Waterproof terylene tarpaulin

Abstract

The utility model relates to the technical field of tarpaulin, and discloses waterproof terylene tarpaulin, which is characterized in that terylene base cloth and PU waterproof layers on the upper and lower surfaces of the terylene base cloth form a tarpaulin main body; the tear-resistant layer is clamped between the polyester base cloth and the PU waterproof layer; two sides of the hot melt adhesive layer A are respectively hot-pressed and bonded with the anti-tear layer and the polyester base cloth, and two sides of the hot melt adhesive layer B are respectively hot-pressed and bonded with the anti-tear layer and the PU waterproof layer; a flow guide groove for guiding water flow to be discharged along the groove to prevent accumulated water from permeating is formed in the outer surface of the hot melt adhesive layer B through pressing. The tear-resistant layer, the polyester base cloth and the PU waterproof layer are bonded together through the hot melt adhesive layer A and the hot melt adhesive layer B to form an integrated structure, the problem of needle hole water seepage caused by traditional sewing is avoided, and the problem of water accumulation of the tarpaulin is solved through the design of the flow guide grooves.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tarpaulin, specifically relates to a waterproof polyester tarpaulin. BACKGROUND

[0002] The waterproof polyester tarpaulin is widely used in the field of outdoor tent, truck tarpaulin and the like, and its waterproof function is mainly realized by coating PVC (polyvinyl chloride) or PU (polyurethane) waterproof material on the polyester base cloth. However, the existing tarpaulin technology faces various challenges, especially in terms of waterproofness, durability and air permeability.

[0003] The existing waterproof polyester tarpaulin usually has the following characteristics: using polyester base cloth as the main material to provide necessary strength and support. Coating PVC or PU waterproof material on one or both sides of the polyester base cloth to achieve waterproof effect. The tarpaulins are spliced together by sewing threads, and then the seams are usually sealed by using glue or heat sealing technology to prevent water penetration. Although the coating provides waterproof function, long-term wear and tear and ultraviolet radiation can cause the coating to break, reducing the waterproof effect.

[0004] The needle holes at the traditional sewn seams are prone to form water penetration channels, and even after later gluing, it is difficult to completely seal, leading to easy water penetration at the seams. The surface coating is prone to wear and tear after long-term use, especially at the folding and seam parts, which can cause the waterproof performance to decrease. In order to improve the waterproofness, it is often necessary to increase the thickness of the coating, which increases the weight of the tarpaulin and reduces the air permeability, affecting the comfort of use. The traditional seam treatment and production process are usually complicated and low in efficiency.

[0005] In view of this, a new type of waterproof polyester tarpaulin is proposed to solve the above problems. By introducing aramid fiber net as a tear-resistant layer, the tear-resistant ability of the tarpaulin is significantly improved without adding too much weight. Nano-silicon dioxide particles are added to the PU coating to improve the wear resistance and durability of the coating without affecting its flexibility and processing performance. The microporous structure in the bottom PU waterproof layer allows water vapor to escape and prevents liquid water from penetrating, improving the air permeability of the tarpaulin. The flow guide grooves pressed on the outer surface of the hot melt adhesive layer B help to quickly drain accumulated water and prevent water penetration, while improving production efficiency. SUMMARY

[0006] The present application aims to solve the technical problems of the existing technology, such as the needle holes at the traditional sewn seams being prone to form water penetration channels, poor waterproof performance, and the seam treatment and production process being usually complicated and low in efficiency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A waterproof polyester tarpaulin, comprising:

[0009] The terylene base cloth and the upper and lower PU waterproof layers form the tarpaulin main body;

[0010] The anti-tearing layer is clamped between the terylene base cloth and the PU waterproof layer;

[0011] The hot melt adhesive layer A and the hot melt adhesive layer B, the hot melt adhesive layer A is hot-pressed and bonded on both sides of the anti-tearing layer and the terylene base cloth respectively, and the hot melt adhesive layer B is hot-pressed and bonded on both sides of the anti-tearing layer and the PU waterproof layer respectively;

[0012] The outer surface of the hot melt adhesive layer B is pressed to form a flow guide groove for guiding water flow to flow out along the groove to avoid water penetration.

