High-bearing memory foam insole and preparation method thereof

Abstract

The invention discloses a high-bearing memory foam insole and a preparation method thereof, and the high-bearing memory foam insole structurally comprises an insole. The insole comprises a lower insole body, a composite layer arranged on the upper surface of the lower insole body, an upper insole body arranged on the upper surface of the composite layer and a surface layer located on the surface of the upper insole body. The preparation method has the beneficial effects that through mixed production of the component A and the component B in the preparation process, complete mixing and stirring of the added carbon nanotubes and modified superfine glass fibers, and quantitative and timed feeding, mixing and stirring operation according to the temperature, the stirring rotating speed and the quantitative and timed feeding of the raw materials in the mixing and stirring process, all the components fully react, and the mixing and stirring efficiency is improved; the composite performance of high bearing capacity, flame retardance and high compressive strength can be obtained, the density and the bearing capacity meet the national standard requirements, and the problems of collapse, unevenness, non-ideal tensile strength, non-ideal bursting strength and the like generated when the memory foam insole is used are solved.

Description

Technical Field

[0001] The invention relates to a field of high-load memory foam insole and a preparation method thereof. Background Art

[0002] Existing insoles are made by mixing polyether polyol composite materials and pouring them into molds. Insoles with memory properties are recognized by the market. As users have higher and higher requirements for the performance of insoles, such as air permeability, load-bearing capacity, and comfort, different people will have different preferences for the performance of insoles. For example, those who love sports will choose insoles with good air permeability, those who love dancing will choose insoles with good elasticity, and middle-aged and elderly people will choose softer insoles.

[0003] As material conditions improve, users have higher and higher requirements for the performance of insoles. How to balance breathability and load-bearing capacity has become a technical problem that needs to be solved urgently.

[0004] Therefore, there is an urgent need for a memory foam insole having good air permeability and high load-bearing capacity and a preparation method thereof. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a high-load memory foam insole and a preparation method thereof, so as to solve the defects in the above-mentioned background technology.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A high-load memory foam insole, the structure of which includes an insole, characterized in that the insole includes a lower insole, a composite layer arranged on the upper surface of the lower insole, an upper insole arranged on the upper surface of the composite layer, and a surface layer located on the surface of the upper insole;

[0008] The composite layer 2 is composed of component A and component B. The two components are mixed and cast into a mold. According to the mass percentage, component A is 90-150 parts and component B is 50-85 parts. Component A includes:

[0009]

[0010] Component B includes 100 parts of a cross-linking agent and 1-5 parts of a flame retardant.

[0011] As a further solution of the present invention, the composite layer also includes carbon nanotubes and modified ultra-fine glass fibers to improve the stability, high temperature resistance and load-bearing strength of the insole.

[0012] As a further solution of the present invention, the cross-linking agent is isocyanate. By adding isocyanate to the mixture of component A and component B, a high-load memory foam insole can be obtained with improved compression resistance and load-bearing capacity.

[0013] As a further embodiment of the present invention, the blowing agent is one or more of water, dichloromethane and cyclopentyl isocyanate.

[0014] As a further solution of the present invention, the catalyst is one or more of American Air PC-5, A33 catalyst, 33 catalyst, and 330 catalyst.

[0015] As a further solution of the present invention, the flame retardant is 1-chloro-2-butoxyethane phosphate, with a phosphorus content of 0.7% and an oxygen index of 54. It is easy to generate phosphoric acid after combustion, which can promote the formation of a polyurethane foam carbon layer during combustion and has a significant flame retardant effect.

