Composite flame-retardant fabric applied to metal melting and spattering protection and preparation method thereof

Abstract

The present application relates to a kind of composite flame-retardant fabric applied to metal melting splash protection and preparation method thereof, belong to special protection material technical field, including base cloth layer, metal functional layer, adhesive layer, the base cloth layer is connected with metal functional layer by adhesive layer, the base cloth layer is by base cloth yarn weaving composition.The present application, such as the composite flame-retardant fabric applied to metal melting splash protection is combined by the combination of base cloth layer, aluminium foil layer and flame-retardant adhesive layer, in combination with calendering-ladder curing process, solves the technical bottleneck of molten metal adhesion, high temperature instability and interface delamination, product realizes fabric gram weight:330-480gsm;Thickness:0.5-2mm;Breaking strength≥1500N;Tear strength≥100N;Anti-aluminum water splash grade: D3;Anti-iron water splash grade: E3;Heat protection performance TPP≥20cal / cm2;260 ℃ hot dimensional stability≤3%;Peeling strength≥30N / 5cm;Resist static water pressure≥100kPa technical index.

Description

Technical Field

[0001] This invention relates to the field of special protective materials technology, and in particular to a composite flame-retardant fabric for protection against molten metal splashes and its preparation method. Background Technology

[0002] The composite flame-retardant fabric, mainly used for protection against molten metal splashes, is a multi-layered functional fabric developed specifically for high-temperature and high-risk environments such as metallurgy, casting, welding, and glass manufacturing. Its core design goal is to achieve active protection against molten metal splashes with temperatures reaching 800℃~1400℃ on the basis of flame retardancy, while also taking into account heat insulation, moisture permeability, and wearing comfort.

[0003] Traditional protective fabrics for molten metal splashes mainly suffer from the following problems: 1. Insufficient anti-drip performance; molten metal has strong adhesion, and pure flame-retardant cotton is prone to carbonization and perforation when exposed to high-temperature molten metal droplets; 2. Poor thermal protection durability; the reflective layer of the aluminized film fabric peels off after repeated washing, resulting in reduced heat insulation performance; 3. Comfort deficiencies; the heavy structure leads to poor moisture permeability, which can easily cause heat accumulation damage. To solve the above problems, a composite flame-retardant fabric for molten metal splash protection and its preparation method are proposed. It can effectively block the penetration of molten metal droplets, maintain structural stability under high-temperature environments, and achieve a balance between protection and comfort. It can be used in high-risk environments such as metal smelting and casting, especially for active protection against splashes of molten aluminum and iron. Summary of the Invention

[0004] This invention provides a composite flame-retardant fabric for protection against molten metal splashes and its preparation method, solving the problems of insufficient anti-drip performance, poor thermal protection durability, and comfort deficiencies of traditional molten metal protective fabrics. By thermally bonding a high-performance flame-retardant fabric to a flexible aluminum foil film, a high-performance composite fabric is formed. Utilizing the smooth and high-temperature resistant properties of the aluminum foil surface, it quickly slides off upon contact with molten aluminum or iron, preventing burns.

[0005] The present invention provides the following solution to the above-mentioned technical problems: A composite flame-retardant fabric for protection against metal molten metal splashes, comprising a base fabric layer, a metal functional layer, and an adhesive layer. The base fabric layer and the metal functional layer are connected by the adhesive layer. The base fabric layer is woven from base fabric yarns, which are blended from 40 wt% para-aramid fiber, 40 wt% pre-oxidized fiber, 10 wt% modified acrylic fiber, and 10 wt% flame-retardant viscose fiber. The metal functional layer is made of aluminum foil. The adhesive layer comprises polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent.

[0006] The main technical specifications of the composite flame-retardant fabric are as follows: fabric weight: 330-480 gsm; thickness: 0.5-2 mm; tensile strength ≥1500 N; tear strength ≥100 N; aluminum splash resistance rating: D3; iron splash resistance rating: E3; thermal protection performance (TPP) ≥20 cal / cm2; 260℃ thermal dimensional stability ≤3%; peel strength ≥30 N / 5 cm; static water pressure resistance ≥100 kPa.

