Sponge with high toughness as well as preparation method and application thereof

Abstract

The invention relates to sponge with high toughness as well as a preparation method and application thereof, belongs to the field of mattress materials, and provides sponge with high toughness aiming at the problem that the service life is relatively short due to the fact that the existing sponge is easy to damage and break. The sponge with high toughness is prepared from the following raw materials in parts by mass: 100 parts of polyhydric alcohol; isocyanate, the index of which is 0.85 to 1.05; 0.2 to 0.6 part of an amine catalyst; 0.05 to 0.3 part of a metal catalyst; 0.3 to 1.5 parts of an organosilicon foam stabilizer; 1.2 to 4.5 parts of water; 0.8-3 parts of a tension agent; wherein the hydroxyl value of the polyether polyol is 20 to 80. The sponge is good in fracture and tensile property, not prone to fracture or tearing due to long-term use, high in structural stability, not prone to destructive change inside, excellent in tensile property, capable of keeping the shape and the function under high load and frequent use, and not prone to collapse or deformation due to long-term use. And the service life of the mattress is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of mattress materials, and particularly relates to a sponge with strong toughness and a preparation method and application thereof. Background Art

[0002] Existing sponges have good elasticity and shock resistance. Due to the soft material characteristics of ordinary sponges, they are more likely to collapse, so their service life is relatively short. The value range of the conventional sponge fracture elongation test is 140-230. It is easy to be damaged and broken during use. When used as a mattress, its service life is correspondingly short. Summary of the invention

[0003] In view of the problem that existing sponges are easily damaged and broken, resulting in a short service life, the present invention provides a sponge with strong toughness and a preparation method and application thereof, and a sponge with good toughness and meeting use requirements is prepared by adding a tensile agent.

[0004] The technical solution adopted by the present invention is as follows: a sponge with strong toughness, the raw materials include by weight:

[0005] Polyol, 100 parts;

[0006] Isocyanate, index 0.85-1.05;

[0007] Amine catalyst, 0.2-0.5 parts;

[0008] Metal catalyst, 0.05-0.3 parts;

[0009] Silicone foam stabilizer, 0.3-1.5 parts;

[0010] Water, 1.2-4.5 parts;

[0011] Tensile agent, 0.8-3 parts;

[0012] Wherein, the hydroxyl value of the polyol is 20-80.

[0013] The tensile agent can form a cross-linked structure between the raw materials used to prepare the sponge, significantly enhancing the tensile strength and tear strength of the sponge, thereby helping to extend the service life of the sponge product and reduce the frequency and cost of replacement.

[0014] Furthermore, the raw materials of the tensioning agent are as follows: 900-1200 parts of polyether polyol, 50-70 parts of cross-linking agent, 300-350 parts of isocyanate, and 5-10 parts of alkaline auxiliary agent by mass. The tensioning agent used in the present application is a liquid organic matter, which can be fully mixed with other raw materials to ensure the uniform performance of the tough sponge of the present application.

[0015] Furthermore, the polyol includes one or more of high-activity polyether polyol, ordinary polyether polyol, and grafted polyether polyol. High-activity polyether polyol (HAPP) is a polyol based on epoxy value. Compared with polyester polyol, it has the characteristics of strong reactivity, good toughness, good processing performance, and low cost. Its molecule contains multiple hydroxyl groups, which make it highly reactive and can undergo a variety of chemical reactions with other compounds. Ordinary polyether polyol has the advantages of abundant raw materials, good processing performance, excellent physical properties, high chemical stability, environmental friendliness, wide application fields, and high cost-effectiveness.

[0016] Furthermore, the isocyanate is at least one of industrial grade TDI-80 and MDI.

[0017] Further, the organosilicon foam stabilizer is one or more of BF2370, B8295, and C8139. The organosilicon foam stabilizer can significantly reduce the surface tension of the foaming liquid, thereby generating a large number of small and evenly distributed bubbles. Under the action of the stabilizer, these bubbles can maintain stability for a long time and are not easy to break and collapse. At the same time, it can also automatically repair the weak points of the pore wall, further enhancing the stability and durability of the foam. During the foaming process, the organosilicon foam stabilizer can emulsify and solubilize various raw materials, making the chemical reaction between them more uniform and effective. This helps to generate foam plastics with excellent pore structure, mechanical strength, air permeability and thermal conductivity. In addition, it can also improve the elasticity and tension of the foam, so that it has better physical properties and service life. The use of organosilicon foam stabilizer can significantly improve production efficiency. Since it can stabilize the foam structure and improve the foaming quality, it can reduce the scrap rate and rework rate in the production process. At the same time, it can also improve the utilization rate and automation of equipment, and reduce production costs and energy consumption.