[0016] A method for preparing a high-load memory foam insole comprises the following steps:

[0017] S1. Prepare component A: mix and stir to obtain component A at a temperature of 15-30° C. Specifically, by weight, 15-25 parts of water, 3-5 parts of foam leveling agent, 10-15 parts of polyether polyol, 3-5 parts of chain extender, 3-7 parts of flame retardant, 50-80 parts of polyol, and 0.5-1 part of catalyst are stirred in an inert gas for 15-20 minutes at a stirring rate of 1000-1100 rpm to obtain component A;

[0018] S2. Prepare component B: mix and stir to obtain component B at a temperature of 15-25° C. Specifically, 100 parts of isocyanate and 1-5 parts of flame retardant are stirred in an inert gas for 8-10 minutes at a stirring rate of 1600-1800 rpm to obtain component B;

[0019] S3, fully stirring the obtained component A and component B, and after stirring until the two are completely mixed and no particle rods are left, adding carbon nanotubes and modified ultrafine glass fibers and stirring;

[0020] S4, inject the prepared raw materials into a high shear mixer at a stirring speed of 2000-2500 rpm, stir for 5-10 minutes, and then spray them into the mold with a gun for foaming;

[0021] In S3, component A was added to the high shear mixer in three batches, with an interval of 1-2 min between each addition;

[0022] S5, the foamed material is subjected to pressure stabilization and shaping by a mold, and is cooled after shaping, and is cut with a water jet cutting machine after cooling;

[0023] S6. The cut pieces are conveyed to a drying line for drying at a temperature of 125-150° C. for 3-5 hours. After drying, the pieces are rolled up to obtain insoles.

[0024] As a further embodiment of the present invention, the mixing and stirring temperature of component A and component B is 28-30°C.

[0025] As a further embodiment of the present invention, the reaction temperature is 16-20°C.

[0026] As a further solution of the present invention, during the casting process, the internal heating temperature of the mold is 55-65°C.

[0027] Advantageous Effects of the Invention

[0028] Compared with the traditional high-load memory foam insole and its preparation method, the present invention has the following beneficial effects:

[0029] In the present invention, by mixing the A component and the B component in the preparation process, completely mixing and stirring the added carbon nanotubes and the modified ultrafine glass fibers, and controlling the temperature, stirring speed, and quantitative and timing of the raw materials in the mixing and stirring process, the components are fully reacted to obtain a composite material with high load-bearing, flame retardant, and high compressive strength, and the density and load-bearing capacity meet the requirements of national standards, thereby solving the problems of uneven collapse, unsatisfactory tensile strength, and bursting strength generated by the memory foam insole during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objectives and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the accompanying drawings.

[0031] In the attached picture:

[0032] Figure 1 It is a structural schematic diagram of a high-load memory foam insole and a preparation method thereof of the present invention;

[0033] In the figure: lower insole-1, composite layer-2, upper insole-3, surface layer-4. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, the present invention provides a technical solution of a high-load memory foam insole and a preparation method thereof:

[0037] As shown in the figure, a high-load memory foam insole, the structure of which includes an insole, characterized in that the insole includes a lower insole 1, a composite layer 2 arranged on the upper surface of the lower insole 1, an upper insole 3 arranged on the upper surface of the composite layer 2, and a surface layer 4 located on the surface of the upper insole 3;

[0038] The composite layer 2 is composed of component A and component B. The two components are mixed and cast into a mold. According to the mass percentage, component A is 90-150 parts and component B is 50-85 parts. Component A includes:

[0039]

[0040] Component B includes 100 parts of a cross-linking agent and 1-5 parts of a flame retardant.

[0041] The composite layer 2 also includes carbon nanotubes and modified ultra-fine glass fibers to improve the stability, high temperature resistance and load-bearing strength of the insole.

[0042] The cross-linking agent is isocyanate. By adding isocyanate into the mixture of component A and component B, the high-load memory foam insole can have improved compression resistance and load-bearing capacity.

[0043] The blowing agent is one or more of water, dichloromethane and cyclopentyl isocyanate.

[0044] The catalyst is one or more of American Air PC-5, A33 catalyst, 33 catalyst, and 330 catalyst.

[0045] The flame retardant is 1-chloro-2-butoxyethane phosphate, with a phosphorus content of 0.7% and an oxygen index of 54. It is easy to generate phosphoric acid after combustion, which can promote the formation of a polyurethane foam carbon layer during combustion and has a significant flame retardant effect.

