CN113461897A

CN113461897A - Preparation process of low-rebound breathable sponge

Info

Publication number: CN113461897A
Application number: CN202110718391.0A
Authority: CN
Inventors: 徐建
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-10-01

Abstract

The application provides a preparation technology of low-rebound breathable sponge, which is applied to the field of sponge processing and preparation, and comprises the following ingredients: polyether polyol, deionized water, a foaming agent, a foam stabilizer, a catalyst, modified MDI, isocyanate, a stabilizer, a dispersant and a chain extender; stirring: mixing the ingredients of the components in the S1 in proportion, placing the mixture in a reaction kettle, and stirring the ingredients at 3000-; freezing: introducing the stirred ingredients in the step S2 into a static mixer, and freezing the static mixer in a freezer at-20 ℃ for 5-10 min; removing the static mixer from the freezer; possess the density that solves present low bounce-back ventilative sponge and can not solve and too high can influence the constant temperature attribute of the low bounce-back ventilative sponge itself after the foaming to in the foaming stage, if the step is handled badly, can influence the honeycomb structure of low bounce-back ventilative sponge, lead to the destroyed technical problem of the wholeness of low bounce-back ventilative sponge.

Description

Preparation process of low-rebound breathable sponge

Technical Field

The application relates to the technical field of sponge processing and preparation, in particular to a preparation process of a low-rebound breathable sponge.

Background

The sponge is a porous material, has good water absorption and can be used for cleaning articles;

sponges commonly used by people are made of wood cellulose fibers or foamed plastic polymers; in addition, there are also natural sponges made of sponge animals, most of which are used for body cleaning or painting; in addition, there are three types of synthetic sponges made of other materials, respectively low-density polyether (non-absorbent sponge), polyvinyl alcohol (high-absorbent material, without significant pores) and polyester;

the slow rebound sponge is also called inert sponge, memory sponge, low rebound sponge, slow elastic cotton and zero pressure feeling sponge. According to different processes, the method can be divided into a polyether foaming series and an MDI molding series;

the automation degree of the production of the slow-resilience sponge is very high, and the whole process consists of an automatic control blanking system, a foaming machine, a cutting machine and a computer programming and forming system; the key procedure is in the burdening and foaming stage; the materials are prepared by professional technicians according to the density, the hardness and other parameters required by manufacturers; preparing different foaming time according to the characteristics (density and hardness) of each sponge; the manual operability is not strong, and the quality of the final sponge depends on the quality of the ingredients;

in addition, too much or too little catalyst is added into the low-resilience breathable sponge in the material preparation process, the foaming condition of the material preparation per se can be influenced, the constant temperature property of the low-resilience breathable sponge after foaming can be influenced due to too high density, and in the foaming stage, if the step processing is not good, the honeycomb structure of the low-resilience breathable sponge can be influenced, so that the integrity of the low-resilience breathable sponge is damaged.

Disclosure of Invention

The application aims at solving the constant temperature attribute that the density too high can influence the low ventilative sponge of kick-backing itself after the foaming to in the foaming stage, if the step is handled badly, can influence the honeycomb structure of low ventilative sponge of kick-backing, lead to the destroyed technical problem of the wholeness of low ventilative sponge of kick-backing, provide a preparation technology of low ventilative sponge of kick-backing.

The application adopts the following technical means for solving the technical problems:

a preparation process of a low-rebound air-permeable sponge comprises the following steps:

s1, batching: polyether polyol, deionized water, a foaming agent, a foam stabilizer, a catalyst, modified MDI, isocyanate, a stabilizer, a dispersant and a chain extender;

s2, stirring: mixing the ingredients of the components in the S1 in proportion, placing the mixture in a reaction kettle, and stirring the ingredients at 3000-;

s3, freezing: introducing the stirred ingredients in the step S2 into a static mixer, and freezing the static mixer in a freezer at-20 ℃ for 5-10 min;

s4, foaming: taking out the static mixer from the freezer, placing the static mixer in a vacuum chamber, pumping air in the vacuum chamber through an internal vacuum pump by the vacuum chamber, manufacturing a relative atmospheric pressure environment of 0.1-0.05 Mpa relative to external air pressure for the static mixer in the vacuum chamber, and starting to stand and foam for 30 min;

s5, drying: taking out the ingredients in the static mixer after foaming, and placing the ingredients in a drying chamber to be dried at the temperature of 50-80 ℃;

and S6, obtaining the low-rebound breathable sponge.