[0018] Furthermore, the elongation at break of the tough sponge is 300-360. The sponge has good fracture and tensile properties, which means that its structure is stronger and is not easy to break or tear due to long-term use, which can greatly extend the service life of the mattress. The structural stability is strong, and the sponge is not easy to tear or break when subjected to external forces, which can ensure that the mattress maintains a stable structure under various conditions of use and prevent destructive changes inside the mattress. It has excellent tensile properties and can maintain its shape and function under high loads and frequent use, and will not collapse or deform due to long-term use. The package can quickly return to its original shape after compression or stretching, ensuring that the mattress provides consistent support and comfort every time it is used.

[0019] The present application also proposes a sponge with strong toughness and a preparation method thereof, comprising the following steps:

[0020] Step 1, preparing a tensioning agent: stirring the tensioning agent raw materials according to the mass fractions to react evenly, and then obtaining a liquid tensioning agent, and then sealing it for standby use;

[0021] Step 2, mixing and stirring: mixing and stirring the raw materials according to the raw material components of the above-mentioned sponge with strong toughness;

[0022] Step 3, foaming: the mixture is poured into a mold, foaming is completed, and after ripening, a high-toughness sponge is obtained.

[0023] The liquid tensile agent can fully contact and react with the raw materials of the sponge, so that the worthy product has more ideal toughness and strength and can meet the use requirements.

[0024] The present application also protects the application of a sponge with high toughness in mattresses.

[0025] The beneficial effects of the present invention are as follows: the present application is a sponge with strong toughness and its preparation method and application. The obtained sponge has good breaking and tensile properties, is not easy to break or tear due to long-term use, has strong structural stability, is not easy to undergo destructive changes inside, has excellent tensile properties, can maintain its shape and function under high loads and frequent use, and will not collapse or deform due to long-term use; in addition, the sponge of the present application has an ideal service life when used as a mattress. DETAILED DESCRIPTION

[0026] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0027] Example 1

[0028] A sponge with strong toughness, the raw materials include by weight:

[0029] Highly active polyether polyol, 60 parts;

[0030] Grafted polyether polyol, 20 parts;

[0031] Ordinary polyether polyol, 20 parts;

[0032] Isocyanate TDI-80 index, 100;

[0033] Amine catalyst, 0.35 parts;

[0034] Metal catalyst, 0.1 part;

[0035] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0036] Silicone foam stabilizer B8295, 0.5 parts

[0037] Water, 2.9 parts;

[0038] Tensile agent, 0.8 parts;

[0039] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0040] The preparation method is:

[0041] Step 1, preparing a tensioning agent: the raw materials of the tensioning agent are as follows by mass: 1000 parts of polyether polyol, 50 parts of triethanolamine, 300 parts of isocyanate (TDI-80), and 5 parts of NaOH; fully stirring and reacting to obtain a liquid tensioning agent, which is sealed and stored for later use;

[0042] Step 2, mixing and stirring: mixing and stirring the raw materials according to the above mass parts;

[0043] Step 3, foaming: the mixture is poured into a mold, foaming is completed, and after ripening, a high-toughness sponge is obtained.

[0044] Example 2

[0045] A sponge with strong toughness, the raw materials include by weight:

[0046] Highly active polyether polyol, 60 parts;

[0047] Grafted polyether polyol, 20 parts;

[0048] Ordinary polyether polyol, 20 parts;

[0049] Isocyanate TDI-80 index, 100;

[0050] Amine catalyst, 0.35 parts;

[0051] Metal catalyst, 0.1 part;

[0052] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0053] Silicone foam stabilizer B8295, 0.5 parts;

[0054] Water, 2.9 parts;

[0055] Tensile agent, 1 part;

[0056] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0057] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0058] Example 3

[0059] A sponge with strong toughness, the raw materials include by weight:

[0060] Highly active polyether polyol, 60 parts;

[0061] Grafted polyether polyol, 20 parts;

[0062] Ordinary polyether polyol, 20 parts;

[0063] Isocyanate TDI-80 index, 100;

[0064] Amine catalyst, 0.35 parts;

[0065] Metal catalyst, 0.1 part;