[0007] The preparation method includes the following steps:

[0008] S1, base fabric pretreatment: after the base fabric layer is woven from base fabric yarn, the surface of the base fabric layer is calendered to eliminate surface fuzz.

[0009] S2, adhesive preparation, polyurethane resin, flame retardant and curing agent are mixed in proportion, and the temperature is controlled ≤30℃;

[0010] S3, coating process, adhesive is applied to the base fabric with a doctor blade, coating amount 5-30g / m2;

[0011] S4, hot-pressing composite, aluminum foil and base fabric are hot-pressed together;

[0012] S5, curing treatment, involves placing the laminated fabric in a drying room for curing.

[0013] S6, Roll packaging: Roll up and package the cured fabric to complete the finished product.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the specifications of the base fabric yarn are 5-30S / 2, woven in 1 / 1 plain weave or 2 / 1 twill weave, with a weight of 200-450gsm.

[0016] Furthermore, the aluminum foil has an aluminum content of ≥98% and a thickness of 1-20μm.

[0017] Furthermore, the mass ratio of the polyurethane resin adhesive, the modified ammonium polyphosphate compound flame retardant, and the boron trifluoride complex curing agent is 7:2:1-5:3:2.

[0018] Furthermore, in step S1, a three-roll calender is used to perform surface calendering on the base fabric layer with a calendering pressure of 0.3-1.5 MPa, which increases the contact area during the composite process and improves the adhesion strength.

[0019] Furthermore, in step S2, a temperature-controlled high-speed dispersion kettle is used to mix polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent to prepare an adhesive. The stirring speed is 500-1500 rpm, and the stirring temperature is ≤30℃.

[0020] Furthermore, in step S3, the coating process uses a doctor blade coating machine to evenly coat the adhesive on the surface of the base fabric, so that the adhesive layer thickness is uniform. The adhesive layer is dried in a hot air drying oven at a temperature of 60-80℃.

[0021] Furthermore, in step S4, the hot-pressing composite process uses a hot-pressing composite machine to pressure-bond the aluminum foil and the coated base fabric. The pressure control range is 1.5-2.5 MPa, and the temperature control is 160-180℃.

[0022] Furthermore, in step S5, a bridge-type hot air circulating drying oven is used, with a curing temperature of 80-100℃, a curing time of 20-40h, and an air velocity of 0.5-2m / s. The curing process can effectively improve the composite strength of the composite fabric.

[0023] Furthermore, in step S6, a constant tension center winding machine is used to wind and package the cured fabric, with the tension controlled at 5-20N to avoid wrinkles in the composite fabric.

[0024] The beneficial effects of this invention are as follows: This invention provides a composite flame-retardant fabric for protection against metal molten metal splashes and its preparation method, which has the following advantages:

[0025] 1. It solves the problem that traditional flame-retardant cotton is prone to carbonization and adhesion when exposed to high-temperature molten metal droplets, resulting in heat penetration and burns. By reducing the surface tension of molten droplets through an ultra-thin aluminum foil layer, it blocks the wetting and penetration of molten metal, thus achieving anti-adhesion protection against molten aluminum and molten iron.

[0026] 2. It solves the problem of insufficient protective durability of traditional aluminized film fabrics. It ensures structural stability in high-temperature and humid environments by sealing the pores through high-temperature carbonization of pre-oxidized fibers and rigid support of aramid fibers.

[0027] 3. By forming capillary moisture-wicking channels through a base fabric blending system and applying a dotted adhesive layer, the problem of poor moisture permeability and high risk of heat stress for workers caused by traditional heavy structures is solved, thus overcoming the challenge of balancing protection and comfort.

[0028] 4. It solves the problem of delamination of conventional adhesives at high temperatures and the protective failure caused by aluminum foil peeling. It achieves long-lasting adhesion of the composite interface through boron trifluoride complex catalytic crosslinking and step curing process, effectively improving peel strength and making it more washable.

