CN107698728B

CN107698728B - Slow-resilience sponge and preparation method thereof

Info

Publication number: CN107698728B
Application number: CN201710818691.XA
Authority: CN
Inventors: 周志坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-12
Filing date: 2017-09-12
Publication date: 2022-03-08
Anticipated expiration: 2037-09-12
Also published as: CN107698728A

Abstract

The invention discloses a slow rebound sponge, which comprises the following raw materials: 20-70 parts of slow rebound polyether polyol, 20-70 parts of soft foam polyether polyol, 0.1-0.5 part of a pore-forming agent, 1-4 parts of a foaming agent, 25-48 parts of isocyanate, 0.1-0.6 part of a catalyst and 0.2-1 part of a stabilizer, reacting the raw materials to obtain a reticular sponge, and then performing blasting and membrane removal treatment to obtain the hydrophobic slow rebound sponge with a reticular structure with the pore diameter of 1-5 mm; the slow-rebound sponge has excellent rebound, softness, hydrophobicity, quick drying, air permeability and the like, can be washed by water, and does not breed bacteria to influence health.

Description

Slow-resilience sponge and preparation method thereof

Technical Field

The invention relates to the technical field of sponge products, in particular to a hydrophobic breathable slow-rebound sponge and a preparation method thereof.

Background

The slow rebound sponge is also called inert sponge, memory sponge, low rebound sponge, slow elastic cotton and zero pressure feeling sponge. The initial is a high-tech material developed by the U.S. aerospace office for space planning design. The pressure relief device is designed for astronauts and helps to relieve the pressure born by the astronauts in the processes of taking off, landing and flying. Due to the unique pressure relieving characteristic of the slow rebound sponge, the slow rebound sponge is often used for manufacturing household articles such as pillows, mattresses and the like, the slow rebound pillow and the mattress can enable a body to rest at a natural non-pressure position, and the pressure is relieved, so that the slow rebound sponge is the main reason for enabling people to feel comfortable.

When the slow rebound sponge is pressed and deformed by external force, the slow rebound sponge does not rebound immediately, but is delayed for a few seconds and is slowly restored, so that the user can see the fingerprint of the user when pressing the slow rebound sponge by hand, and the user can remember the shape of the slow rebound sponge. The reason for the slow resilience of the slow resilience sponge is mainly that the slow resilience sponge has a special particle structure, namely a honeycomb structure, under a microscope, the smallest unit of the slow resilience sponge consists of tiny cell chamber units, the cell walls of the cells are compact and can contain air, but only micropores are communicated with the outside and other cells, the structure of each cell is very uniform, and the sizes of the micropores are very consistent. The sponge has great difference with the smooth gas or isolation among small units in the common sponge, and the main mechanical property of the slow-rebound sponge is determined by the condition that the gas enters and exits cells under the action of atmospheric pressure. After air is pressed out of cells and the cells are crushed, although the external force is removed, the cell walls also have restoring elasticity, but the air cannot return to the cells quickly because of the tiny vent holes, the cells cannot restore the shape quickly, the resilience force is inhibited, and the time for the material to deform and recover is prolonged.

Although the slow rebound sponge on the market has the slow rebound characteristic, the slow rebound sponge has poor air permeability, and simultaneously absorbs and locks water and is difficult to dry!

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a hydrophobic slow-rebound sponge.

The invention also aims to provide a preparation method of the slow rebound sponge.

In order to achieve the aim, the invention adopts the following technical scheme:

a slow rebound sponge which is a network structure having pores.

Preferably, the pores have a diameter of 1-5 mm.

Preferably, the slow rebound sponge comprises the following raw materials in parts by weight:

further preferably, the slow rebound sponge comprises the following raw materials in parts by weight:

preferably, the hydroxyl value of the slow rebound polyether polyol is in the range of 230-250 mgKOH/g; the hydroxyl value of the general flexible foam polyether polyol is in the range of 53 to 58 mgKOH/g.

Preferably, the cell opener is selected from at least one of polyether polyol Y-1900, GLK15 and 1900G.

Preferably, the isocyanate is toluene diisocyanate and is a mixture of two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, the ratio of the isomers of the former to the isomers of the latter being 100: 0 to 50: between 50. Further preferably, the isocyanate comprises at least one of TDI-80 and TDI-65.

Preferably, the catalyst comprises triethylene diamine and stannous octoate, wherein the weight ratio of triethylene diamine to stannous octoate is 1-3: 1-3.

Preferably, the stabilizer is a highly reactive silicone oil; further preferably, the stabilizer is B8123.

Preferably, the blowing agent is water.

Preferably, the slow rebound polyether polyol is at least one of Y-1030, 3521, GLR-2000, G-2000, BH-1001, BH-1002, 2070.

Preferably, the soft-bubble polyether polyol is at least one of MN-3050D, 5631, 3628 and 560.