Further, the ingredients comprise the following components in percentage by weight: 65-90 parts of polyether polyol, 2-5 parts of deionized water, 2-10 parts of foaming agent, 0.2-0.45 part of foam stabilizer, 0.1-0.3 part of catalyst, 30-45 parts of modified MDI, 0.3-0.8 part of isocyanate, 1-2 parts of stabilizer, 0.5-1 part of dispersant and 5-8 parts of chain extender.

Further, the step of introducing the ingredients stirred in S2 into a static mixer and freezing the static mixer in a freezer at-20 ℃ for 5-10 min comprises:

in the process of freezing in a freezer for 5-10 min, 4-8 parts of liquid carbon dioxide are filled in the static mixer.

Further, the polyether polyols are Mn700 polyether polyol and Mn3000 polyether polyol.

Further, the ingredients also comprise negative oxygen ion particles, and the negative oxygen ion particles are selected from one or more of tourmaline, opal and titanium dioxide.

Further, the chain extender is one of 1, 4-butanediol, 1, 6-hexanediol, trihydroxymethyl propane or diethylene glycol.

Further, the dispersing agent is one of sodium tripolyphosphate, sodium hexametaphosphate or sodium pyrophosphate.

Further, a flame retardant additive is also included in the ingredients, and the flame retardant additive is prepared by the following method:

1. crushing boehmite, brucite and zeolite to 500-700 meshes, adding absolute ethyl alcohol which is 2-2.5 times of the total mass of boehmite, brucite and zeolite after crushing, adding a dispersing agent, uniformly stirring, and then sucking dry the absolute ethyl alcohol;

2. and (3) adding trichlorobromomethane into the product obtained by the treatment in the step (1), and uniformly mixing to obtain the flame retardant additive.

Further, the mixing in the step 2 is ball milling dry mixing for 40-60 minutes at the temperature of 30-40 ℃.

Further, the cleaning agent also comprises 1-5 parts of a nonionic surfactant, wherein the nonionic surfactant is one or more of alkylphenol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, isomeric tridecyl alcohol ether, secondary alcohol polyoxyethylene ether, octanol polyoxyethylene ether, fatty acid methyl ester polyoxyethylene ether, linear-chain deca-alcohol polyoxyethylene ether, linear-chain octa-isooctyl alcohol polyoxyethylene ether and polyoxyethylene sorbitan tristearate

The application provides a preparation technology of a low-rebound breathable sponge, which has the following beneficial effects: preparing materials: polyether polyol, deionized water, a foaming agent, a foam stabilizer, a catalyst, modified MDI, isocyanate, a stabilizer, a dispersant and a chain extender; stirring: mixing the ingredients of the components in the S1 in proportion, placing the mixture in a reaction kettle, and stirring the ingredients at 3000-; freezing: introducing the stirred ingredients in the step S2 into a static mixer, and freezing the static mixer in a freezer at-20 ℃ for 5-10 min; : taking out the static mixer from the freezer, placing the static mixer in a vacuum chamber, pumping air in the vacuum chamber through an internal vacuum pump by the vacuum chamber, manufacturing a relative atmospheric pressure environment of 0.1-0.05 Mpa relative to external air pressure for the static mixer in the vacuum chamber, and starting to stand and foam for 30 min; and (3) drying: taking out the ingredients in the static mixer after foaming, and placing the ingredients in a drying chamber to be dried at the temperature of 50-80 ℃; obtaining the low-rebound breathable sponge; possess the density that solves present low bounce-back ventilative sponge and can not solve and too high can influence the constant temperature attribute of the low bounce-back ventilative sponge itself after the foaming to in the foaming stage, if the step is handled badly, can influence the honeycomb structure of low bounce-back ventilative sponge, lead to the destroyed technical problem of the wholeness of low bounce-back ventilative sponge.

