Transparent film product against ultraviolet and infrared rays and application umbrella

Abstract

This invention discloses a transparent film product that protects against ultraviolet and infrared rays and its application in umbrellas. The main body of the film product is a TPU film formed by melt extrusion casting based on thermoplastic polyurethane elastomer masterbatch. Two layers of TPU film are sandwiched between each other, containing a layer of ultraviolet absorber, an infrared absorber, and a nano-insulating material, which are then fused and stretched to form a transparent film. Alternatively, it can be a composite TPU film formed by melt extrusion casting of thermoplastic polyurethane elastomer masterbatch uniformly mixed with the aforementioned auxiliary materials. This film product, as an umbrella surface material, inherits the high strength, high elasticity, high abrasion resistance, and high flexibility of TPU material, as well as its chemical properties of resistance to oil stains and acid rain. Furthermore, it ensures that the optimized materials for ultraviolet protection, infrared protection, and heat insulation remain stable without migration, thus solving the triple functional requirements of umbrella surface materials: unobstructed vision, protection against radiation damage, and heat insulation.

Description

Technical Field

[0001] This invention relates to a transparent film product, and more particularly to an umbrella made of an improved transparent film that has the ability to resist ultraviolet and infrared rays. Background Technology

[0002] Umbrellas are a common and indispensable tool in people's daily lives, mainly consisting of a controllable metal frame and a flexibly foldable canopy. For a long time, umbrella product upgrades have focused on these two main components. For example, from the original frame structure that relied entirely on manual opening and closing, to semi-automatic frames that automatically opened and closed upon triggering, and now to fully automatic frames operated by a single handle. The canopy materials have also undergone optimization processes, including paper with tung oil, nylon fabric, pongee, PG blended fabric, and high-density polyester fiber fabric, with improvements made in printing, dyeing, sun protection, heat insulation, and durability.

[0003] While sun protection has become the mainstream and key feature in the umbrella market, with umbrellas often featuring dark solid-color printing or simply black vinyl, this inadvertently creates blind spots and safety hazards for the umbrella user. While some ready-made umbrellas made of PVC or PU fabrics are also widely available, these sacrifice sun protection for clear visibility, failing to meet the needs of outdoor activities under intense sunlight and without adequate shade, creating a dilemma for people when choosing outdoor gear. Summary of the Invention

[0004] The purpose of this invention is to provide a transparent film product that protects against ultraviolet and infrared rays and its application in umbrellas, thereby solving the problems of blind spots in umbrella vision and skin protection.

[0005] One technical solution of the present invention to achieve one of the above objectives is a transparent film product that protects against ultraviolet and infrared rays, comprising two layers of TPU film formed by melt extrusion casting based on thermoplastic polyurethane elastomer masterbatch, wherein a layer of ultraviolet absorber, an infrared absorber and a nano heat insulation material are sandwiched between the two TPU film layers, and the film is fused and stretched into a transparent film.

[0006] Furthermore, the hard segment content in the TPU film meets the standards for hardness, modulus, and tear resistance as a raw material for umbrella surfaces.

[0007] Furthermore, the ultraviolet absorber, infrared absorber, and nano-insulating material are uniformly coated between two layers of residual heat TPU film and embedded in one piece.

[0008] Furthermore, the ultraviolet absorber, infrared absorber, and nano-insulating material are formed by brushing adhesive between two layers of cooled and molded TPU film and uniformly coating and drying to cure.

[0009] Furthermore, the outer surfaces of the two TPU films are uniformly coated with a hydrophobic anti-adhesion layer.

[0010] Another technical solution of the present invention to achieve one of the above objectives is a transparent film product that protects against ultraviolet and infrared rays. It is a composite TPU film formed by melt extrusion casting of thermoplastic polyurethane elastomer masterbatch as the base material and uniformly mixing ultraviolet absorber, infrared absorber and nano heat insulation material.

[0011] Furthermore, both sides of the composite TPU film are uniformly coated with a hydrophobic anti-adhesion layer.