[0029] 5. This composite flame-retardant fabric for protection against molten metal splashes combines a base fabric layer, an aluminum foil layer, and a flame-retardant adhesive layer with a calendering-step curing process. This overcomes the technical bottlenecks of molten metal adhesion, high-temperature instability, and interface delamination. The product achieves the following technical specifications: fabric weight: 330-480 gsm; thickness: 0.5-2 mm; tensile strength ≥1500 N; tear strength ≥100 N; aluminum splash protection rating: D3; iron splash protection rating: E3; thermal protection performance TPP ≥20 cal / cm2; 260℃ thermal dimensional stability ≤3%; peel strength ≥30 N / 5 cm; static water pressure resistance ≥100 kPa. By thermally bonding the high-performance flame-retardant fabric with a flexible aluminum foil film, a high-performance composite fabric is formed. The smooth, high-temperature resistant surface of the aluminum foil allows it to quickly slide off upon contact with molten aluminum or iron, preventing burns.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of a composite flame-retardant fabric for protection against molten metal splashes and its preparation method, provided in an embodiment of the present invention.

[0033] Figure 2 A schematic diagram showing an embodiment of the present invention of a composite flame-retardant fabric for protection against molten metal splashes and its preparation method:

[0034] 1. Base fabric layer; 2. Adhesive layer; 3. Metal functional layer. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-2 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example: Figure 1-2 As shown, this invention provides a composite flame-retardant fabric for protection against molten metal splashes and its preparation method, comprising a base fabric layer 1, a metal functional layer 3, and an adhesive layer 2. The base fabric layer 1 and the metal functional layer 3 are connected by the adhesive layer 2. The base fabric layer 1 is woven from base fabric yarns, which are blended from 40 wt% para-aramid fiber, 40 wt% pre-oxidized fiber, 10 wt% modified acrylic fiber, and 10 wt% flame-retardant viscose fiber. The metal functional layer 3 is made of aluminum foil. The adhesive layer 2 includes a polyurethane resin adhesive, a modified ammonium polyphosphate compound flame retardant, and a boron trifluoride complex curing agent.

[0038] Preferably, the base fabric yarn has a specification of 5-30S / 2, is woven in a 2 / 1 twill weave, and has a weight of 250gsm.

[0039] Preferably, the aluminum foil has an aluminum content of ≥98% and a thickness of 5μm.

[0040] Preferably, the mass ratio of polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent is 7:2:1.

[0041] The preparation method is as follows:

[0042] S1, base fabric pretreatment, base fabric layer 1 is woven from base fabric yarn, the base fabric yarn ratio is 40% para-aramid, 40% pre-oxidized yarn, 10% modified acrylic, and 10% flame retardant viscose. The base fabric yarn is 20S / 2 strand yarn, 2 / 1 twill weave, with a weight of 250gsm.

[0043] The base fabric layer 1 is calendered using a three-roll calender with a calendering pressure of 1.50 MPa to eliminate surface fuzz, increase the contact area during the lamination process, and improve the adhesion strength.

[0044] S2, Adhesive preparation: Polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent are mixed in a temperature-controlled high-speed dispersion kettle to prepare the adhesive. The ratio of polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent is 7:2:1. The stirring speed is 1000 rpm and the stirring temperature is 20℃.

[0045] S3, Coating process: The adhesive is evenly coated on the surface of the base fabric using a doctor blade coating machine with a coating amount of 10g / m2, so that the adhesive layer thickness is uniform. The adhesive layer is dried in a hot air drying oven at a drying temperature of 80℃.

[0046] S4, hot-press lamination, uses a hot-press lamination machine to pressure bond aluminum foil to the coated base fabric, with a pressure of 2.0 MPa and a temperature control of 160℃;

[0047] S5, Curing treatment, uses a bridge-type hot air circulating drying room to cure the fabric after lamination. The curing temperature is 90℃, the curing time is 25h, and the wind speed is 1.5m / s. The curing process can effectively improve the lamination strength of the composite fabric.

