CN117183404A - Production technology and boards of continuous fiber prepreg mesh fabric reinforced wood-plastic materials - Google Patents

Abstract

The application discloses a production process and a board of a continuous fiber prepreg mesh fabric reinforced wood-plastic material, wherein the production process comprises the following steps: step one: coating the continuous fiber with a first thermoplastic resin through a pre-impregnation procedure to prepare a coated fiber; step two: braiding the coated fibers into a mesh fabric by using braiding equipment, and introducing the mesh fabric into a coextrusion die; step three: and adding the second thermoplastic resin and the wood filler into a coextrusion die, and obtaining the continuous fiber prepreg grid fabric reinforced wood-plastic material through a coextrusion process. According to the production process, the wettability of the continuous fibers in the composite material is ensured by impregnating the continuous fibers and then weaving the continuous fibers; the strength of the composite material can be enhanced in all directions by making the continuous fiber reinforcement in a weaving state; by making the fiber fabric in a grid state, the resin is crosslinked with each other through the continuous fibers in the grid state, and the delamination of the composite material is effectively inhibited.

Description

Production technology and boards of continuous fiber prepreg mesh fabric reinforced wood-plastic materials

Technical field

The present application relates to the field of wood-plastic composite materials, specifically to a production process of continuous fiber pre-impregnated grid fabric-reinforced wood-plastic material and its board.

Background technique

Wood-plastic composite material is a composite material mainly made of wood or cellulose and plastic. The mechanical reinforcement of wood-plastic composite material through fiber co-extrusion has been widely used in the industry. In the existing technology, chopped fibers are generally used. Chopped fibers are in a disordered state in wood-plastic composite materials, resulting in partially uncontrollable reinforcing effects on wood-plastic composite materials and making it difficult to guarantee quality.

Therefore, there is a need for a production process of continuous fiber prepreg mesh fabric-reinforced wood-plastic materials and its boards to at least partially solve the above problems.

Contents of the invention

This summary introduces a series of concepts in a simplified form that are further described in detail in the detailed description. The invention summary part of this application is not intended to limit the key features and necessary technical features of the claimed technical solution, nor is it intended to determine the protection scope of the claimed technical solution.

In order to at least partially solve the above problems, the first aspect of the present application provides a production process of continuous fiber prepreg mesh fabric reinforced wood plastic materials, the production process includes the following steps:

Step 1: Coat the continuous fiber with the first thermoplastic resin through a prepreg process to prepare coated fiber;

Step 2: Use weaving equipment to weave the coated fiber into a mesh fabric, and introduce the mesh fabric into a co-extrusion die;

Step 3: Add the second thermoplastic resin and wood filler into the co-extrusion mold, and obtain a continuous fiber prepreg mesh fabric reinforced wood-plastic material through a co-extrusion process.

Optionally, the step one also includes subjecting the continuous fibers to a spreading process before the prepreg process; and/or

The continuous fibers include one or more of glass fibers, basalt fibers, carbon fibers, aramid fibers, lignin fibers and polyester fibers.

Optionally, the wood filler includes at least one of wood powder, bamboo powder and plant straw powder.

Optionally, the first thermoplastic resin and the second thermoplastic resin can be melted with each other.

Optionally, the first thermoplastic resin includes at least one of polyethylene, polypropylene, polyamide, polyphenylene sulfide or polyether ether ketone; and/or

The second thermoplastic resin includes at least one of polyethylene, polypropylene, polyamide, polyphenylene sulfide or polyether ether ketone.

Optionally, the co-extrusion mold is provided with an injection port, and step three further includes adding the second thermoplastic resin and the wood filler into the co-extrusion mold from the injection port.

Optionally, step two further includes introducing at least two layers of mesh fabric into the co-extrusion die at predetermined intervals.

Optionally, the mesh size of the mesh fabric is 2 to 20 mm.

Optionally, the step one further includes: coating the continuous fiber with a grafting agent before the pre-impregnation process.

According to the production process of continuous fiber pre-impregnated mesh fabric reinforced wood-plastic materials of the present application, by impregnating the continuous fibers first and then weaving, the wettability of the continuous fibers in the composite material is ensured; by making the reinforced continuous fibers in a braided state, it is achieved The strength of the composite material can be enhanced in all directions; by making the fiber fabric into a mesh pattern, the resins are cross-linked with each other through the mesh-like continuous fibers, effectively inhibiting the delamination of the composite material. The production process according to the present application has few processes, simple structure and streamlined operation, and can produce wood-plastic materials with good reinforcing effect, uniform structure and high strength.

