A flexible resin guide belt

Abstract

The utility model relates to a kind of flexible resin flow guide tape, the flexible resin flow guide tape includes wave-shaped flow guide net layer and surface felt layer, the surface felt layer is set in the upper and lower two surfaces of the wave-shaped flow guide net layer, and the surface felt layer is also set in the two side surfaces of the wave-shaped flow guide net layer opposite to each other;The wave-shaped flow guide net layer includes wave-shaped flow guide net;The wave-shaped flow guide net has continuous wave-shaped convex arrangement of flow guide fiber composition;The ratio of the average wave height and average wavelength of the wave-shaped flow guide net is 1:(0.5~1.5).Flexible resin flow guide tape provided by the utility model has the advantages of being bendable, not easy to compress, easy to lay, easy to demould after pouring is finished.

Description

Technical Field

[0001] This utility model relates to the field of vacuum infusion technology, and in particular to a flexible resin guide belt. Background Technology

[0002] In the vacuum infusion process, the role of flow guide products is crucial, as they directly affect the resin flow path, impregnation efficiency, and the quality of the final product.

[0003] CN105196572A discloses a vacuum infusion guide tube and its preparation method. The vacuum infusion guide tube includes a guide tube body, and a base plate is provided at the bottom of the guide tube body. The base plate and the guide tube body are integrally formed to form a hollow whole. The base plate is provided with a plurality of guide holes at equal intervals along the extension direction of the guide tube body. The vacuum infusion guide tube provided by this technical solution has the advantages of preventing imprints and high-speed resin flow.

[0004] CN207388344U discloses a detachable vacuum injection guide tube, which includes an upper cover and a lower base plate. Both the upper cover and the lower base plate are elongated. The upper cover is mounted on the lower base plate, forming an injection cavity. The upper cover has snap-fit ​​teeth on both sides, and the lower base plate has snap-fit ​​grooves on both sides. The two ends of the snap-fit ​​grooves extend to the two ends of the lower base plate. The upper cover is movably inserted into the snap-fit ​​grooves of the lower base plate through the snap-fit ​​teeth. The lower base plate has multiple flow guide holes. This detachable vacuum injection guide tube provides good flow guidance, prevents imprints, and is easy to clean.

[0005] Currently, most injection molding processes use various shaped guide tubes for resin flow. However, these guide tubes are mostly tubular structures such as ohmic tubes or triangular tubes, and are often made of rigid materials, making them impossible to bend, which is not conducive to storage and transportation. Their length is limited by transportation, and each tube is relatively short. Before injection, each guide tube needs to be placed individually, and the joints need to be protected with spray adhesive and breathable felt to prevent puncturing the vacuum bag film of another injection process material. The laying process is relatively complicated and can easily cause product quality defects or even scrap. The resin seeps into the micropores or spiral grooves on the surface of the guide tube, and after curing, it easily forms mechanical locks that are difficult to demold.

[0006] Therefore, there is a need to develop a flexible guide product that is easier to transport and use. Utility Model Content

[0007] To solve the above-mentioned technical problems, this utility model provides a flexible resin guide strip, which has the advantages of being bendable, not easily compressed, easy to lay, and easy to demold after pouring.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] This invention provides a flexible resin guide belt, comprising a corrugated guide mesh layer and a surface felt layer. The surface felt layer is disposed on the upper and lower surfaces of the corrugated guide mesh layer, and also on the two opposing side surfaces of the corrugated guide mesh layer. The corrugated guide mesh layer comprises a corrugated guide mesh. The corrugated guide mesh has a continuous arrangement of corrugated protrusions composed of guide fibers. The ratio of the average wave height to the average wavelength of the corrugated guide mesh is 1:(0.5~1.5), for example, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1.0, 1:1.1, 1:1.2, 1:1.3, or 1:1.4, etc.

[0010] In this invention, the corrugated flow guide net has a continuous arrangement of corrugated protrusions made of flow guide fibers, which can form a channel space for resin to flow through. The corrugated flow guide net is designed with a corrugated structure, which can replace overall bending through local deformation, enabling rigid materials to achieve flexibility on a macroscopic scale or further increasing the macroscopic flexibility of flexible materials. By setting a surface felt layer on the upper and lower surfaces of the corrugated flow guide net layer, and also setting the surface felt layer on the two opposing side surfaces of the corrugated flow guide net layer, it can protect the corrugated flow guide net layer during daily transportation and facilitate demolding after pouring. The flexible resin flow guide strip can be used to replace the traditional flow guide tube in the pouring molding process for resin flow guidance, effectively improving the problem that the traditional flow guide tube cannot be bent, and is easier to store and transport, easier to lay, and easier to demold after pouring.