[0013] Preferably, the anti-tearing layer is an aramid fiber network.

[0014] Preferably, the PU waterproof layer on the surface is added with nano silicon dioxide particles for improving the overall wear resistance of the tarpaulin.

[0015] Preferably, the PU waterproof layer on the bottom layer is provided with a microporous structure allowing water vapor to pass through but preventing liquid water from penetrating, and the pore size of the micropore is 0.1-1 μm.

[0016] Preferably, the depth of the flow guide groove is 0.3-1 mm, and the interval is 1-3 mm.

[0017] Preferably, the flow guide grooves are arranged at equal distances and are V-shaped grooves with both ends open.

[0018] Preferably, the outer surface of the hot melt adhesive layer B is pressed to form outwardly convex and staggered arc-shaped protrusions, and the flow guide groove is surrounded by the arc-shaped protrusions around it.

[0019] Compared with the prior art, the technical effects and advantages of the utility model are:

[0020] The waterproof terylene tarpaulin is formed by hot melt adhesive layer A and hot melt adhesive layer B to bond the anti-tearing layer, the terylene base cloth and the PU waterproof layer together to form an integrated structure, avoiding the needle hole water penetration problem caused by traditional sewing.

[0021] The aramid fiber network as the anti-tearing layer can effectively disperse stress and prevent tear propagation at the joints and folds due to its high strength and high modulus characteristics. The addition of nano silicon dioxide particles improves the compactness and hardness of the coating through physical cross-linking, thereby enhancing the wear resistance. The microporous structure formed in the PU waterproof layer utilizes the capillary effect to realize one-way ventilation, allowing water vapor to be discharged while preventing liquid water from penetrating. The design of the flow guide groove utilizes the principle of gravity to accelerate water flow discharge and prevent water penetration.

[0022] The problem of water seepage at the joint is solved by hot melt adhesive bonding and the design of the flow guide groove. The addition of nano-silicon dioxide particles improves the wear resistance of the coating and prolongs the service life of the tarpaulin. The lightweight nature of the aramid fiber mesh ensures that the weight of the tarpaulin does not increase significantly due to the addition of the coating. The arrangement of the microporous structure maintains the waterproof performance while allowing water vapor to escape, improving the breathability of the tarpaulin and reducing internal condensation. The addition of the tear-resistant layer and nano-particles slows down the wear of the coating, making the tarpaulin have a longer service life.

[0023] The design is compatible with existing production lines and easy to implement on a large scale. The tarpaulin of this design is suitable for outdoor tents, truck tarpaulins and other scenarios that require high waterproofness and breathability. Overall, the design principle and benefits of this waterproof polyester tarpaulin represent a significant improvement over traditional tarpaulin technology, effectively addressing the trade-off between weight, breathability and durability, and have a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure diagram of the tarpaulin main body with a V-shaped groove of the utility model;

[0025] Figure 2 It is an exploded view of the utility model;

[0026] Figure 3 It is a structure diagram with an arc-shaped protrusion of the utility model;

[0027] Figure 4 It is a structure diagram of V-shaped groove arrangement of the utility model;

[0028] Figure 5 It is a structure diagram of arc-shaped protrusion arrangement of the utility model.

[0029] In the figure: 100, tarpaulin main body; 1, polyester base cloth; 2, PU waterproof layer; 3, tear-resistant layer; 4, hot melt adhesive layer A; 5, hot melt adhesive layer B; 6, flow guide groove; 7, V-shaped groove; 8, arc-shaped protrusion. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] The following will be combined Figures 1 to 5 The present application will be further described in detail,

[0032] The application discloses a waterproof polyester tarpaulin, which comprises a polyester base cloth 1, double-sided PU waterproof layers 2 and a tear-resistant layer 3.

[0033] The polyester base cloth 1 and the upper and lower PU waterproof layers 2 constitute a tarpaulin main body 100; the PU waterproof layer 2 on the surface is added with nano silicon dioxide particles for improving the overall wear resistance of the tarpaulin. The nano silicon dioxide (SiO2) particles are uniformly dispersed in the PU coating as reinforcing fillers, and the physical cross-linking improves the coating density and surface hardness. The nano particles form a "armor effect", reduce the direct damage of external force scratching to the coating; the high-surface-energy nano particles can reduce dust adhesion and prolong the durability of waterproof performance; and the PU coating flexibility and processing performance are not affected.

