High-strength glass fiber pipe with paint-free and high-gloss surface

Abstract

The utility model discloses a high-strength glass fiber pipe with a paint-free and highlight surface, which is characterized in that the pipe wall of the glass fiber pipe comprises an inner PET (polyethylene terephthalate) cloth layer, a middle structure layer and an outer PET cloth layer from inside to outside, the middle structure layer comprises a resin layer formed through a compression molding process and glass fiber filaments distributed in the resin layer or a plurality of glass fiber rods penetrating through the resin layer and extending in the axial direction, and pores of the outer PET cloth layer are filled with resin permeating outwards in the compression molding process; pores of the inner PET cloth layer are filled with resin which permeates inwards in the mold pressing process. During forming, part of resin of the resin layer penetrates through and fills pores of the outer PET cloth layer and the inner PET cloth layer, so that the surface smoothness is improved; by means of the colors of the outer PET cloth layer and the inner PET cloth layer, surface processing is not needed, the bottom exposure phenomenon is avoided, the production steps are simplified, the production efficiency is improved, and the production cost is reduced; and the resin penetrates through the outer PET cloth layer and the inner PET cloth layer to form an interlocking structure, so that the interlayer peeling strength is improved, and layering is prevented.

Description

Technical Field

[0001] This utility model relates to the field of glass fiber tube technology, and in particular to a high-strength glass fiber tube with a high-gloss, paint-free surface. Background Technology

[0002] Fiberglass tubes are rod-shaped materials composed of fiberglass and a resin matrix. They are characterized by high strength and strong corrosion resistance, and are widely used in various fields such as sporting goods, industrial equipment, electronics, and aerospace. Traditionally, fiberglass tubes require surface treatment after molding, including painting and coloring to improve surface smoothness. Common methods include spraying and baking. Spraying is simple and efficient, but results in a rough surface and low smoothness. Baking, on the other hand, provides a higher surface smoothness, but requires surface pretreatment, is complex, has poor environmental performance, and is costly. Both processes carry the risk of delamination; prolonged use can easily lead to delamination and exposure of the underlying fiberglass and resin matrix. Therefore, improvements are necessary. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a high-strength glass fiber tube with a high-gloss, paint-free surface that eliminates the need for painting and coloring, prevents the substrate from showing through, eliminates the need for surface treatment, improves surface smoothness, and reduces production costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a high-strength glass fiber tube with a high-gloss, paint-free surface, wherein the tube wall comprises, from the inside out, an inner PET fabric layer, a middle structural layer, and an outer PET fabric layer.

[0005] The intermediate structural layer includes a resin layer formed by a molding process and glass fiber filaments or multiple axially extending glass fiber rods distributed within the resin layer.

[0006] The pores of the outer PET fabric layer are filled with resin that permeates outward during the molding process.

[0007] The pores of the inner PET fabric layer are filled with resin that has penetrated inward during the molding process.

[0008] In a further technical solution, the intermediate structural layer consists only of a resin layer formed by a molding process and glass fiber filaments distributed within the resin layer, with the glass fiber filaments crisscrossing.

[0009] In a further technical solution, the intermediate structural layer consists only of a resin layer formed by a molding process and multiple axially extending glass fiber rods inserted within the resin layer.

[0010] In a further technical solution, the cross-sectional shape of the high-strength glass fiber tube is annular, and the glass fiber filaments or glass fiber rods in the intermediate structural layer are evenly distributed at equal intervals along the circumference.

[0011] In a further technical solution, a groove extending axially is provided on the outer side of the high-strength glass fiber tube wall, and the number of glass fiber filaments or glass fiber rods in the intermediate structural layer on one side of the groove is greater than the number of glass fiber filaments or glass fiber rods in the intermediate structural layer on the opposite side of the groove.

[0012] In a further technical solution, the outer PET fabric layer is a PET fabric layer that has been soaked in liquid resin solution.

[0013] In a further technical solution, the inner PET fabric layer is a PET fabric layer that has been soaked in liquid resin solution.

[0014] In a further technical solution, an outer resin protective layer is provided on the outside of the outer PET fabric layer.

[0015] In a further technical solution, an inner resin protective layer is provided on the outer side of the inner PET fabric layer.

[0016] The advantages of this invention compared to existing technologies are as follows: By wrapping the outer and inner sides of the intermediate structural layer with outer and inner PET fabric layers respectively, the resin layer in the intermediate structural layer is compressed during molding, and some resin penetrates and fills the pores of the outer and inner PET fabric layers, thereby improving the surface smoothness of the inner and outer walls of the high-strength glass fiber tube, achieving a roughness Ra≤0.6μm. By using outer and inner PET fabric layers of different colors, the high-strength glass fiber tube can present different colors, eliminating the need for surface processing such as spraying or baking paint. This not only avoids the appearance of exposed substrate but also simplifies production steps, improves production efficiency, and reduces production costs. Furthermore, some resin in the resin layer penetrates the outer and inner PET fabric layers to form an interlocking structure, increasing the interlayer peel strength by more than 20% and preventing delamination during prolonged use. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the high-strength glass fiber tube with a circular cross-sectional shape according to this utility model;

[0019] Figure 2 This is a cross-sectional view of the high-strength glass fiber tube of this utility model, which has a circular annular cross-section.