The second aspect of the present application provides a continuous fiber prepreg mesh fabric reinforced wood-plastic board, produced by the production process of the continuous fiber prepreg mesh fabric reinforced wood-plastic material according to the first aspect of the application.

The continuous fiber pre-impregnated mesh fabric reinforced wood-plastic board according to the present application is produced through a production process using woven mesh fiber reinforcement, and the finished product has high mechanical strength, uniform structure and good reinforcement quality.

Description of the drawings

The following drawings of this application are hereby incorporated by reference and are incorporated into the understanding of this application. The drawings illustrate embodiments of the present application and their descriptions to explain the principles of the present application.

In the attached picture:

Figure 1 is a schematic diagram of the equipment for the production process of continuous fiber prepreg mesh fabric reinforced wood plastic materials according to the present application.

Explanation of reference symbols:

1: Unwinding equipment;

2: Mesh fabric;

3: Co-extrusion mold;

4: Injection port;

5: Wood-plastic board.

Detailed ways

In the following description, numerous specific details are given in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced without one or more of these details. In other examples, some technical features that are well known in the art are not described in order to avoid confusion with the present application.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, it should also be understood that when the terms "comprises" and/or "includes" are used in this specification, they indicate the presence of said features, integers, steps, operations, elements and/or components but do not exclude the presence or Attaching one or more other features, integers, steps, operations, elements, components and/or combinations thereof.

Ordinal words such as "first" and "second" cited in this application are merely identifiers and do not have any other meaning, such as a specific order, etc. Furthermore, for example, the term "first component" does not by itself imply the presence of a "second component" and the term "second component" does not by itself imply the presence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in this article are for illustrative purposes only. , not a restriction.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

This application provides a production process for continuous fiber prepreg mesh fabric reinforced wood plastic materials. The production process includes the following steps:

Step 1: Coat the continuous fiber with the first thermoplastic resin through a prepreg process to prepare coated fiber;

Step 2: Use weaving equipment to weave the coated fiber into a mesh fabric, and introduce the mesh fabric into the co-extrusion mold;

Step 3: Add the second thermoplastic resin and wood filler into the co-extrusion mold, and obtain a continuous fiber prepreg mesh fabric reinforced wood-plastic material through the co-extrusion process.

According to the production process of continuous fiber pre-impregnated mesh fabric reinforced wood-plastic materials of the present application, by impregnating the continuous fibers first and then weaving, the wettability of the fibers in the composite material is ensured; by making the reinforcing fibers in a braided state, the composite The strength of the material is uniformly enhanced; by making the fiber fabric into a mesh state, the resins are cross-linked with each other through the mesh, effectively suppressing the delamination of the composite material. The production process according to the present application has few processes, simple structure and streamlined operation, and can produce wood-plastic materials with good reinforcing effect, uniform structure and high strength.

In step one, the continuous fibers include one or more of glass fibers, basalt fibers, carbon fibers, aramid fibers, lignin fibers and polyester fibers. The prepreg process includes a melt impregnation process. Step one also includes subjecting the continuous fibers to a spreading process before the prepreg process. The continuous fibers can be spread by vibration and rolling. The spread continuous fibers are coated with the first thermoplastic resin through a melt impregnation process. A bundle of fibers is coated with the first thermoplastic resin to obtain coated fibers. A bundle of coated fibers contains 1 to 1,000 continuous fiber filaments. Wherein, the first thermoplastic resin includes at least one of polyethylene, polypropylene, polyamide, polyphenylene sulfide or polyether ether ketone.

In other embodiments, step one further includes: coating the continuous fiber with a grafting agent before the prepreg process.

After the coated fiber is produced, in step two, the coated fiber is woven into a mesh fabric through a weaving device, and the mesh fabric is introduced into the co-extrusion die. Among them, the mesh size of the mesh fabric is 2 to 20 mm. Preferably, at least two layers of mesh fabric are introduced into the coextrusion die at predetermined intervals.

In step three, the molten, premixed second thermoplastic resin and wood filler are added into the co-extrusion mold, and a continuous fiber prepreg mesh fabric reinforced wood-plastic material is obtained through the co-extrusion process. Preferably, the co-extrusion mold is provided with an injection port, and step three further includes adding the second thermoplastic resin and the wood filler into the co-extrusion mold from the injection port. The second thermoplastic resin and the first thermoplastic resin can be melted with each other. The second thermoplastic resin includes at least one of polyethylene, polypropylene, polyamide, polyphenylene sulfide or polyetheretherketone. The wood filler includes at least one of wood powder, bamboo powder and plant straw powder.