[0012] The technical solution for achieving the second objective of the present invention is an application umbrella made of the aforementioned film product as the umbrella surface material. The umbrella surface is transparent, rainproof, and provides heat insulation and protection against ultraviolet and infrared rays to the umbrella holder.

[0013] The technical effects of the film products and umbrellas using the present invention are as follows: the umbrella material inherits the mechanical properties of TPU material, such as high strength, high elasticity, high wear resistance and high flexibility, as well as the chemical properties of oil resistance and acid rain resistance. It also ensures that the optimized materials such as anti-ultraviolet, anti-infrared and heat insulation are kept in a stable state without migration, thus solving the triple functional requirements of the umbrella material to not obstruct the view, protect against radiation damage and provide heat insulation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the molding structure of a preferred embodiment of the thin film product of the present invention.

[0015] Figure 2 This is a schematic diagram of the molding structure of a preferred embodiment of the thin film product of the present invention. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master, and thus to make a clearer definition of the scope of protection of the present invention.

[0017] This invention proposes a transparent film product that protects against ultraviolet and infrared rays, such as... Figure 1 As shown in the preferred embodiment, the film product contains two layers of TPU film 1 formed by melt extrusion casting based on thermoplastic polyurethane elastomer masterbatch, and a layer of ultraviolet absorber 2, an infrared absorber 3 and a nano heat insulation material 4 are sandwiched between the upper and lower TPU film layers, and are fused and stretched into a transparent multifunctional finished film.

[0018] As the core substrate, the TPU film's raw material masterbatch is a polymer material polymerized from diisocyanate, oligomeric polyols, and chain extenders. It is also an (AB)n-type block linear polymer, exhibiting a unique multi-segment structure with cross-linked flexible soft segments and rigid hard segments, its properties falling between those of plastics and rubber. When this transparent film is used as an umbrella material, the content of hard segments must meet the required standards for hardness, modulus, and tear strength.

[0019] TPU film production mainly consists of four steps: raw material melting, extrusion film formation, cooling and shaping, and traction winding. Common processes include casting, blow molding, and calendering. Among them, casting involves allowing the melt to flow onto a cold roller, resulting in a smooth and transparent film surface, which is most suitable for film products that require high uniformity of thickness.

[0020] To optimize the functionality of the TPU film, the ultraviolet absorbers used are at least UV-P (2-(2ˊ-hydroxy-5ˊ-methylphenyl)benzotriazole), UV-O (2,4-dihydroxybenzophenone), UV-9 (2-hydroxy-4-methoxybenzophenone), UV-531 (2-hydroxy-4-n-octyloxybenzophenone), UVP-327 (2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole), RMB (resorcinol monobenzoate), and GW-540 (tris(1,2,2,6,6-pentamethylpiperidinyl)phosphite). Infrared absorbers include IRG-022 and copper sulfide. The nano-insulating materials used are nano-sized metal oxides such as ATO, ITO, and TIN.

[0021] From the molding process of the preferred embodiment of the film product, a TPU film as a base layer is usually formed first. While the TPU film is flattened off the roller and flowing in one direction, a layer of aerogel felt for heat insulation is applied using the residual heat of the TPU film. This aerogel felt is a porous heat insulation material with nanoscale pores and low thermal conductivity. Then, a layer of ultraviolet absorber and a layer of infrared absorber are sequentially coated or sprayed onto the TPU film, deposited or uniformly fused in layers to obtain a preliminary semi-finished product. Next, a TPU film as a top cover is simultaneously formed in the later part of the flow direction, flush-fitted and pressed onto the surface of the preliminary semi-finished product. Finally, the two TPU films are calendered together to obtain an advanced semi-finished product. When the film product is used as an umbrella material, since the product is often exposed to wind, rain, or impacts, a hydrophobic anti-adhesion layer 5 is also uniformly coated on the outer surfaces of the two TPU films. The main components are non-melting powder or paraffin-based lubricants to form a protective layer in harsh environments, preventing adhesion and tearing after folding or prolonged storage due to high temperature exposure, while also helping to prevent yellowing of transparent film products.