[0020] Figure 3This is a schematic diagram of the structure of the high-strength glass fiber tube of this utility model, which has a groove on the outside of the tube wall;

[0021] Figure 4 This is a cross-sectional view of the groove on the outer side of the high-strength glass fiber tube of this utility model.

[0022] In the picture:

[0023] 1 Inner PET fabric layer, 2 Middle structural layer, 3 Outer PET fabric layer, 4 Tank body. Detailed Implementation

[0024] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0025] A high-strength fiberglass tube with a high-gloss, paint-free surface, such as Figures 1 to 4 As shown, the wall of the glass fiber tube includes an inner PET cloth layer 1, an intermediate structural layer 2, and an outer PET cloth layer 3 from the inside out. The intermediate structural layer 2 includes a resin layer formed by a molding process and glass fiber filaments or multiple axially extending glass fiber rods distributed in the resin layer. The pores of the outer PET cloth layer 3 are filled with resin that permeates outward during the molding process, and the pores of the inner PET cloth layer 1 are filled with resin that permeates inward during the molding process.

[0026] Traditional fiberglass tubes require surface treatments such as spray painting and baking after molding to color and improve surface smoothness. Spray painting can lead to paint cracking and exposed substrate after prolonged bending, and it is also prone to bubbles and impurities, resulting in poor surface smoothness. Baking is complex, costly, and environmentally unfriendly, and both processes are prone to delamination over time. This invention, however, uses an outer PET fabric layer 3 and an inner PET fabric layer 1 to wrap the outer and inner sides of the intermediate structural layer 2, respectively. During molding, the resin layer in the intermediate structural layer 2 is compressed, and some resin penetrates and fills the pores of the outer PET fabric layer 3 and the inner PET fabric layer 1, thereby enhancing the high-strength fiberglass... The surface smoothness of the inner and outer walls of the vascular bundle ensures a roughness Ra≤0.6μm. By using outer PET cloth layer 3 and inner PET cloth layer 1 of different colors, the high-strength glass fiber tube can be made to have different colors, eliminating the need for surface processing through spray painting or baking paint, simplifying the production steps, improving production efficiency, and reducing production costs. The surface of the glass fiber tube after surface treatment using traditional baking paint process forms a paint layer, which is prone to cracking or unevenness, resulting in the exposure of the substrate. However, in this invention, there is no exposure of the substrate. Part of the resin in the resin layer penetrates through the outer PET cloth layer 3 and inner PET cloth layer 1 to form an interlocking structure, increasing the interlayer peel strength by more than 20% and preventing delamination after long-term use.

[0027] Specifically, the intermediate structural layer 2 consists only of a resin layer formed by a molding process and glass fiber filaments distributed within the resin layer, with the glass fiber filaments interwoven. The glass fiber filaments are tightly connected to the resin layer, increasing toughness and improving bending resistance.

[0028] Specifically, the intermediate structural layer 2 consists only of a resin layer formed by a molding process and multiple axially extending glass fiber rods inserted within the resin layer. The axially extending glass fiber rods enhance the strength and hardness of the high-strength glass fiber tube.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the high-strength glass fiber tube has a circular cross-sectional shape, and the glass fiber filaments or glass fiber rods in the intermediate structural layer 2 are evenly distributed at equal intervals along the circumference. The high-strength glass fiber tube is circular in shape, and the glass fiber filaments or glass fiber rods are evenly distributed to improve the uniformity of the tube wall strength.

[0030] Specifically, such as Figure 3 and Figure 4 As shown, the outer side of the high-strength glass fiber tube has an axially extending groove 4. The number of glass fiber filaments or glass fiber rods in the intermediate structural layer 2 on one side of the groove 4 is greater than the number of glass fiber filaments or glass fiber rods in the intermediate structural layer 2 on the opposite side of the groove 4. By setting the groove 4, the application range of the high-strength glass fiber tube is expanded. Due to the setting of the groove 4, the thickness of the intermediate structural layer 2 on one side of the groove 4 is reduced. By increasing the number of glass fiber filaments or glass fiber rods on one side of the groove 4, the uniformity of the strength of the tube wall of the high-strength glass fiber tube is improved, avoiding natural bending of the high-strength glass fiber and increasing its strength.