[0011] In this invention, the average wave height refers to the average vertical distance between the crests and troughs in the wave-shaped guide net; the average wavelength refers to the average horizontal distance between the crests and troughs in the wave-shaped guide net; the crest refers to the position of the highest point in a single wave band in the wave-shaped guide net, and the trough refers to the position of the lowest point in a single wave band. The ratio of the average wave height to the average wavelength of the wave-shaped guide net is preferably 1:(0.5~1.5). If the ratio is too high, the bending performance of the wave-shaped guide net will deteriorate, increasing the difficulty of transportation and storage; if the ratio is too low, the injection speed will be too slow, the strength insufficient, and the height direction will be easily compressed under vacuum, making it impossible to maintain a three-dimensional structure under vacuum pressure.

[0012] Preferably, the corrugated guide net is any one of corrugated polyethylene guide net, corrugated polypropylene guide net, or corrugated nylon guide net.

[0013] In this invention, the corrugated guide net can be prepared using existing manufacturing processes, without any special limitations. For example, the corrugated guide net can be prepared by a spinning process.

[0014] In this invention, the corrugated guide net is made of polyethylene, polypropylene or nylon, which can achieve good bending performance.

[0015] Preferably, the average wave height of the corrugated guide net is 2 to 10 mm, such as 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 9 mm.

[0016] Preferably, the average wavelength of the wave-shaped guide net is 1 to 15 mm, such as 3 mm, 5 mm, 7 mm, 9 mm, 11 mm or 13 mm.

[0017] Preferably, the guiding fibers comprise flat filaments and / or round filaments.

[0018] Preferably, the thickness of the flat wire is 0.5-2mm (e.g., 0.7mm, 0.9mm, 1.1mm, 1.3mm, 1.5mm, 1.7mm or 1.9mm, etc.), and the width is 0.5-3mm, e.g., 0.8mm, 1.1mm, 1.4mm, 1.7mm, 2.0mm, 2.3mm, 2.6mm or 2.9mm, etc.

[0019] Preferably, the diameter of the round wire is 0.5 to 2 mm, such as 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm, 1.7 mm or 1.9 mm.

[0020] Preferably, the ratio of the average wave height of the corrugated guide net to the diameter of the round wire or the thickness of the flat wire is 1:(0.1 to 0.4), for example, 1:0.13, 1:0.16, 1:0.19, 1:0.22, 1:0.25, 1:0.28, 1:0.31, 1:0.34 or 1:0.37, and more preferably 1:(0.2 to 0.35).

[0021] In this invention, the ratio of the average wave height of the corrugated guide net to the diameter of the round filament guide fiber or the thickness of the flat filament guide fiber is preferably 1:(0.1~0.4). If the ratio is too high, the corrugated guide net will be insufficient in strength, and the flexible resin guide belt will be easily compressed under vacuum, which is not conducive to maintaining a three-dimensional structure under vacuum pressure. If the ratio is too low, the injection speed will be slow.

[0022] Preferably, the weight of the corrugated guide net is 50–500 g / m³. 2 For example, 100g / m 2 150g / m 2200g / m 2 250g / m 2 300g / m 2 350g / m 2 400g / m 2 Or 450g / m 2 wait.

[0023] In this invention, the weight of the corrugated guide net is preferably 50-500 g / m³. 2 If the basis weight of the corrugated flow guide net is too high, the distribution density of flat filament flow guide fibers and / or round filament flow guide fibers in the corrugated flow guide net will be high, which will lead to problems such as slow resin flow speed and poor bending performance. If the basis weight of the corrugated flow guide net is too low, the distribution density of flat filament flow guide fibers and / or round filament flow guide fibers in the corrugated flow guide net will be low, which will lead to insufficient strength of the corrugated flow guide net, and the flexible resin flow guide belt will be easily compressed under vacuum, or even unable to conduct flow.

[0024] In this invention, the connection method of the surface felt layer is not specifically limited, and it can be connected by pressure-sensitive adhesive or water-based adhesive.

[0025] Preferably, the surface felt layer is a polyester surface felt and / or a glass fiber surface felt.

[0026] Preferably, the polyester surface felt is any one or a combination of at least two of polyethylene terephthalate surface felt, polybutylene terephthalate surface felt, or polypropylene terephthalate surface felt.

[0027] Preferably, the basis weight of the polyester surface felt is 15–50 g / m². 2 For example, 20g / m 2 25g / m 2 30g / m 2 35g / m 2 40g / m 2 Or 45g / m 2 wait.