[0034] The bottom PU waterproof layer is provided with a microporous structure allowing water vapor to pass through but preventing liquid water from penetrating, and the pore diameter of the micropore is 0.1-1 mu m. The micropore diameter is between the water vapor molecules (about 0.0004 mu m) and the liquid water molecule groups (>100 mu m), and one-way air permeability is realized based on the capillary effect. Water vapor is allowed to escape, avoiding condensation inside the tarpaulin and improving the use comfort; the microporous structure reduces the amount of PU material and reduces the dependence on coating thickness; the 0.1-1 mu m pore diameter can withstand a water pressure of greater than or equal to 5000 mm, meeting the industrial waterproof standard.

[0035] The tear-resistant layer 3 is arranged between the polyester base cloth 1 and the PU waterproof layer 2; the tear-resistant layer 3 is an aramid fiber net. The aramid fiber net (such as Kevlar) has high strength, high modulus and high temperature resistance, and its net structure is embedded between the base cloth and the PU layer, which can disperse stress and prevent tear propagation. The tear resistance of the tarpaulin at the joint and folding place is significantly improved, and local damage is prevented from expanding; the aramid fiber is light in quality, avoiding increasing the overall weight; and it is not easy to deform in a high-temperature bonding process, ensuring the stability of the joint structure.

[0036] The hot melt adhesive layer A4 and the hot melt adhesive layer B5, the hot melt adhesive layer A4 is hot-pressed and bonded with the tear-resistant layer 3 and the polyester base cloth 1 respectively on both sides, and the hot melt adhesive layer B5 is hot-pressed and bonded with the tear-resistant layer 3 and the PU waterproof layer 2 respectively on both sides.

[0037] The outer surface of the hot melt adhesive layer B5 is pressed to form a flow guide groove 6 for guiding water flow along the groove to avoid water penetration.

[0038] The depth of the flow guide groove 6 is 0.3-1 mm, and the interval is 1-3 mm. By optimizing the groove depth and interval of the flow guide groove 6, the flow guide efficiency is maximized within a limited thickness, while the joint strength is avoided to be weakened, the shallow groove reduces the water flow resistance, the narrow interval prevents water droplets from being retained, the groove depth of less than or equal to 1 mm ensures the integrity of the hot melt adhesive layer bonding surface, avoids stress concentration, the parameters are adapted to the conventional roller pressing process, and the yield rate is high.

[0039] The flow guide grooves 6 are arranged at equal distances and are double-end open V-shaped grooves 7. The V-shaped cross section uses gravity to accelerate the water flow in a directional flow, and the double-end opening avoids water accumulation in the grooves. The V-shaped grooves 7 have a smaller cross-sectional area than the arc-shaped grooves, and the water flow is faster. The opening design allows impurities to be discharged with the water flow, reducing dust accumulation in the grooves. The V-shaped grooves 7 can be formed by pressing once with a toothed roller, reducing costs.

[0040] The outer surface of the hot melt adhesive layer B5 is pressed with arc-shaped protrusions 8 that are outwardly convex and arranged in a staggered manner. The flow guide grooves 6 are surrounded by the arc-shaped protrusions 8 around their periphery. The staggered arc-shaped protrusions 8 form the boundaries of the flow guide grooves 6, guiding the water flow into the grooves through the height difference of the protrusions. The protrusions increase the surface friction to prevent the tarp from sliding when stacked. The flow guide grooves 6 direct the water flow, the arc-shaped structure disperses external pressure, reducing the risk of deformation of the flow guide grooves 6, and the staggered arrangement avoids excessive mechanical feeling, improving the appearance quality of the product.

[0041] The waterproof polyester tarp is designed with a multi-layer structure. The tarp is composed of a polyester base fabric 1, a double-sided PU waterproof layer 2, and an anti-tear layer 3 in the middle. This structure design allows the tarp to maintain strength while providing good waterproofing.