[0066] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0067] Silicone foam stabilizer B8295, 0.5 parts

[0068] Water, 2.9 parts;

[0069] Tension agent, 2 parts;

[0070] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0071] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0072] Example 4

[0073] A sponge with strong toughness, the raw materials include by weight:

[0074] Highly active polyol, 60 parts;

[0075] Grafted polyether polyol, 20 parts;

[0076] Ordinary polyether polyol, 20 parts;

[0077] Isocyanate TDI-80 index, 100;

[0078] Amine catalyst, 0.35 parts;

[0079] Metal catalyst, 0.1 part;

[0080] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0081] Silicone foam stabilizer B8295, 0.5 parts

[0082] Water, 2.9 parts;

[0083] tension agent, 3 parts;

[0084] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0085] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0086] Example 5

[0087] A sponge with strong toughness, the raw materials include by weight:

[0088] Highly active polyol, 60 parts;

[0089] Grafted polyether polyol, 20 parts;

[0090] Ordinary polyether polyol, 20 parts;

[0091] Isocyanate TDI-80 index, 105;

[0092] Amine catalyst, 0.3 parts;

[0093] Metal catalyst, 0.05 parts;

[0094] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0095] Silicone foam stabilizer B8295, 0.5 parts;

[0096] Water, 2.9 parts;

[0097] Tensile agent, 1.5 parts;

[0098] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0099] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0100] Example 6

[0101] A sponge with strong toughness, the raw materials include by weight:

[0102] Highly active polyol, 60 parts;

[0103] Grafted polyether polyol, 20 parts;

[0104] Ordinary polyether polyol, 20 parts;

[0105] Isocyanate MDI index, 85;

[0106] Amine catalyst, 0.3 parts;

[0107] Metal catalyst, 0.05 parts;

[0108] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0109] Silicone foam stabilizer B8295, 0.5 parts;

[0110] Water, 2.9 parts;

[0111] Tensile agent, 1.5 parts;

[0112] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0113] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0114] Example 7

[0115] A sponge with strong toughness, the raw materials include by weight:

[0116] Highly active polyol, 60 parts;

[0117] Grafted polyether polyol, 20 parts;

[0118] Ordinary polyether polyol, 20 parts;

[0119] Isocyanate TDI-80 index, 105;

[0120] Amine catalyst, 0.4 parts;

[0121] Metal catalyst, 0.2 parts;

[0122] Silicone foam stabilizer C8139, 1.0 part;

[0123] Water, 3.0 parts;

[0124] Tension agent, 2 parts;

[0125] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0126] Except for the different raw material components, the rest of the preparation process is the same as Example 1.

[0127] Example 8

[0128] A sponge with strong toughness, the raw materials include by weight:

[0129] Highly active polyol, 60 parts;

[0130] Grafted polyether polyol, 20 parts;

[0131] Ordinary polyether polyol, 20 parts;

[0132] Isocyanate TDI-80 index, 85;

[0133] Amine catalyst, 0.5 parts;

[0134] Metal catalyst, 0.05 parts;

[0135] Silicone foam stabilizer C8139, 0.3 parts;

[0136] Water, 1.2 parts;

[0137] Tensile agent, 1.0 part;

[0138] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0139] The preparation method is:

[0140] Step 1, preparing a tensioning agent: the raw materials of the tensioning agent are as follows by mass: 1200 parts of polyether polyol, 50 parts of triethanolamine, 350 parts of isocyanate (TDI-80), and 10 parts of NaOH; fully stirring and reacting to obtain a liquid tensioning agent, which is sealed and stored for standby use;

[0141] Step 2, mixing and stirring: mixing and stirring the raw materials according to the above mass parts;

[0142] Step 3, foaming: the mixture is poured into a mold, foaming is completed, and after ripening, a high-toughness sponge is obtained.

[0143] Example 9

[0144] A sponge with strong toughness, the raw materials include by weight:

[0145] Highly active polyol, 60 parts;

[0146] Grafted polyether polyol, 20 parts;

[0147] Ordinary polyether polyol, 20 parts;

[0148] Isocyanate TDI-80 index, 105;

[0149] Amine catalyst, 0.2 parts;

[0150] Metal catalyst, 0.3 parts;

[0151] Silicone foam stabilizer C8139, 1.5 parts;

[0152] Water, 4.5 parts;

[0153] Tensile agent, 3.0 parts;

[0154] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0155] The preparation method is:

[0156] Step 1, preparing a tensioning agent: the raw materials of the tensioning agent are as follows by mass: 1000 parts of polyether polyol, 70 parts of triethanolamine, 350 parts of isocyanate (TDI-80), and 10 parts of NaOH; fully stirring and reacting to obtain a liquid tensioning agent, which is sealed and stored for standby use;

[0157] Step 2, mixing and stirring: mixing and stirring the raw materials according to the above mass parts;

[0158] Step 3, foaming: the mixture is poured into a mold, foaming is completed, and after ripening, a high-toughness sponge is obtained.