[0028] Preferably, the basis weight of the glass fiber surface mat is 30–100 g / m². 2 For example, 40g / m 2 50g / m 2 60g / m 2 70g / m 2 80g / m 2 or 90g / m 2 wait.

[0029] Preferably, the thickness of the surface felt layer is 20 to 100 μm, such as 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm or 90 μm.

[0030] Preferably, the width of the flexible resin guide strip is 50-400mm, such as 100mm, 150mm, 200mm, 250mm, 300mm or 350mm.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects:

[0032] In this invention, a surface felt layer is disposed on the upper and lower surfaces of the corrugated flow guide net layer, and the surface felt layer is also disposed on the two opposing side surfaces of the corrugated flow guide net layer. The corrugated flow guide net layer includes a corrugated flow guide net, and the ratio of the average wave height to the average wavelength of the corrugated flow guide net is 1:(0.5~1.5). It is flexible, not easily compressed, easy to lay, and easy to demold after pouring. It has the advantages of fast pouring speed and can be used to replace the traditional flow guide tube in the pouring molding process for resin flow. It can effectively solve the problems of traditional flow guide tubes being unable to be bent, having a relatively complex laying process, and being difficult to demold. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the cross-sectional structure of the flexible resin guide strip provided in Example 1;

[0034] Among them, 1-surface felt layer; 2-corrugated flow guiding mesh layer;

[0035] Figure 2 This is a photograph of the corrugated polyethylene flow guide net wrapped with polyethylene terephthalate surface felt during the preparation process of the corrugated flow guide net in Example 1;

[0036] Figure 3 This is a physical image of the wave-shaped guide net provided in Example 1. Detailed Implementation

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. However, the following examples are merely simplified examples of this utility model and do not represent or limit the scope of protection of this utility model. The scope of protection of this utility model is determined by the claims.

[0038] Example 1

[0039] This embodiment provides a flexible resin guide strip, such as... Figure 1As shown, the flexible resin guide belt includes a surface felt layer 1 and a corrugated guide net layer 2. The surface felt layer 1 is disposed on the upper and lower surfaces of the corrugated guide net layer 2, and the surface felt layer 1 is also disposed on the two opposing side surfaces of the corrugated guide net layer 2.

[0040] The surface felt layer 1 is a polyethylene terephthalate (PET) surface felt, with a thickness of 50 μm and a basis weight of 20 g / m². 2 .

[0041] The corrugated flow guide layer 2 is a corrugated polyethylene flow guide mesh; the corrugated polyethylene flow guide mesh has a continuous corrugated protrusion arrangement composed of flow guide fibers, the average wave height of the corrugated polyethylene flow guide mesh is 5mm, the average wavelength is 5mm, the ratio of average wave height to average wavelength is 1:1, and the basis weight is 100g / m³. 2 The guiding fiber is a round filament with a diameter of 1.0 mm.

[0042] The width of the flexible resin guide strip is 100mm.

[0043] The flexible resin guide strip is prepared by the following method: polyethylene terephthalate surface felt is bent, and a corrugated polyethylene guide net (such as...) is wrapped around it. Figure 2 As shown), water-based adhesive (manufacturer 3M, brand name Fastbond) is used. TM The 2000NF coating is applied with a width of 5 mm and a coating amount of 10 g / m². 2 The flexible resin guide strip (such as...) was prepared. Figure 3 (As shown).

[0044] Example 2

[0045] This embodiment provides a flexible resin guide strip, which includes a surface felt layer and a corrugated guide net layer. The surface felt layer is disposed on the upper and lower surfaces of the corrugated guide net layer, and the surface felt layer is also disposed on the two opposing side surfaces of the corrugated guide net layer.

[0046] The surface felt layer is a polyethylene terephthalate (PET) surface felt, with a thickness of 20 μm and a basis weight of 15 g / m². 2 .

[0047] The corrugated flow guiding mesh layer is a corrugated polypropylene flow guiding mesh, which has a continuous corrugated arrangement of flow guiding fibers. The average wave height of the corrugated polypropylene flow guiding mesh is 2 mm, the average wavelength is 1 mm, the ratio of average wave height to average wavelength is 1:0.5, and the basis weight is 50 g / m³. 2The guiding fiber is a round filament with a diameter of 0.7 mm.

[0048] The width of the flexible resin guide strip is 100mm.

[0049] The flexible resin guide strip is prepared by the following method: polyethylene terephthalate surface felt is bent, and a corrugated polypropylene guide net is wrapped in the middle, using water-based adhesive (manufacturer 3M, brand Fastbond). TM The 2000NF coating is applied with a width of 8 mm and a coating amount of 15 g / m². 2 The flexible resin guide strip was prepared.

