Preparation method of polypropylene wood-plastic thermal insulation material

Abstract

The invention discloses a preparation method of a polypropylene wood-plastic thermal insulation material, which comprises the following steps: raw material preparation, raw material pretreatment, mixing and blending, extrusion molding, raw material pretreatment after raw material preparation, and preparation of related materials for preparation of the polypropylene wood-plastic thermal insulation material during use. The preparation method comprises the following steps: preparing matrix materials of polypropylene PP particles, wood flour, aerogel and an auxiliary additive according to different proportions, drying the wood flour until the water content is less than 3%, further drying the prepared wood flour, and after the treatment, adding the aerogel into the matrix materials, the method comprises the following steps: adding dried wood flour, polypropylene PP particles, a heat insulation auxiliary agent and an auxiliary additive into a mixing machine according to a ratio, mixing for 5-10 minutes at normal temperature, melting a plurality of materials by using a double-screw extruder through high-speed melting operation, uniformly dispersing the materials to form a wood-plastic composite melt, and then detecting the performance of the whole material.

Description

Technical Field

[0001] The invention relates to the technical field of polypropylene wood-plastic thermal insulation materials, in particular to a preparation method of a polypropylene wood-plastic thermal insulation material. Background Art

[0002] In the construction industry, with the intensification of the global energy crisis and the improvement of people's requirements for indoor environmental comfort, building energy conservation has become a key issue. The thermal insulation performance of buildings is directly related to the level of energy consumption. Traditional building materials such as bricks, concrete and other materials have poor thermal insulation effects. Heat is easily transmitted into the room in summer and easily dissipated in winter, resulting in huge energy consumption of air conditioning and heating systems. Wood plastic composite materials, as a new type of environmentally friendly materials, have developed rapidly in recent years. They are mainly based on thermoplastic plastics such as polyethylene, polypropylene, and polyvinyl chloride, mixed with plant fibers such as wood powder, rice husks, and straw, and are prepared by melt compounding and extrusion molding (extrusion, injection molding, molding, etc.). Wood plastic materials have the dual characteristics of wood and plastic. On the one hand, they have the characteristics of wood. It has the natural texture, good processing performance and nailing and sawing properties. On the other hand, it has the advantages of plastic such as water resistance, anti-corrosion, insect resistance, and easy cleaning. It can be widely used in architectural decoration, outdoor facilities, furniture manufacturing, logistics packaging and other fields. Taking architectural decoration as an example, wood-plastic panels can be used for indoor wall decoration and ceiling ceilings. Its aesthetics and durability are better than traditional wood. Outdoors, wood-plastic floors, fences, plank roads and other products do not require frequent maintenance due to their good weather resistance and have a long service life. However, conventional wood-plastic composite materials have deficiencies in thermal insulation performance and are difficult to meet application scenarios with high requirements for thermal insulation. Therefore, we need a preparation method for polypropylene wood-plastic thermal insulation materials to carry out the preparation operation of polypropylene wood-plastic thermal insulation materials.

[0003] The preparation method of polypropylene wood-plastic insulation material currently used is that polypropylene is a commonly used base plastic for wood-plastic composite materials, but the thermal insulation performance of polypropylene itself is limited. Moreover, in the process of compounding with plant fibers, if the preparation method is improper, problems such as poor compatibility between the fibers and the plastic matrix and uneven dispersion will occur, resulting in the comprehensive performance of the composite material, especially the thermal insulation performance and mechanical properties, which are difficult to reach the ideal level. Summary of the Invention

[0004] The object of the present invention is to provide a method for preparing a polypropylene wood-plastic thermal insulation material to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A preparation method of a polypropylene wood-plastic thermal insulation material comprises raw material preparation, raw material pretreatment, mixing and blending, and extrusion molding. The raw material preparation is followed by raw material pretreatment, and the raw material pretreatment is followed by uniform mixing and blending. The mixing and blending is followed by extrusion molding.

[0007] A method for preparing a polypropylene wood-plastic thermal insulation material comprises the following steps:

[0008] S1. Prepare the relevant materials for preparing polypropylene wood-plastic insulation materials. It is necessary to prepare the base material polypropylene PP particles, wood powder, aerogel and auxiliary additives in different proportions, wherein the wood powder is 80-120 mesh and dried to a moisture content of less than 3%;

[0009] S2, further drying the prepared wood powder, after which the dried wood powder, polypropylene PP particles, thermal insulation additives, and auxiliary additives are added to a mixer in proportion, mixed at room temperature for 5 to 10 minutes, and simultaneously melted at high speed using a twin-screw extruder to achieve melting of multiple materials, so that the materials are evenly dispersed to form a wood-plastic composite melt;

[0010] S3, then take out the formed wood-plastic composite melt, and after taking it out, different molds can be selected for shaping according to the required product form, such as plate molds, sheet molds and profile molds. Secondly, the plastic wood-plastic composite cylinder can be cooled by water cooling or air cooling to control the cooling rate and avoid damage caused by internal stress;

[0011] S4. Finally, the formed polypropylene wood-plastic insulation material is processed. The formed material can be cut or drilled, and the material is polished and coated with a reflective insulation coating. After completion, the performance of the entire material is tested.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The polypropylene wood-plastic thermal insulation material is prepared by raw material preparation, raw material pretreatment, mixing and blending, and extrusion molding. The polypropylene wood-plastic thermal insulation material is non-toxic and environmentally friendly, which is in line with the current green development concept; it has strong chemical corrosion resistance and can maintain stable performance in a variety of acid and alkali chemical environments; the price is relatively low and the source is wide, which is conducive to large-scale production to reduce costs; it has good processing performance and is easy to prepare products of various shapes through molding processes such as extrusion and injection molding, while improving thermal insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the classification and preparation process of a method for preparing a polypropylene wood-plastic thermal insulation material of the present invention;