The preparation method of the slow rebound sponge comprises the following steps:

(1) mixing slow rebound polyether polyol and soft foam polyether polyol according to a ratio, stirring for 1-3 minutes at a rotation speed of 100-;

(2) mixing water, triethylene diamine and a stabilizer according to a ratio, adding the mixture into the mixture 1, stirring the mixture for 1 to 3 minutes at a rotation speed of 100-;

(3) mixing the pore former and stannous octoate according to the proportion, adding the mixture into the mixture 2, stirring for 1-3 minutes at the rotation speed of 100-;

(4) adding isocyanate into the mixture 3, stirring for 2-5 seconds at the rotation speed of 150-900 rpm, and controlling the temperature to be 17-22 ℃ to obtain a mixture 4;

(5) pouring the mixture 4 into a mold box, wherein the mixture 4 reacts rapidly within 1-10 seconds, and after foaming is finished within 0.5-3 minutes, the mixture reacts to form large-block reticular sponge; the foaming reaction process is a chemical exothermic reaction process;

(6) and (5) blasting and membrane removing treatment is carried out on the reticular sponge obtained in the step (5).

Preferably, the blasting treatment comprises the steps of:

placing the reticular sponge in a blasting sealing box, vacuumizing, introducing hydrogen and oxygen, igniting, burning and blasting after the hydrogen and the oxygen are fully and uniformly mixed in the blasting sealing box, finishing blasting combustion instantly, and melting the film in the pore diameter of the massive sponge when the temperature in the blasting box reaches 80-138 ℃ at the blasting instant; and immediately taking out the reticular slow-resilience big sponge after the blasting is finished, and quickly and naturally cooling to normal temperature to obtain the reticular slow-resilience sponge with the aperture of 1-5 mm.

Further preferably, the volume ratio of the hydrogen gas to the oxygen gas is 1:1 to 1: 1.5.

Further preferably, the reticular hydrophobic breathable slow-recovery sponge can be cut into products with any shapes by a sponge cutting machine according to actual needs.

The invention has the advantages of

1. According to the invention, through the adjustment of the raw materials and the proportion of the slow rebound sponge, the discovery and selection of a specific stabilizer and the adoption of high-activity silicone oil B8123, the obtained slow rebound sponge has excellent rebound performance;

2. according to the invention, through a special preparation process, a specific stabilizer is adopted in a polyurethane foaming process, in each mixing step of the whole operation process, the foaming mixing time is particularly controlled, and the polyurethane foaming process is mixed and stirred at an ultralow rotating speed, and all raw materials in a formula can be prevented from being excessively dispersed due to the adoption of the ultralow rotating speeds and different rotating speeds, so that all mixtures can carry out more violent chemical reaction in foaming heat release forming, and the prepared slow rebound sponge has a net structure with the aperture of 1-5mm, and further has the properties of softness, hydrophobicity, quick drying, air permeability and the like, can be washed by water, and can not be bred with bacteria to influence health;

3. the slow rebound sponge has a porous reticular breathable structure, slow rebound time and proper bearing force, is used for preparing mattresses, pillows, beach hydrophobic chairs and the like, caters to the structure of a human body, and has the effect of eliminating fatigue.

Drawings

FIG. 1 is a top view of a slow rebound sponge of the present invention.

Detailed Description

Example 1

The slow rebound sponge comprises the following raw materials in parts by weight:

(1) mixing Y-1030 and MN-3050D, stirring for 1 minute at the rotating speed of 100rpm, and controlling the temperature to be 17 ℃ to obtain a mixture 1;

(2) mixing water, A-33 and B8123 according to a ratio, adding the mixture into the mixture 1, stirring for 1 minute at a rotating speed of 100rpm, and controlling the temperature to be 17 ℃ to obtain a mixture 2;

(3) mixing Y-1900 and T9 according to a ratio, adding into the mixture 2, stirring at a rotation speed of 100rpm for 1 minute, and controlling the temperature to be 17 ℃ to obtain a mixture 3;

(4) adding TDI-80 into mixture 3, stirring at 150rpm for 2 s, and controlling the temperature to be 17 ℃ to obtain mixture 4;

(5) pouring the mixture 4 into a mold box, quickly reacting within 1-10 seconds, and then completely foaming within 0.5-3 minutes to react into large block-shaped reticular sponge; the reaction process is a chemical exothermic reaction process,

(6) carrying out blasting and membrane removal treatment on the reticular sponge obtained in the step (5), placing the reticular sponge in a blasting seal box, vacuumizing, introducing hydrogen and oxygen in a volume ratio of 1:1.5, carrying out ignition combustion blasting after the hydrogen and the oxygen are fully and uniformly mixed in the blasting seal box, completing blasting combustion instantly, and melting the film in the aperture of the large-block sponge when the temperature in the blasting box reaches 80-138 ℃ at the blasting instant; and (3) immediately taking out the reticular slow-resilience massive sponge after the blasting is finished, and quickly and naturally cooling to normal temperature to obtain the reticular slow-resilience sponge with the aperture ratio of 100 percent and the aperture of about 1 mm.