Drawings

Fig. 1 is a flow chart of an embodiment of a process for preparing a low-rebound air-permeable sponge of the present application.

The implementation, functional features and advantages of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terms "comprises," "comprising," and "having" and any variations thereof in the description and claims of this application and the drawings described above are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. In the claims, the description and the drawings of the specification of the present application, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity/action/object from another entity/action/object without necessarily requiring or implying any actual such relationship or order between such entities/actions/objects.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, a flow chart of a process for preparing a low-rebound air-permeable sponge according to an embodiment of the present application is shown;

example one

s2, stirring: mixing the ingredients of the components in the S1 in proportion, placing the mixture in a reaction kettle, and stirring the ingredients in the reaction kettle by 3000 stirring through mechanical stirring and ultrasonic oscillation;

s3, freezing: introducing the stirred ingredients in S2 into a static mixer, and freezing the static mixer in a freezer at-20 deg.C for 5 min;

s4, foaming: taking out the static mixer from the freezer, placing in a vacuum chamber, pumping air in the vacuum chamber by an internal vacuum pump to make a relative atmospheric pressure environment of 0.1Mpa relative to the external air pressure in the vacuum chamber, and standing for foaming for 30 min;

s5, drying: the ingredients in the static mixer after foaming are taken out and placed in a drying chamber to be dried in an environment of 50 ℃.

And S6, obtaining the low-rebound breathable sponge.

In one embodiment, the ingredients comprise the following components in percentage by weight: 65 parts of polyether polyol, 2 parts of deionized water, 2 parts of a foaming agent, 0.2 part of a foam stabilizer, 0.1 part of a catalyst, 45 parts of modified MDI, 0.3 part of isocyanate, 1 part of a stabilizer, 0.5 part of a dispersant and 5 parts of a chain extender.

In one embodiment, the step of freezing the ingredients stirred in S2 in a freezer at-20 ℃ for 5min comprises:

during the 5min of freezer freezing, a static mixer was charged with 4 parts of liquid carbon dioxide.

In one embodiment, the polyether polyols are Mn700 polyether polyol and Mn3000 polyether polyol.

In one embodiment, the chain extender is one of 1, 4-butanediol, 1, 6-hexanediol, trihydroxymethylpropane, or diethylene glycol.

In one embodiment, the dispersant is one of sodium tripolyphosphate, sodium hexametaphosphate, or sodium pyrophosphate.

Specifically, when the deionized water is 2 parts, the foaming agent is 2 parts, and when the mixture is placed in a static mixer for foaming, the honeycomb structure of the whole mixture is relatively weak, but the reaction time is short, so that the method can be used for preparing the quickly-formed low-rebound breathable sponge;

when the honeycomb structure is relatively fragile, the cellular structure is closed, and the water absorption performance is good;

has certain corrosion resistance: the paint is resistant to corrosion of chemicals such as seawater, grease, acid, alkali and the like, and is antibacterial, nontoxic, tasteless and pollution-free;

vibration prevention: the rebound resilience and the tensile strength are weaker, and the toughness is weak;

excellent heat insulation, heat preservation, cold protection and low temperature performance, and can resist severe cold and solarization.

The sound insulation effect is general due to the closed cells.

Example two

s2, stirring: mixing the ingredients of the components in the S1 in proportion, placing the mixture into a reaction kettle, and stirring the ingredients at 5000r/min in the reaction kettle through mechanical stirring and ultrasonic oscillation;

s3, freezing: introducing the stirred ingredients in S2 into a static mixer, and freezing the static mixer in a freezer at-20 deg.C for 10 min;

s4, foaming: taking out the static mixer from the freezer, placing in a vacuum chamber, pumping air in the vacuum chamber by an internal vacuum pump to make a relative atmospheric pressure environment of 0.05Mpa relative to the external air pressure in the vacuum chamber, and standing for foaming for 30 min;

s5, drying: the ingredients in the static mixer after foaming are taken out and placed in a drying chamber to be dried in an environment of 80 ℃.