[0050] Example 3

[0051] This embodiment provides a flexible resin guide strip, which includes a surface felt layer and a corrugated guide net layer. The surface felt layer is disposed on the upper and lower surfaces of the corrugated guide net layer, and the surface felt layer is also disposed on the two opposing side surfaces of the corrugated guide net layer.

[0052] The surface felt layer is a polyethylene terephthalate (PET) surface felt, with a thickness of 65 μm and a basis weight of 30 g / m². 2 .

[0053] The corrugated flow guide mesh layer is a corrugated nylon flow guide mesh made of nylon 66. The corrugated nylon flow guide mesh has a continuous corrugated arrangement of flow guide fibers. The average wave height is 4 mm, the average wavelength is 5 mm, the ratio of average wave height to average wavelength is 1:1.25, and the basis weight is 80 g / m³. 2 The guiding fiber is a round filament with a diameter of 1.0 mm.

[0054] The width of the flexible resin guide strip is 100mm.

[0055] The flexible resin guide belt is prepared by the following method: polyethylene terephthalate surface felt is bent, and a corrugated nylon guide mesh is wrapped in the middle, using water-based adhesive (manufacturer 3M, brand Fastbond). TM The 2000NF coating is applied with a width of 10mm and a coating amount of 15g / m². 2 The flexible resin guide strip was prepared.

[0056] Example 4

[0057] This embodiment provides a flexible resin guide strip, which includes a surface felt layer and a corrugated guide net layer. The surface felt layer is disposed on the upper and lower surfaces of the corrugated guide net layer, and the surface felt layer is also disposed on the two opposing side surfaces of the corrugated guide net layer.

[0058] The surface mat layer is a glass fiber surface mat with a thickness of 50 μm and a basis weight of 60 g / m². 2 .

[0059] The corrugated flow guide mesh layer is a corrugated nylon flow guide mesh made of nylon 66. The corrugated nylon flow guide mesh has a continuous corrugated arrangement of flow guide fibers. The average wave height is 9 mm, the average wavelength is 13 mm, the ratio of average wave height to average wavelength is 1:1.44, and the basis weight is 300 g / m³. 2 The guiding fiber is a round filament with a diameter of 1.8 mm.

[0060] The width of the flexible resin guide strip is 100mm.

[0061] The flexible resin guide belt is prepared by the following method: glass fiber surface felt is bent, and a corrugated nylon guide mesh is wrapped in the middle, using water-based adhesive (manufacturer 3M, brand Fastbond). TM The 2000NF coating is applied with a width of 6 mm and a coating amount of 10 g / m². 2 The flexible resin guide strip was prepared.

[0062] Example 5

[0063] This embodiment provides a flexible resin guide belt, which differs from Embodiment 1 only in that the diameter of the round wire is adjusted to 0.5 mm, while other conditions are the same as in Embodiment 1.

[0064] Comparative Example 1

[0065] This comparative example provides a flexible resin guide belt, which differs from Example 1 only in that it does not have a surface felt layer. The flexible resin guide belt is a corrugated polyethylene guide mesh, which has a continuous arrangement of corrugated protrusions composed of guide fibers. The average wave height of the corrugated polyethylene guide mesh is 5 mm, the average wavelength is 5 mm, and the basis weight is 100 g / m². 2 The guiding fiber is a round filament with a diameter of 1.0 mm.

[0066] Comparative Example 2

[0067] This comparative example provides a flexible resin guide belt, which differs from Example 1 only in that the average wavelength of the corrugated polyethylene guide net is adjusted to 12 mm, the ratio of average wave height to average wavelength is 1:2.4, and other conditions are the same as in Example 1.

[0068] Comparative Example 3

[0069] This comparative example provides a flexible resin guide belt, which differs from Example 1 only in that the average wavelength of the corrugated polyethylene guide net is adjusted to 2 mm, and the ratio of average wave height to average wavelength is 1:0.4. Other conditions are the same as in Example 1.

[0070] The following performance tests were conducted on the flexible resin guide strips provided in Examples 1-5 and Comparative Examples 1-3.

[0071] (1) Bending performance: A flexible resin guide strip with a width of 100mm and a length of 1m is bent along its length to form a 120° angle. After the flexible resin guide strip naturally recovers, the angle difference from the initial position is observed. If the angle difference is ≤10°, it is considered to be able to recover to its original state and has good bending performance; if the angle difference is >10°, it is considered to be unable to recover and has poor bending performance.