[0042] The polyester base fabric 1 provides the main support for the tarp. The PU waterproof layer 2 is coated on both sides of the polyester base fabric 1, providing waterproofing. The anti-tear layer 3 is located between the polyester base fabric 1 and the PU waterproof layer 2, increasing the tear strength of the tarp. Hot melt adhesive layers A4 and B5 are used to bond the various layers of material together. Hot melt adhesive layer A4 bonds the anti-tear layer 3 and the polyester base fabric 1, and hot melt adhesive layer B5 bonds the anti-tear layer 3 and the PU waterproof layer 2. Flow guide grooves 6 are pressed on the outer surface of the hot melt adhesive layer B5, which can guide the water flow along the grooves to prevent water penetration.

[0043] The use of hot melt adhesive and PU waterproof layer 2 can effectively prevent water penetration, especially at the seams, as the hot melt bonding technology avoids the water seepage problem caused by stitching. The use of the anti-tear layer 3 increases the anti-tear ability of the tarp in places where stress is concentrated, such as seams and folds, reducing damage to the tarp caused by tearing. The design of the flow guide grooves 6 helps to quickly drain accumulated water, reducing the load on the tarp due to water weight, while also reducing the long-term soaking of the tarp surface by water, improving the durability of the tarp. Hot melt adhesive bonding and pressing of flow guide grooves 6 can be completed on an automated production line, improving production efficiency.

[0044] The waterproof polyester tarpaulin realizes three protections of hot melt adhesive + flow guide groove 6 + sealing tape through the synergistic effect of the aramid fiber tear-resistant layer 3, the nano-enhanced PU coating, the microporous breathable structure and the precise flow guide groove 6 design, the tear-resistant layer 3 and the nano-particle delay coating layer abrasion, the microporous structure reduces the material usage and discharges the moisture, the parameters are adapted to the existing production line and are easy to be industrialized. The design breaks through the technical bottleneck of the traditional tarpaulin from the aspects of material, structure and process, and is suitable for high requirement scenes such as outdoor tents and truck tarpaulins.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included within the scope of the present application.

Claims

1. A waterproofed polyester tarpaulin, characterized by, The utility model relates to a kind of waterproof tarpaulin, including: Polyester base cloth (1), with the upper and lower surfaces of PU waterproof layer (2) constitute canopy main body (100); Anti-tear layer (3), which is sandwiched between polyester base cloth (1) and PU waterproof layer (2); Hot melt adhesive layer A (4) and hot melt adhesive layer B (5), hot melt adhesive layer A (4) double-sided hot-pressing bonding anti-tear layer (3) and polyester base cloth (1) respectively, hot melt adhesive layer B (5) double-sided hot-pressing bonding anti-tear layer (3) and PU waterproof layer (2) respectively; The outer surface of hot melt adhesive layer B (5) is pressed to form a guide groove (6) for guiding water flow along the groove to avoid water penetration.

2. A waterproof polyester tarpaulin according to claim 1, characterized in that: The anti-tear layer (3) is an aramid fiber web.

3. A water repellent polyester tarpaulin according to claim 1, characterized in that: The surface of the PU waterproof layer (2) is added with nano-silicon dioxide particles for improving the overall wear resistance of the tarpaulin.

4. A waterproof polyester tarpaulin according to claim 1, characterized in that: The bottom layer of the PU waterproof layer is provided with a microporous structure that allows water vapor to pass through but prevents liquid water from penetrating, and the pore size of the micropores is 0.1-1 μm.

5. A waterproof polyester tarpaulin according to claim 1, characterized in that: The depth of the guide groove (6) is 0.3-1 mm, and the pitch is 1-3 mm.

6. A waterproof polyester tarpaulin according to claim 5, characterized in that: The guide groove (6) is arranged at equal distances and in the form of a double-ended open V-shaped groove (7).

7. A waterproof polyester tarpaulin according to claim 5, characterized in that: The outer surface of the hot melt adhesive layer B (5) is pressed with outwardly convex and staggered arc-shaped protrusions (8), and the guide groove (6) is surrounded by the arc-shaped protrusions (8) around it.

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