[0048] S6, winding packaging, uses a constant tension center winding machine to wind and package the cured fabric to avoid wrinkles in the composite fabric;

[0049] The performance indicators of the metal molten sputtering composite flame-retardant protective fabric are as follows:

[0050]

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Content not described in detail in this specification is prior art known to those skilled in the art.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A composite flame-retardant fabric for protection against metal molten metal splashes, comprising a base fabric layer (1), a metal functional layer (3), and an adhesive layer (2), characterized in that, The base fabric layer (1) and the metal functional layer (3) are connected by an adhesive layer (2). The base fabric layer (1) is woven from base fabric yarn, which is made of a blend of 40wt% para-aramid fiber, 40wt% pre-oxidized fiber, 10wt% modified acrylic fiber, and 10wt% flame-retardant viscose fiber. The metal functional layer (3) is made of aluminum foil. The adhesive layer (2) includes polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent. The main technical specifications of the composite flame-retardant fabric are: fabric weight: 330-480 gsm; Thickness: 0.5-2mm; Breaking strength ≥1500N; Tear strength ≥100N; Resistant to molten aluminum splashes: D3; Resistant to molten iron splashes: E3; Thermal protection performance TPP≥20cal / cm 2 260℃ thermal dimensional stability ≤3%; peel strength ≥30N / 5cm; static water pressure resistance ≥100kPa; The preparation method includes the following steps: S1, base fabric pretreatment, the base fabric layer (1) is made of base fabric yarn and then the fabric of the base fabric layer (1) is subjected to surface calendering treatment. S2, adhesive preparation, polyurethane resin, flame retardant and curing agent are mixed in proportion, and the temperature is controlled ≤30℃; S3, coating process, adhesive is applied to the base fabric using a doctor blade, coating amount 5-30 g / m². 2 ; S4, hot-pressing composite, aluminum foil and base fabric are hot-pressed together; S5, curing treatment, involves placing the laminated fabric in a drying room for curing. S6, Roll packaging: Roll up and package the cured fabric to complete the finished product.

2. The composite flame-retardant fabric for protection against metal molten metal splashes according to claim 1, characterized in that, The base fabric yarn has a specification of 5-30S / 2, is woven in 1 / 1 plain weave or 2 / 1 twill weave, and has a weight of 200-450 gsm.

3. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, The aluminum foil has an aluminum content of ≥98% and a thickness of 1-20μm.

4. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, The mass ratio of the polyurethane resin adhesive, the modified ammonium polyphosphate compound flame retardant, and the boron trifluoride complex curing agent is 7:2:1 or 5:3:

2.

5. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S1, a three-roll calender is used to perform surface calendering on the base fabric layer with a calendering pressure of 0.3-1.5 MPa.

6. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S2, a temperature-controlled high-speed dispersion kettle is used to mix polyurethane resin adhesive, modified ammonium polyphosphate compound flame retardant, and boron trifluoride complex curing agent to prepare an adhesive. The stirring speed is 500-1500 rpm and the stirring temperature is ≤30℃.

7. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S3, the coating process uses a doctor blade coater to evenly coat the adhesive on the surface of the base fabric, and a hot air drying oven is used to dry the adhesive layer at a temperature of 60-80℃.

8. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S4, the hot-pressing composite process uses a hot-pressing composite machine to press and bond the aluminum foil to the coated base fabric. The pressure is controlled within the range of 1.5-2.5 MPa, and the temperature is controlled within the range of 160-180℃.

9. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S5, a bridge-type hot air circulating drying oven is used, with a curing temperature of 80-100℃ and a curing time of 20-40h.

10. The composite flame-retardant fabric for protection against molten metal splashes according to claim 1, characterized in that, In step S6, a constant tension center winding machine is used to wind and package the cured fabric.

Images