[0031] Specifically, the outer PET fabric layer 3 is a PET fabric layer soaked in liquid resin. Before molding the high-strength glass fiber tube, the outer PET fabric layer 3 is first soaked in liquid resin, so that the liquid resin pre-fills the pores of the outer PET fabric layer 3, and then wraps the outer side of the middle structural layer 2. During molding, the filling rate of the resin on the outer PET fabric layer 3 is increased, avoiding the generation of air bubbles and gaps, and further improving the surface smoothness and strength.

[0032] Specifically, the inner PET fabric layer 1 is a PET fabric layer soaked in liquid resin. Before molding the high-strength glass fiber tube, the inner PET fabric layer 1 is first soaked in liquid resin, so that the liquid resin pre-fills the pores of the inner PET fabric layer 1, and then wraps the inner side of the intermediate structural layer 2. During molding, the filling rate of the resin in the inner PET fabric layer 1 is increased, avoiding the generation of air bubbles and gaps, and further improving the surface smoothness and strength.

[0033] Specifically, an outer resin protective layer is provided on the outer side of the outer PET fabric layer 3. During the molding process, some of the resin in the resin layer penetrates outward through the outer PET fabric layer 3 and covers the outer side of the outer PET fabric layer 3 to form an outer resin protective layer. The outer resin protective layer protects the outer surface of the high-strength glass fiber tube and further improves the surface smoothness.

[0034] Specifically, an inner resin protective layer is provided on the outer side of the inner PET fabric layer 1. During the molding process, part of the resin in the resin layer penetrates inward through the inner PET fabric layer 1 and covers the outer side of the inner PET fabric layer 1 to form an inner resin protective layer. The inner surface of the high-strength glass fiber tube is protected by the inner resin protective layer, and the surface smoothness is further improved.

[0035] PET fabric layers possess high strength and fatigue resistance. The fibers in PET fabric layers have high tensile strength, with tensile properties superior to most natural fibers, and are resistant to repeated bending and tensile fatigue, thereby further improving structural strength. It also exhibits chemical corrosion resistance, showing good resistance to weak acids, weak alkalis, and organic solvents such as ethanol, gasoline, and greases, making it suitable for use in corrosive environments such as chemical plants and marine environments, extending its service life. Furthermore, it has high-temperature resistance, with a melting point of approximately 250-260℃ and a glass transition temperature of approximately 70℃, allowing for long-term stable use within a temperature range of -40℃ to 150℃, and can adapt to resin curing. It also possesses low hygroscopicity, porosity, and permeability, with a moisture absorption rate of only 0.4%, far lower than nylon and cotton, making it less prone to expansion and deformation in humid environments, ensuring interlayer bonding stability. During the molding process, low hygroscopicity ensures that the outer PET fabric layer 3 and the inner PET fabric layer 1 do not absorb resin, ensuring that the resin can pass through the outer PET fabric layer 3 and the inner PET fabric layer 1 to form an outer resin protective layer and an inner resin protective layer. Simultaneously, the PET fabric itself has high surface smoothness, further improving the surface smoothness of the glass fiber tube.

[0036] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-strength glass fiber tube with a high-gloss, paint-free surface, characterized in that: The wall of the fiberglass tube consists of an inner PET fabric layer (1), a middle structural layer (2), and an outer PET fabric layer (3) from the inside out. The intermediate structural layer (2) includes a resin layer formed by a molding process and glass fiber filaments or multiple axially extending glass fiber rods distributed in the resin layer. The pores of the outer PET fabric layer (3) are filled with resin that permeates outward during the molding process. The pores of the inner PET fabric layer (1) are filled with resin that has penetrated into the interior during the molding process.

2. The high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The intermediate structural layer (2) consists only of the resin layer formed by the molding process and the glass fiber filaments distributed in the resin layer, with the glass fiber filaments crisscrossing.

3. The high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The intermediate structural layer (2) consists only of the resin layer formed by a molding process and a plurality of glass fiber rods extending axially through the resin layer.

4. The high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The cross-sectional shape of the high-strength glass fiber tube is circular, and the glass fiber filaments or glass fiber rods in the intermediate structural layer (2) are evenly distributed at equal intervals along the circumferential direction.

5. The high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The high-strength glass fiber tube has an axially extending groove (4) on the outer side of its tube wall. The number of glass fiber filaments or glass fiber rods in the intermediate structural layer (2) on the side where the groove (4) is located is greater than the number of glass fiber filaments or glass fiber rods in the intermediate structural layer (2) on the opposite side of the groove (4).

6. The high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The outer PET fabric layer (3) is a PET fabric layer that has been soaked in liquid resin.

7. A high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: The inner PET fabric layer (1) is a PET fabric layer that has been soaked in liquid resin.

8. A high-strength glass fiber tube with a high-gloss, paint-free surface according to claim 1, characterized in that: An outer resin protective layer is provided on the outside of the outer PET fabric layer (3).

9. A high-strength glass fiber tube with a paint-free, high-gloss surface according to claim 1, characterized in that: An inner resin protective layer is provided on the outer side of the inner PET fabric layer (1).

Images