[0046] A method for preparing a high-load memory foam insole comprises the following steps:

[0047] S1. Prepare component A: mix and stir to obtain component A at a temperature of 15-30° C. Specifically, by weight, 15-25 parts of water, 3-5 parts of foam leveling agent, 10-15 parts of polyether polyol, 3-5 parts of chain extender, 3-7 parts of flame retardant, 50-80 parts of polyol, and 0.5-1 part of catalyst are stirred in an inert gas for 15-20 minutes at a stirring rate of 1000-1100 rpm to obtain component A;

[0048] S2. Prepare component B: mix and stir to obtain component B at a temperature of 15-25° C. Specifically, 100 parts of isocyanate and 1-5 parts of flame retardant are stirred in an inert gas for 8-10 minutes at a stirring rate of 1600-1800 rpm to obtain component B;

[0049] S3, fully stirring the obtained component A and component B, and after stirring until the two are completely mixed and no particle rods are left, adding carbon nanotubes and modified ultrafine glass fibers and stirring;

[0050] S4, inject the prepared raw materials into a high shear mixer at a stirring speed of 2000-2500 rpm, stir for 5-10 minutes, and then spray them into the mold with a gun for foaming;

[0051] In S3, component A was added to the high shear mixer in three batches, with an interval of 1-2 min between each addition;

[0052] S5, the foamed material is subjected to pressure stabilization and shaping by a mold, and is cooled after shaping, and is cut with a water jet cutting machine after cooling;

[0053] S6. The cut pieces are conveyed to a drying line for drying at a temperature of 125-150° C. for 3-5 hours. After drying, the pieces are rolled up to obtain insoles.

[0054] The mixing temperature of component A and component B is 28-30°C.

[0055] The reaction temperature is 16-20°C.

[0056] During the pouring process, the internal heating temperature of the mold is 55-65℃.

[0057] Embodiment 2:

[0058] A high-load memory foam insole, the structure of which includes an insole, characterized in that the insole includes a lower insole 1, a composite layer 2 arranged on the upper surface of the lower insole 1, an upper insole 3 arranged on the upper surface of the composite layer 2, and a surface layer 4 located on the surface of the upper insole 3;

[0059] The composite layer 2 is composed of component A and component B. The two components A and B are mixed and cast by compression molding. The components A and B are in parts by mass, wherein component A is 100 parts and component B is 65 parts.

[0060] The raw materials of component A are: 100 parts of polyol, 65 parts of polyether polyol, 3 parts of flame retardant, 2.5 parts of foaming agent, 1 part of chain extender, 2 parts of foaming agent, and 4 parts of catalyst;

[0061] The raw materials of component B are: 100 parts of isocyanate and 1 part of flame retardant.

[0062] It also includes carbon nanotubes and modified ultra-fine glass fibers to improve the insole's stability, high temperature resistance and load-bearing strength.

[0063] The polyol is a mixed system of polytetramethylene glycol and polyether polyol, the molecular weight of the polyether polyol is 2500 and the hydroxyl value is 395 mgKOH / g; the molecular weight of the polytetramethylene glycol is 1000 and the hydroxyl value is 270 mgKOH / g.

[0064] The foam leveler is a mixture of silicone and polysiloxane.

[0065] The isocyanate is polymeric diphenylmethane diisocyanate.

[0066] The flame retardant is triphenyl phosphate.

[0067] The chain extender is glycerol.

[0068] The blowing agent is dichloromethane.

[0069] The catalyst is a combined catalyst including 85 parts of water, 2 parts of N,N-dimethylcyclohexylamine and 2 parts of diethylamine.

[0070] All the above substances are mixed evenly under negative pressure stirring state for use;

[0071]

[0072] Example 2 Experimental Data Table

[0073] Embodiment 3:

[0074] A high-load memory foam insole, the structure of which includes an insole, characterized in that the insole includes a lower insole 1, a composite layer 2 arranged on the upper surface of the lower insole 1, an upper insole 3 arranged on the upper surface of the composite layer 2, and a surface layer 4 located on the surface of the upper insole 3;

[0075] The composite layer 2 is composed of component A and component B.

[0076] According to the weight proportion, it is composed of component A and component B, and the two components are mixed and poured and molded, wherein component A is 140 parts and component B is 50 parts.

