as sawing, planing, drilling, nailing, grinding, sticking, coloring, and finishing.

Description

Wood flour reinforced polyurethane imitation wood material for furniture and production method thereof

technical field

The invention relates to a kind of foamed polyurethane component raw material as the matrix, with wood powder filler as the reinforcing agent, through blending, stirring, foaming, injection molding, aging, demoulding and other processing techniques to manufacture wood powder reinforcement for furniture. Polyurethane imitation wood material and its production method. It belongs to the technical field of material and product production.

Background technique

In recent years, due to the reduction of timber resources in the world, China's timber resources have decreased faster. On the other hand, with the improvement of people's living standards, human beings have higher and higher requirements for the quantity and quality of timber utilization, and my country can provide Timber resources are very limited, therefore, the contradiction between supply and demand of timber resources is becoming increasingly prominent. At present, there are three main ways to solve the contradiction between timber supply and demand: 1) increasing timber imports; 2) vigorously developing artificial fast-growing forests; 3) looking for alternative materials. First of all, increase the import of timber. In recent years, the number of timber species and countries imported by my country has been increasing. Although imported timber has largely solved the problem of timber shortage in my country, with the worldwide shortage of timber resources, the environment is deteriorating day by day. As well as the enhancement of people's awareness of environmental protection, most countries have adopted certain policy restrictions on timber exports, and if my country has been relying on importing foreign timber resources, it will definitely have an adverse impact on the long-term development of my country's timber industry. It can be seen that imports Timber is not the fundamental solution to the long-term shortage of timber in our country. Secondly, vigorously develop artificial fast-growing forests. Fast-growing forests have relatively high requirements on the growth environment, and vigorous development requires the use of a large amount of cultivated land. my country is originally a large agricultural country with a small land and a large population. This has limited the development of artificial fast-growing forests. degree of limitation. To sum up, as far as the current situation is concerned, it is more practical to find and study wood substitute materials to alleviate the contradiction between supply and demand of my country's wood resources. Replacing wood with plastic is one of the effective ways to solve the contradiction between supply and demand of wood.

Contents of the invention

What the present invention proposes is a kind of wood powder reinforced polyurethane imitation wood material for furniture and its production method. Its purpose is to overcome some shortcomings of existing traditional pure polyurethane imitation wood materials. Using wood powder filler as a reinforcing agent, by adding wood powder filler, to improve the foaming performance of polyurethane, the reaction index and the density distribution, mechanical properties, wood feeling effect and flame retardancy of polyurethane imitation wood materials, at the same time, it can realize the comprehensive performance of wood powder Utilize, reduce the consumption of polyurethane raw materials, save raw material costs, and expand its application channels.

Technical solution of the present invention: wood flour reinforced polyurethane imitation wood material for furniture, characterized in that the components include a mixture of polyether polyol, foaming agent, catalyst, stabilizer, etc. as white material, and polyisocyanate as black material , with 80-100 mesh wood flour filler as reinforcing agent, composite flame retardant as flame retardant, the mass ratio of white material, black material, wood flour, and flame retardant is 112:112:7:11.

The white material component includes a mixture of polyether polyols 4110II, 403, 330N and 210, a foaming agent of HCFC-141b, a catalyst of PC-5, PC-8 and A-33, and a foam stabilizer for L-6950. In the white material, the polyether polyol accounts for 90% of the total weight, the foaming agent accounts for 7.2% of the total weight, the catalyst accounts for 1% of the total weight, and the stabilizer accounts for 1.8% of the total weight.

The black material component is polyphenyl polymethylene polyisocyanate (PAPI).

The reinforcing agent component is 80-100 mesh wood powder filler, which is made of sanded wood powder or sawdust, wood shavings, wood chips, etc. after being crushed, sieved and dried into 80-100 mesh wood powder.

The composite flame retardant component is a mixture of TCEP and DMMP, and the mass ratio of TCEP to DMMP is 3:1.

The preparation method of wood flour reinforced polyurethane imitation wood material for furniture is characterized in that the method comprises the following process steps:

1) The components of the white material and the composite flame retardant are accurately weighed according to the proportion, mixed, and stirred at high speed for 1 minute to make a combined polyether;

2) Weigh the 80-100 mesh wood flour filler reinforcing agent according to the proportion, add it to the combined polyether prepared above, stir it with a stirrer at high speed for 1 minute, and prepare the wood flour/combined polyether mixture.

3) Weigh the black material (PAPI) according to the proportion, and add it into the wood powder/combined polyether mixture prepared above, and stir it at high speed for 6-10 seconds with a stirrer to form a foaming mixture.

4) Immediately and quickly inject the foaming mixture into the mold, the mold is coated with a release agent, the temperature of the mold is 30-40°C, the mold is injected and aged for 20 minutes, and then the mold is demoulded to obtain a wood powder reinforced polyurethane imitation wood material.

The preparation method of the wood flour reinforced polyurethane imitation wood material for furniture is characterized in that the process conditions include that the temperature of the white material and the black material are both 20-24°C, the ambient temperature is room temperature of 15-26°C, and the mechanical stirrer The stirring speed is 2600~3000r/min.