And S6, obtaining the low-rebound breathable sponge.

In one embodiment, the ingredients comprise the following components in percentage by weight: 90 parts of polyether polyol, 5 parts of deionized water, 10 parts of a foaming agent, 0.45 part of a foam stabilizer, 0.3 part of a catalyst, 45 parts of modified MDI, 0.8 part of isocyanate, 2 parts of a stabilizer, 1 part of a dispersant and 8 parts of a chain extender.

In one embodiment, the step of freezing the ingredients stirred in S2 in a freezer at-20 ℃ for 10min comprises:

during the freezing process in the freezer for 10min, 8 parts of liquid carbon dioxide were charged into the static mixer.

Specifically, when the deionized water is 5 parts, 10 parts of foaming agent can cause the honeycomb structure of the whole ingredients to be relatively hard when the ingredients are kept standing and foamed in a static mixer, but the honeycomb structure is longer than the reaction time, so that the honeycomb structure can be used for preparing low-rebound breathable sponge with the required quality;

when the honeycomb structure is relatively hard, the cellular structure is closed, and the water absorption performance is good;

vibration prevention: the rebound resilience and the tensile strength are strong, and the toughness is strong;

The sealed foam hole has good sound insulation effect.

EXAMPLE III

s2, stirring: mixing the ingredients of the S1 components in proportion, placing the mixture into a reaction kettle, and stirring the ingredients at 4500r/min in the reaction kettle through mechanical stirring and ultrasonic oscillation;

s3, freezing: introducing the stirred ingredients in S2 into a static mixer, and freezing the static mixer in a freezer at-20 deg.C for 8 min;

s4, foaming: taking out the static mixer from the freezer, placing in a vacuum chamber, pumping air in the vacuum chamber by an internal vacuum pump to make a relative atmospheric pressure environment of 0.08MPa relative to the external air pressure for the static mixer in the vacuum chamber, and standing for foaming for 30 min;

s5, drying: the ingredients in the static mixer after foaming were taken out and placed in a drying chamber to be dried at 65 ℃.

And S6, obtaining the low-rebound breathable sponge.

In one embodiment, the ingredients comprise the following components in percentage by weight: 80 parts of polyether polyol, 4 parts of deionized water, 5 parts of foaming agent, 0.3 part of foam stabilizer, 0.2 part of catalyst, 40 parts of modified MDI, 0.5 part of isocyanate, 1.5 parts of stabilizer, 0.8 part of dispersant and 6.5 parts of chain extender.

In one embodiment, the step of freezing the ingredients stirred in S2 in a freezer at-20 ℃ for 8min comprises:

during the freezing process in the freezer for 8min, 5 parts of liquid carbon dioxide are charged into the static mixer.

Specifically, when the deionized water is 5 parts, 10 parts of foaming agent can cause the honeycomb structure of the whole ingredient to be relatively hard when the ingredient is kept standing and foaming in a static mixer, but the honeycomb structure is longer than the reaction time, so that the honeycomb structure can be used for preparing low-rebound breathable sponge with the requirements of general quality molding and moderate molding time;

The sealed foam hole has good sound insulation effect.

Example four

The ingredients also comprise negative oxygen ion particles, and the negative oxygen ion particles are selected from one or more of tourmaline, opal and titanium dioxide.

Specifically, negative oxygen ion particles can be uniformly distributed in the molded low-rebound air-permeable sponge, and meanwhile, negative oxygen ions are released to the maximum extent without using auxiliary materials of the negative oxygen ions.