Example 2

(3) mixing Y-1900 and T9 according to a ratio, adding into the mixture 1, stirring at a rotation speed of 100rpm for 1 minute, and controlling the temperature to be 17 ℃ to obtain a mixture 3;

(6) carrying out blasting and membrane removal treatment on the reticular sponge obtained in the step (5), placing the reticular sponge in a blasting seal box, vacuumizing, introducing hydrogen and oxygen in a volume ratio of 1:1.5, carrying out ignition combustion blasting after the hydrogen and the oxygen are fully and uniformly mixed in the blasting seal box, completing blasting combustion instantly, and melting the film in the aperture of the large-block sponge when the temperature in the blasting box reaches 80-138 ℃ at the blasting instant; and (3) immediately taking out the reticular slow-resilience massive sponge after the blasting is finished, and quickly and naturally cooling to normal temperature to obtain the reticular slow-resilience sponge with the aperture ratio of 100 percent and the aperture of about 4 mm.

Example 3

weighing the raw materials according to the proportion, and preparing the raw materials by the following steps:

(5) pouring the mixture 4 into a mold box, wherein the mixture reacts rapidly within 1-10 seconds, and then after foaming is finished within 0.5-3 minutes, the mixture reacts to form large block-shaped reticular sponge; the reaction process is a chemical exothermic reaction process,

(6) carrying out blasting and membrane removal treatment on the reticular sponge obtained in the step (5), placing the reticular sponge in a blasting seal box, vacuumizing, introducing hydrogen and oxygen in a volume ratio of 1:1.5, carrying out ignition combustion blasting after the hydrogen and the oxygen are fully and uniformly mixed in the blasting seal box, completing blasting combustion instantly, and melting the film in the aperture of the large-block sponge when the temperature in the blasting box reaches 80-138 ℃ at the blasting instant; and (3) immediately taking out the reticular slow-resilience massive sponge after the blasting is finished, and quickly and naturally cooling to normal temperature to obtain the reticular slow-resilience sponge with the aperture ratio of 100 percent and the aperture of about 3 mm.

Example 4

(5) pouring the mixture 4 into a mold box, wherein the mixture reacts quickly within 1-10 seconds, and then after foaming is finished within 0.5-3 minutes, the mixture reacts to form large block-shaped reticular sponge; the reaction process is a chemical exothermic reaction process,

(6) carrying out blasting and membrane removal treatment on the reticular sponge obtained in the step (5), placing the reticular sponge in a blasting seal box, vacuumizing, introducing hydrogen and oxygen in a volume ratio of 1:1.5, carrying out ignition combustion blasting after the hydrogen and the oxygen are fully and uniformly mixed in the blasting seal box, completing blasting combustion instantly, and melting the film in the aperture of the large-block sponge when the temperature in the blasting box reaches 80-138 ℃ at the blasting instant; and (3) immediately taking out the reticular slow-resilience massive sponge after the blasting is finished, and quickly and naturally cooling to normal temperature to obtain the reticular slow-resilience sponge with the aperture ratio of 100 percent and the aperture of about 2 mm.

The slow rebound sponges of examples 1-4 were each tested for performance in a 30X 5cm format at 23 ℃ ambient temperature as follows:

table 1 results of performance testing of the slow rebound sponges of examples 1-4

	Example 1	Example 2	Example 3	Example 4
					Emulsification time(s)	15	12	15	14
Rise time(s)	130	170	125	145
					Density, kg/m³	47	41	50	45
Pore diameter, mm	1	4	3	2
					Rebound time SRT, s	13	9	8	10

The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A hydrophobic slow rebound sponge, wherein the slow rebound sponge is a network structure with pores;

the diameter of the pore is 1-5 mm;

the cell opener comprises at least one of polyether polyol Y-1900, GLK15 and 1900G; the stabilizer is high-activity silicone oil; the stabilizer is B8123; the foaming agent is water.

2. The hydrophobic slow rebound sponge according to claim 1, which comprises the following raw materials in parts by weight:

3. the hydrophobic slow rebound sponge according to claim 1 or 2, wherein the slow rebound polyether polyol has a hydroxyl value in the range of 230-250 mgKOH/g; the hydroxyl value of the flexible foam polyether polyol is in the range of 53-58 mgKOH/g.

4. The hydrophobic slow rebound sponge as set forth in claim 1 or 2, wherein the isocyanate is toluene diisocyanate and is a mixture of two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate, and the ratio of the isomers of the former to the isomers of the latter is 100: 0-50: between 50.

5. The hydrophobic slow rebound sponge according to claim 1 or 2, wherein the catalyst comprises triethylene diamine and stannous octoate, wherein the weight ratio of triethylene diamine to stannous octoate is 1-3: 1-3.

6. The hydrophobic slow rebound sponge according to claim 1 or 2, wherein the slow rebound polyether polyol is at least one of Y-1030, 3521, GLR-2000, G-2000, BH-1001, BH-1002, 2070; the soft-bubble polyether polyol is at least one of MN-3050D, 5631, 3628 and 560.

7. The preparation method of the hydrophobic slow rebound sponge according to any one of claims 1 to 6, which comprises the following steps:

(4) adding isocyanate into the mixture 3, stirring for 2-5 seconds at the rotation speed of 150 revolutions per minute, and controlling the temperature to be 17-22 ℃ to obtain a mixture 4;

(5) pouring the mixture 4 into a mold box, and reacting to obtain large-block reticular sponge;