[0022] In addition to the above-mentioned preferred molding process, two TPU films can be made continuously and cooled and shaped. Then, after applying adhesive to the surface of one TPU film, heat insulation material, ultraviolet absorber and infrared absorber are applied. After that, another TPU film is pressed on top with the edges flush, and then the two TPU films are combined into one by calendering to obtain an advanced semi-finished product.

[0023] In addition to the preferred embodiments, the present invention also has the following features: Figure 2 The preferred embodiment shown is a composite TPU film made by melt extrusion casting of thermoplastic polyurethane elastomer masterbatch as the base material, and uniformly mixing ultraviolet absorbers, infrared absorbers, and nano-insulating materials. Therefore, this embodiment is not a composite product resulting from the functional optimization of two TPU films, but rather a composite TPU film formed by directly and uniformly mixing the masterbatch and casting it in one step using the TPU casting method. After the semi-finished product cools and sets, a hydrophobic anti-adhesion layer is uniformly coated on both sides.

[0024] The film products obtained through the above-mentioned optional embodiments can be applied to the production and manufacturing of umbrellas. Because the finished film material exhibits highly consistent performance across its entire width, the film can be cut, perforated, edge-sealed, and assembled according to the required umbrella size (traditional umbrella-making processes, omitted here). The resulting umbrellas can be used for rain protection on rainy days and for sun protection and insulation in hot weather, with unobstructed vision.

[0025] In summary, the above description and detailed embodiments of the film products and their applications in umbrellas of the present invention demonstrate that this solution possesses outstanding substantive features and significant advancements. Its technical effects are reflected in the following: the umbrella material inherits the mechanical properties of TPU material, such as high strength, high elasticity, high wear resistance, and high flexibility, as well as its chemical properties of resistance to oil stains and acid rain. Furthermore, it ensures that the optimized materials composited within it, such as those for UV protection, infrared protection, and heat insulation, remain in a stable state without migration. This solves the triple functional requirements of the umbrella material: unobstructed vision, protection against radiation damage, and heat insulation.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transparent film product that protects against ultraviolet and infrared rays, characterized in that: The film product contains two layers of TPU film formed by melt extrusion casting based on thermoplastic polyurethane elastomer masterbatch, and sandwiches between the two TPU film layers with a layer of ultraviolet absorber, an infrared absorber and a nano heat insulation material, and is fused and stretched into a transparent film.

2. The transparent film product that protects against ultraviolet and infrared rays according to claim 1, characterized in that: The TPU film contains enough hard segments to meet the requirements for hardness, modulus, and tear resistance as a raw material for umbrella surfaces.

3. The transparent film product that protects against ultraviolet and infrared rays according to claim 1, characterized in that: The ultraviolet absorber, infrared absorber, and nano-insulating material are uniformly coated between two layers of residual heat TPU film and embedded in one piece.

4. The transparent film product that protects against ultraviolet and infrared rays according to claim 1, characterized in that: The ultraviolet absorber, infrared absorber, and nano-insulating material are formed by brushing adhesive between two layers of cooled and molded TPU film, uniformly coating, and then drying and curing.

5. The transparent film product that protects against ultraviolet and infrared rays according to claim 1, characterized in that: The outer surfaces of both TPU films are uniformly coated with a hydrophobic anti-adhesion layer.

6. A transparent film product that protects against ultraviolet and infrared rays, characterized in that: The film product is a composite TPU film formed by melt extrusion casting of thermoplastic polyurethane elastomer masterbatch as the base material and uniformly mixed with ultraviolet absorber, infrared absorber and nano heat insulation material.

7. The transparent film product that protects against ultraviolet and infrared rays according to claim 6, characterized in that: The composite TPU film has a hydrophobic anti-adhesion layer uniformly coated on both sides.

8. An application umbrella, characterized in that: The umbrella is made of the film product described in any one of claims 1 to 8 as the umbrella surface material. The umbrella surface is transparent, rainproof, and heat-insulating and blocking ultraviolet and infrared rays when facing the umbrella holder.

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