EXAMPLE five

The ingredients also comprise a flame retardant additive, and the flame retardant additive is prepared by the following method:

In one embodiment, the mixing in step 2 is ball milling and dry mixing at 30-40 ℃ for 40-60 minutes.

Specifically, the flame retardant performance is tested and evaluated by using a UL94 flame retardant fire rating test and standard, wherein the polyether polyurethane sponge in the embodiment can meet the flame retardant requirement of V0 level; the rebound rate test adopts the ISO8307-2008 test machine standard to test, and has the function of preventing the risk of spontaneous combustion of the ingredients at the temperature of over 170 ℃ in the foaming process.

EXAMPLE six

The detergent composition further comprises 1-5 parts of a nonionic surfactant, wherein the nonionic surfactant is one or more of alkylphenol polyoxyethylene, lauryl alcohol polyoxyethylene, isomeric tridecyl alcohol ether, secondary alcohol polyoxyethylene, octanol polyoxyethylene, fatty acid methyl ester polyoxyethylene, linear-chain deca-alcohol polyoxyethylene, linear-chain octa-isooctanol polyoxyethylene and polyoxyethylene sorbitan tristearate.

Particularly, the water absorption performance of the low-rebound breathable sponge can be improved, the sponge has the characteristics of high water absorption rate, high water absorption speed, high water retention capacity and excellent liquid diffusion and passing performance, the water absorption capacity is high, and when the sponge is acted by external force, the sponge is not easy to dehydrate and has good water retention.

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

Claims

1. A preparation process of a low-rebound breathable sponge is characterized by comprising the following steps:

and S6, obtaining the low-rebound breathable sponge.

2. The preparation process of the low-rebound breathable sponge as claimed in claim 1, wherein the ingredients comprise the following components in parts by weight: 65-90 parts of polyether polyol, 2-5 parts of deionized water, 2-10 parts of foaming agent, 0.2-0.45 part of foam stabilizer, 0.1-0.3 part of catalyst, 30-45 parts of modified MDI, 0.3-0.8 part of isocyanate, 1-2 parts of stabilizer, 0.5-1 part of dispersant and 5-8 parts of chain extender.

3. The process for preparing the low-bounce breathable sponge according to claim 1, wherein the step of introducing the ingredients stirred in S2 into a static mixer and freezing the static mixer in a freezer at-20 ℃ for 5-10 min comprises:

4. The process for preparing a low-bounce breathable sponge according to claim 1, wherein the polyether polyol is Mn700 polyether polyol and Mn3000 polyether polyol.

5. The process for preparing the low-bounce breathable sponge according to claim 1, wherein the ingredients further comprise negative oxygen ion particles selected from one or more of tourmaline, opal and titanium dioxide.

6. The process for preparing the low-rebound air-permeable sponge according to claim 1, wherein the chain extender is one of 1, 4-butanediol, 1, 6-hexanediol, trihydroxymethyl propane or diethylene glycol.

7. The preparation process of the low-rebound air-permeable sponge according to claim 1, wherein the dispersant is one of sodium tripolyphosphate, sodium hexametaphosphate or sodium pyrophosphate.

8. The process for preparing a low-bounce breathable sponge according to claim 1, characterized in that said ingredients further comprise a flame retardant additive, said flame retardant additive being prepared by the following method:

9. The preparation process of the low-bounce breathable sponge according to claim 8, wherein the mixing in the step 2 is ball-milling dry-mixing at a temperature of 30-40 ℃ for 40-60 minutes.

10. The preparation process of the low-rebound air-permeable sponge according to claim 1, further comprising 1-5 parts of a nonionic surfactant, wherein the nonionic surfactant is one or more of alkylphenol polyoxyethylene, lauryl alcohol polyoxyethylene, isotridecyl alcohol ether, secondary alcohol polyoxyethylene, octanol polyoxyethylene, fatty acid methyl ester polyoxyethylene, linear deca-alcohol polyoxyethylene, linear octa-isooctanol polyoxyethylene, and polyoxyethylene sorbitan tristearate.