Advantages of the present invention: the present invention is a kind of wood powder reinforced polyurethane imitation wood material for furniture which is prepared by blending, stirring, foaming, injection molding, curing, demoulding, etc. by using foamed polyurethane component raw materials and wood powder filler. Formula and process, its wood powder raw material is easy to get, and the modification and strengthening process is simple and convenient. Compared with the existing traditional pure polyurethane imitation wood material, the wood powder reinforced polyurethane imitation wood material obtained by the present invention has enhanced compressive strength and impact resistance, remarkable wood feeling effect, improved density distribution, stable size and low deformation Small resistance, excellent heat insulation and sound insulation performance, hard, aging resistance, flame retardant performance can reach building B2 level; at the same time, it can realize the comprehensive utilization of wood flour, reduce the consumption of polyurethane raw materials, save raw material costs, and the product is environmentally friendly; and has good sawing and planing , drilling, nailing, grinding, sticking, coloring, coating and other processing properties, and can be molded into various special-shaped or products with relief patterns or decorations according to the shape of the mold, which can be used to make wood-like furniture, doors and windows, mirror frames, decorations Lines, home crafts, etc.

Detailed ways:

Embodiment 1: With polyether polyol YT-4110II, YT-403, YT-330N and N-210, blowing agent HCFC-141b, catalyst PC-5, PC-8 and A-33, foam stabilizer is L -6950 and other blends are white material components; polyphenyl polymethylene polyisocyanate (PAPI) Suprasec 5005 is used as black material components; 80-100 mesh wood powder fillers are used as reinforcing agents, TCEP and DMMP are used It is a composite flame retardant, and the mass ratio of white material, black material, wood flour and flame retardant is 112:112:7:11. In the white material, polyether polyol accounts for 90%, blowing agent accounts for 7.2%, catalyst accounts for 1%, and stabilizer accounts for 1.8%. In the composite flame retardant, the mass ratio of TCEP to DMMP is 3:1.

The manufacturing process of wood flour reinforced polyurethane imitation wood materials for furniture: 1) The temperature of white material and black material are both 20-24°C, and the ambient temperature is 15-26°C at room temperature; 2) The white material and composite resistance Mix the fuel and stir at high speed (3000r/min) for 1 minute to make a combined polyether; 3) add poplar sanded wood powder (80-100 mesh) according to the proportion, and stir at high speed (3000r/min) for 1 minute to make 4) Add Suprasec 5005 black material according to the ratio and stir at high speed (3000r/min) for 10 seconds to make a foaming mixture; 5) Quickly inject a certain amount of foaming mixture into the mold (coated with a release agent, the mold temperature is 35° C.) and aged for 20 minutes and then demoulded to obtain a wood powder reinforced polyurethane imitation wood material. The properties of imitation wood material products are shown in the table below:

Table 1 The main performance parameters of wood powder reinforced polyurethane imitation wood materials

Claims (7)

1. Wood powder reinforced polyurethane imitation wood material for furniture, characterized in that the components include a mixture of polyether polyol, foaming agent, catalyst and stabilizer as white material, polyisocyanate as black material, and 80-100 mesh The wood powder filler is used as a reinforcing agent, and the composite flame retardant is used as a flame retardant, wherein the mass ratio of white material, black material, wood powder, and flame retardant is 112:112:7:11. 2. wood powder for furniture according to claim 1 strengthens polyurethane imitation wood material, it is characterized in that the component of white material comprises the mixture that polyether polyol is 4110II, 403, 330N and 210, and blowing agent is HCFC-141b , the catalyst is a mixture of PC-5, PC-8 and A-33, the foam stabilizer is a mixture of L-6950, in the white material, polyether polyol accounts for 90% of the total weight, and the foaming agent accounts for 90% of the total weight 7.2%, the catalyst accounts for 1% of the total weight, and the stabilizer accounts for 1.8% of the total weight. 3. wood powder for furniture according to claim 1 strengthens polyurethane imitation wood material, it is characterized in that the component of black material is polyphenyl polymethylene polyisocyanate (PAPI). 4. The wood powder reinforced polyurethane imitation wood material for furniture according to claim 1 is characterized in that the components of the reinforcing agent are 80-100 mesh wood powder fillers, which are ground by sanding wood powder or sawdust, wood shavings, and wood chips. , through sieving and drying into 80-100 mesh wood flour. 5. The wood powder reinforced polyurethane imitation wood material for furniture according to claim 1 is characterized in that the component of the composite flame retardant is a mixture of TCEP and DMMP, and the mass ratio of TCEP and DMMP is 3: 1. 6. A method for producing wood powder reinforced polyurethane imitation wood materials for furniture, characterized in that the method comprises the following process steps: 1) The components of the white material and the composite flame retardant are accurately weighed according to the proportion, mixed, and stirred at high speed by a stirrer for 1 minute to make a combined polyether; 2) Weigh 80-100 mesh wood flour according to the proportion, add it to the combined polyether prepared above, stir with a stirrer at high speed for 1 minute, and make a wood flour/combined polyether mixture. 3) Weigh the corresponding mass of the black material (PAPI) according to the proportion, and add it to the wood flour/combined polyether mixture prepared above, and immediately stir it with a stirrer at high speed for 6-10 seconds to form a foaming mixture. 4) Immediately and quickly inject the foaming mixture into the mold, the mold is coated with a release agent, the temperature of the mold is 30-40°C, the mold is injected and aged for 20 minutes, and then the mold is demoulded to obtain a wood powder reinforced polyurethane imitation wood material. 7. The preparation method of wood flour reinforced polyurethane imitation wood material for furniture according to claim 6, characterized in that the process conditions include that the temperature of white material and black material is 20～24°C, and the ambient temperature is 15～26°C. At room temperature, the stirring speed of the mechanical stirrer is 2600-3000r/min.