Referring to Figure 1, after the mesh fabric 2 is rolled, it is introduced into the co-extrusion die 3 at predetermined intervals through the unwinding device 1. The co-extrusion die 3 is provided with an injection port 4. The molten, premixed second thermoplastic resin and wood filler are simultaneously added into the co-extrusion die 3 from the injection port 4, and are combined with the mesh fabric 2 through a co-extrusion process to obtain continuous fibers. Pre-impregnated mesh fabric reinforced wood plastic material.

The second aspect of the present application provides a continuous fiber prepreg mesh fabric reinforced wood-plastic board, produced by the production process of the continuous fiber prepreg mesh fabric reinforced wood-plastic material according to the first aspect of the application.

Referring to Figure 1, the mesh fabric 2, the second thermoplastic resin and the wood filler are co-extruded to obtain the wood-plastic board 5.

The continuous fiber pre-impregnated mesh fabric reinforced wood-plastic board according to the present application is produced through a production process using woven mesh fiber reinforcement, and the finished product has high mechanical strength, uniform structure and good reinforcement quality.

The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations may be performed in an order different from that of the above flow. The sequence of steps in the above process can also be added, combined or deleted according to actual needs.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this application. The terminology used herein is for the purpose of describing specific implementations only and is not intended to limit the application. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is inapplicable in that other embodiment or otherwise stated.

The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and illustration. The present application is not limited to the above-mentioned embodiments, and more can be made according to the teachings of the present application. Various variations and modifications, these variations and modifications all fall within the scope of protection claimed by this application.

Claims (10)

1. A production process for continuous fiber prepreg mesh fabric reinforced wood-plastic materials, characterized in that the production process includes the following steps: Step 1: Coat the continuous fiber with the first thermoplastic resin through a prepreg process to prepare coated fiber; Step 2: Use weaving equipment to weave the coated fiber into a mesh fabric, and introduce the mesh fabric into a co-extrusion die; Step 3: Add the second thermoplastic resin and wood filler into the co-extrusion mold, and obtain a continuous fiber prepreg mesh fabric reinforced wood-plastic material through a co-extrusion process. 2. The production process of continuous fiber pre-impregnated mesh fabric reinforced wood-plastic materials according to claim 1, characterized in that the step one further includes spreading the continuous fibers before the pre-impregnation process. process; and/or The continuous fibers include one or more of glass fibers, basalt fibers, carbon fibers, aramid fibers, lignin fibers and polyester fibers. 3. The production process of continuous fiber prepreg mesh fabric reinforced wood-plastic materials according to claim 1, characterized in that the wood filler includes at least one of wood powder, bamboo powder and plant straw powder. 4. The production process of continuous fiber prepreg mesh fabric reinforced wood-plastic material according to claim 1, characterized in that the first thermoplastic resin and the second thermoplastic resin can be blended with each other. 5. The production process of continuous fiber prepreg mesh fabric reinforced wood plastic material according to claim 4, characterized in that the first thermoplastic resin includes polyethylene, polypropylene, polyamide, polyphenylene sulfide or at least one of polyetheretherketone; and/or The second thermoplastic resin includes at least one of polyethylene, polypropylene, polyamide, polyphenylene sulfide or polyether ether ketone. 6. The production process of continuous fiber prepreg mesh fabric reinforced wood plastic material according to claim 1, characterized in that the co-extrusion mold is provided with an injection port, and the step three further includes: the second Thermoplastic resin and the wood filler are added into the co-extrusion die from the injection port. 7. The production process of continuous fiber pre-impregnated mesh fabric reinforced wood plastic material according to claim 1, characterized in that the step two further includes introducing at least two layers of the mesh fabric into the said mesh fabric at predetermined intervals. Co-extrusion mold. 8. The production process of continuous fiber prepreg mesh fabric reinforced wood-plastic materials according to claim 1, characterized in that the mesh size of the mesh fabric is 2 to 20 mm. 9. The production process of continuous fiber pre-impregnated mesh fabric reinforced wood-plastic material according to any one of claims 1 to 8, characterized in that the step one also includes: before the pre-impregnation process, The continuous fiber is coated with grafting agent. 10. A continuous fiber prepreg mesh fabric-reinforced wood-plastic board, characterized in that it is produced by the production process of a continuous fiber prepreg mesh fabric-reinforced wood-plastic material according to any one of claims 1 to 9.