[0015] Figure 2 This is a schematic diagram of the raw material pretreatment process of a method for preparing a polypropylene wood-plastic thermal insulation material of the present invention;

[0016] Figure 3This is a schematic diagram of the mixing and blending process of a method for preparing a polypropylene wood-plastic thermal insulation material of the present invention;

[0017] Figure 4 The present invention is a schematic diagram of the post-processing process of a method for preparing a polypropylene wood-plastic thermal insulation material. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 - Figure 4 The present invention provides a technical solution for a method for preparing a polypropylene wood-plastic thermal insulation material:

[0020] A preparation method of a polypropylene wood-plastic thermal insulation material comprises raw material preparation, raw material pretreatment, mixing and blending, and extrusion molding. The raw material preparation is followed by raw material pretreatment, and the raw material pretreatment is followed by uniform mixing and blending. The mixing and blending is followed by extrusion molding.

[0021] A method for preparing a polypropylene wood-plastic thermal insulation material comprises the following steps:

[0022] S1. Prepare the relevant materials for preparing polypropylene wood-plastic insulation materials. It is necessary to prepare the base material polypropylene PP particles, wood powder, aerogel and auxiliary additives in different proportions, wherein the wood powder is 80-120 mesh and dried to a moisture content of less than 3%;

[0023] S2, further drying the prepared wood powder, after which the dried wood powder, polypropylene PP particles, thermal insulation additives, and auxiliary additives are added to a mixer in proportion, mixed at room temperature for 5 to 10 minutes, and simultaneously melted at high speed using a twin-screw extruder to achieve melting of multiple materials, so that the materials are evenly dispersed to form a wood-plastic composite melt;

[0024] S3, then take out the formed wood-plastic composite melt, and after taking it out, different molds can be selected for shaping according to the required product form, such as plate molds, sheet molds and profile molds. Secondly, the plastic wood-plastic composite cylinder can be cooled by water cooling or air cooling to control the cooling rate and avoid damage caused by internal stress;

[0025] S4. Finally, the formed polypropylene wood-plastic insulation material is processed. The formed material can be cut or drilled, and the material is polished and coated with a reflective insulation coating. After completion, the performance of the entire material is tested.

[0026] It should be noted that the present invention is a method for preparing a polypropylene wood-plastic thermal insulation material. When used, the relevant materials for preparing the polypropylene wood-plastic thermal insulation material are prepared. It is necessary to prepare the base material polypropylene PP particles, wood powder, aerogel and auxiliary additives in different proportions, wherein the wood powder is 80-120 mesh and dried to a moisture content of less than 3%. The prepared wood powder is further dried. After the treatment, the dried wood powder, polypropylene PP particles, thermal insulation additives and auxiliary additives are added to a mixer in proportion and mixed at room temperature for 5 to 10 minutes. At the same time, a twin-screw extruder is used through a high-speed melting operation to achieve melting of multiple materials so that the materials are evenly dispersed. A wood-plastic composite melt is formed, and then the formed wood-plastic composite melt is taken out. After taking it out, different molds can be selected for shaping according to the required product form, such as plate molds, sheet molds and profile molds. Secondly, the plastic wood-plastic composite cylinder can be cooled by water cooling or air cooling to control the cooling rate to avoid damage caused by internal stress. Finally, the formed polypropylene wood-plastic thermal insulation material is processed, and the formed material can be cut or drilled, and the material can be polished and coated with a reflective thermal insulation coating. After completion, the performance of the entire material is tested. In this way, a preparation method of a polypropylene wood-plastic thermal insulation material is completed.

[0027] 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 variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a polypropylene wood-plastic thermal insulation material, characterized in that: The method comprises raw material preparation, raw material pretreatment, mixing and blending, and extrusion molding. The raw material preparation is followed by raw material pretreatment, and the raw material pretreatment is followed by unified mixing and blending, and extrusion molding is performed after the mixing and blending.

2. A method for preparing a polypropylene wood-plastic thermal insulation material, characterized in that: The following steps are involved: S1. Prepare the relevant materials for preparing polypropylene wood-plastic insulation materials. It is necessary to prepare the base material polypropylene PP particles, wood powder, aerogel and auxiliary additives in different proportions, wherein the wood powder is 80-120 mesh and dried to a moisture content of less than 3%; S2, further drying the prepared wood powder, after which the dried wood powder, polypropylene PP particles, thermal insulation additives, and auxiliary additives are added to a mixer in proportion, mixed at room temperature for 5 to 10 minutes, and simultaneously melted through a high-speed melting operation using a twin-screw extruder to achieve melting of multiple materials, so that the materials are evenly dispersed to form a wood-plastic composite melt; S3, then take out the formed wood-plastic composite melt, and after taking it out, different molds can be selected for shaping according to the required product form, such as plate molds, sheet molds and profile molds. Secondly, the plastic wood-plastic composite cylinder can be cooled by water cooling or air cooling to control the cooling rate and avoid damage caused by internal stress; S4. Finally, the formed polypropylene wood-plastic insulation material is processed. The formed material can be cut or drilled, and the material is polished and coated with a reflective insulation coating. After completion, the performance of the entire material is tested.

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