[0072] (2) Compression resistance: The flexible resin guide belt is laid flat on the steel plate, then placed in a sealed bag, vacuumed to 0.7MPa, placed in an oven at 60℃ for 2 hours, and observed for any obvious deformation.

[0073] (3) Demolding effect: Five layers of fiberglass cloth are laid on the steel plate, and a release film and a flexible resin guide belt are placed on top in sequence. Then, it is placed in a sealed bag and a resin mixture of epoxy resin (LT-5078A) and curing agent (LT5078B) with a mass ratio of 100:30 is poured in. After curing, the demolding is observed to see if it can be completely demolded and whether there is any residue.

[0074] (4) Injection speed: Place a flexible resin guide belt with a width of 100mm and a length of 250mm in a vacuum bag and fix it on the platform. Then inject the resin mixture at one end and let the resin mixture flow out at the other end. The resin mixture is epoxy resin (LT-5078A) and curing agent (LT5078B) with a mass ratio of 100:30. Count the weight of the resin mixture injected within one minute after stabilization.

[0075] The test results are shown in Table 1.

[0076] Table 1

[0077]

[0078]

[0079] In Table 1, " / " indicates that the test was not performed.

[0080] According to the test results in Table 1, it can be seen from Examples 1 to 4 that the flexible resin guide belt of this utility model can achieve the technical effects of fast injection speed, easy demolding, bendability, and resistance to compression in the height direction.

[0081] Compared with Example 1, if the ratio of the average wave height of the corrugated guide net to the diameter of the round wire or the thickness of the flat wire is higher (Example 5), the deformation under vacuum increases, the structural stability under vacuum pressure is poor, and the injection speed decreases.

[0082] Compared to Example 1, if the flexible resin guide strip does not include the surface felt layer (Comparative Example 1), it cannot be successfully demolded after injection.

[0083] Compared with Example 1, if the ratio of average wave height to average wavelength is too small (Comparative Example 2), the strength of the wave-shaped guide net will be insufficient, the flexible resin guide strip will not be able to maintain a three-dimensional structure under vacuum pressure, and it will be easily compressed in the height direction, which will seriously affect the guide speed.

[0084] Compared to Example 1, if the ratio of average wave height to average wavelength is too large (Comparative Example 3), the bending performance of the flexible resin guide strip will deteriorate.

[0085] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A flexible resinous carrier tape, characterized by, The flexible resin guide belt includes a corrugated guide mesh layer and a surface felt layer. The surface felt layer is disposed on the upper and lower surfaces of the corrugated guide mesh layer, and the surface felt layer is also disposed on the two opposing side surfaces of the corrugated guide mesh layer. The corrugated guide mesh layer includes a corrugated guide mesh. The corrugated guide mesh has a continuous arrangement of corrugated protrusions composed of guide fibers. The ratio of the average wave height to the average wavelength of the wave-shaped guide net is 1:(0.5 to 1.5).

2. The flexible resin guide strip according to claim 1, wherein The corrugated guide net is any one of corrugated polyethylene guide net, corrugated polypropylene guide net, or corrugated nylon guide net.

3. The flexible resin guide strip of claim 1, wherein, The average wave height of the wave-shaped guide net is 2–10 mm; The average wavelength of the wave-shaped guide net is 1 to 15 mm.

4. The flexible resin guide strip of claim 1, wherein, The guiding fibers include flat filaments and / or round filaments; The thickness of the flat wire is 0.5–2 mm, and the width is 0.5–3 mm; The diameter of the round wire is 0.5 to 2 mm.

5. The flexible resin guide strip of claim 4, wherein, The ratio of the average wave height of the corrugated guide net to the diameter of the round wire or the thickness of the flat wire is 1:(0.1~0.4).

6. The flexible resin guide strip of claim 1, wherein The wave-shaped guide net has a grammage of 50-500 g / m 2 .

7. The flexible resin guide strip of claim 1, wherein The surface felt layer is a polyester surface felt and / or a glass fiber surface felt; The polyester surface mat is any one or a combination of at least two of polyethylene terephthalate surface mat, polybutylene terephthalate surface mat, or polypropylene terephthalate surface mat.

8. The flexible resin guide strip of claim 7, wherein, The polyester surface felt has a grammage of 15-50 g / m 2 ; The glass fiber surface mat has a grammage of 30-100 g / m 2 .

9. The flexible resin guide strip of claim 1, wherein, The thickness of the surface felt layer is 20–100 μm.

10. The flexible resin guide strip of claim 1, wherein, The width of the flexible resin guide strip is 50–400 mm.

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