[0159] Comparative Example 1

[0160] The raw materials of this embodiment include by mass:

[0161] Highly active polyether polyol, 60 parts;

[0162] Grafted polyether polyol, 20 parts;

[0163] Ordinary polyether polyol, 20 parts;

[0164] Isocyanate TDI-80 index, 100;

[0165] Amine catalyst, 0.3 parts;

[0166] Metal catalyst, 0.15 parts;

[0167] Organic silicon foam stabilizer BF2370, 0.8 parts;

[0168] Silicone foam stabilizer B8295, 0.5 parts

[0169] Water, 2.9 parts;

[0170] Tensile agent, 0 parts;

[0171] The hydroxyl value of the highly active polyether polyol is 40-45, the hydroxyl value of the grafted polyether polyol is 26-30, and the hydroxyl value of the common polyether polyol is 52-58.

[0172] The preparation process is the same as that of Example 1 except that no tension agent is added.

[0173] The performance of the products of Examples 1 to 6 was tested using the "General Flexible Polyurethane Foam Plastics GB / T 10802-2023" standard, and the results are shown in the table.

[0174]

[0175] It can be seen from the table that: 1. By comparing Example 1 with Example 1, the tensile strength and elongation at break of the sponge can be significantly improved by adding a tensile agent. Specifically, the tensile strength is increased from 95Kpa to 108Kpa, and the elongation at break is increased from 180% to 316%.

[0176] 2. To further verify the physical properties of the tensioning agent at different dosages, Examples 2, 3 and 4 were carried out. According to the test data analysis, as the dosage of the tensioning agent increased, the tensile strength increased from 110Kpa to 128Kpa, and the elongation at break increased from 319% to 333%, and all the data increased synchronously.

[0177] 3. To further verify the effect of using different indexes of TDI and MDI in the formulation on the tensile strength, Examples 5 and 6 were carried out. According to the test data analysis, the tensile strength of the MDI system sponge is lower than that of the TDI system, but the elongation at break of both exceeds 300%.

[0178] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A sponge with strong toughness, characterized in that: The raw materials include by mass: Polyol, 100 parts; Isocyanate, index 0.85-1.05; Amine catalyst, 0.2-0.5 parts; Metal catalyst, 0.05-0.3 parts; Silicone foam stabilizer, 0.3-1.5 parts; Water, 1.2-4.5 parts; Tensile agent, 0.8-3 parts; Wherein, the hydroxyl value of the polyol is 20-80.

2. The tough sponge according to claim 1, characterized in that: The raw materials of the tension agent are as follows by mass: 900-1200 parts of polyether polyol, 50-70 parts of cross-linking agent, 300-350 parts of isocyanate, and 5-10 parts of alkaline auxiliary agent.

3. The tough sponge according to claim 1 or 2, characterized in that: The polyol includes one or more of highly active polyether polyol, common polyether polyol and grafted polyether polyol.

4. The tough sponge according to claim 1 or 2, characterized in that: The isocyanate is at least one of industrial grade TDI-80 and MDI.

5. The tough sponge according to claim 1 or 2, characterized in that: The organosilicon foam stabilizer is one or more of BF2370, B8295 and C8139.

6. The tough sponge according to claim 1 or 2, characterized in that: The breaking elongation value of the sponge with strong toughness is 300-360.

7. A method for preparing a sponge with high toughness as claimed in any one of claims 1 to 6, characterized in that: The steps include: Step 1, preparing a tensioning agent: stirring the tensioning agent raw materials according to the mass fractions to evenly react, and then obtaining a liquid tensioning agent, and then sealing it for standby use; Step 2, mixing and stirring: mixing and stirring the raw materials according to the raw material components of the sponge with strong toughness; Step 3, foaming: the mixture is poured into a mold, foaming is completed, and after ripening, a high-toughness sponge is obtained.

8. Use of the highly resilient sponge according to any one of claims 1 to 6 on a mattress.

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