[0077] The raw materials of component A are: 140 parts of polyol, 83 parts of polyether polyol, 4 parts of flame retardant, 3 parts of foaming agent, 1.2 parts of chain extender, 2.2 parts of foaming agent, and 8 parts of catalyst;

[0078] The raw materials of component B are: 100 parts of isocyanate and 1 part of flame retardant.

[0079] It also includes carbon nanotubes and modified ultra-fine glass fibers to improve the insole's stability, high temperature resistance and load-bearing strength.

[0080] The polyol is a mixture of polytetramethylene glycol and 65 parts of polyether polyol, the molecular weight of the polyether polyol is 2900 and the hydroxyl value is 330 mgKOH / g; the molecular weight of polytetramethylene glycol is 2000 and the hydroxyl value is 495 mgKOH / g. The foam leveler is a mixture of silicone and polysiloxane.

[0081] The isocyanate is polymeric diphenylmethane diisocyanate.

[0082] The flame retardant is triphenyl phosphate.

[0083] The chain extender is glycerol.

[0084] The blowing agent is dichloromethane.

[0085] The catalyst is a combined catalyst including 87 parts of water, 2 parts of N,N-dimethylcyclohexylamine and 1 part of diethylamine.

[0086] All the above substances are mixed evenly under negative pressure stirring state for use;

[0087]

[0088] Example 3 Experimental data

[0089] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0090] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-load memory foam insole, comprising an insole, characterized in that; The insole comprises a lower insole (1), a composite layer (2) arranged on the upper surface of the lower insole (1), an upper insole (3) arranged on the upper surface of the composite layer (2), and a surface layer (4) located on the surface of the upper insole (3); The composite layer (2) is composed of component A and component B. The two components are mixed and cast into a mold. In terms of mass fraction, component A is 90-150 parts and component B is 50-85 parts. Component A includes: Component B includes 100 parts of a cross-linking agent and 1-5 parts of a flame retardant.

2. The high-load memory foam insole according to claim 1, characterized in that: The composite layer (2) also includes carbon nanotubes and modified ultra-fine glass fibers.

3. The high-load memory foam insole according to claim 1, characterized in that: The cross-linking agent is isocyanate.

4. The high-load memory foam insole according to claim 1, characterized in that: The foaming agent is one or more of water, dichloromethane and cyclopentyl isocyanate.

5. The high-load memory foam insole according to claim 1, characterized in that: The catalyst is one or more of American Air PC-5, A33 catalyst, 33 catalyst, and 330 catalyst.

6. The method for preparing a high-load memory foam insole according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Prepare component A: mix and stir to obtain component A at a temperature of 15-30° C. Specifically, by weight, 15-25 parts of water, 3-5 parts of foam leveling agent, 10-15 parts of polyether polyol, 3-5 parts of chain extender, 3-7 parts of flame retardant, 50-80 parts of polyol, and 0.5-1 part of catalyst are stirred in an inert gas for 15-20 minutes at a stirring rate of 1000-1100 rpm to obtain component A; S2. Prepare component B: mix and stir to obtain component B at a temperature of 15-25° C. Specifically, 100 parts of isocyanate and 1-5 parts of flame retardant are stirred in an inert gas for 8-10 minutes at a stirring rate of 1600-1800 rpm to obtain component B; S3, fully stirring the obtained component A and component B, and after stirring until the two are completely mixed and no particle rods are left, adding carbon nanotubes and modified ultrafine glass fibers and stirring; S4, inject the prepared raw materials into a high shear mixer at a stirring speed of 2000-2500 rpm, stir for 5-10 minutes, and then spray them into the mold with a gun for foaming; In S3, component A was added to the high shear mixer in three batches, with an interval of 1-2 min between each addition; S5, the foamed material is subjected to pressure stabilization and shaping by a mold, and is cooled after shaping, and is cut with a water jet cutting machine after cooling; S6. The cut pieces are transported to a drying line for drying at a temperature of 125-150° C. for 3-5 hours. After drying, the pieces are rolled up to obtain insoles.

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