CN102108117B - Method for preparing ultra-soft low-density sponge - Google Patents
Method for preparing ultra-soft low-density sponge Download PDFInfo
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- CN102108117B CN102108117B CN2011100008387A CN201110000838A CN102108117B CN 102108117 B CN102108117 B CN 102108117B CN 2011100008387 A CN2011100008387 A CN 2011100008387A CN 201110000838 A CN201110000838 A CN 201110000838A CN 102108117 B CN102108117 B CN 102108117B
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- density sponge
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a method for preparing ultra-soft low-density sponge, which comprises: delivering 100 weight parts of polyether and 55 to 65 weight parts of toluene diisocynate, which serve as raw materials, to a mixing head, adding 4 to 5 weight parts of chemical foaming agent, 0.4 to 0.6 weight parts of foaming catalyst and 2 to 3 weight parts of foam stabilizer into the mixing head, and stirring for 5 to 10 minutes in an environment at 20 to 25 DEG C; conveying the uniformly mixed raw material to an overflowing tank in a vacuum closed container through a pipe to perform a foaming reaction in a vacuum environment; and foaming the mixed raw material flowing from the overflowing tank through the conveying by a conveyor belt, and keeping the foaming temperature between 60 and 130 DEG C for 3 to 5 minutes to obtain the ultra-soft low-density sponge. The sponge prepared under vacuum is low in hardness and density, and because water is used as the chemical foaming gent in a foaming process, the pollution to the environment is reduced.
Description
Technical field
The present invention relates to the preparation method of a kind of sponge, the preparation method of especially a kind of ultra soft low density sponge.
Background technology
At present; Existing preparation sponge is employed in usually and carries out foaming operation under the atmospheric pressure environment, under normal pressure, carries out foaming operation, needs to add some fluorine Lyons and methylene dichloride etc. that human body had harm as frothing aid; Pollution level for environment is bigger like this; And raw materials consumption is higher under normal pressure, simultaneously owing in foaming process, not keeping vacuum, so can in product, produce bubble because of the entering of air in the foaming process; Cause the hole of finished product inhomogeneous, cause an environmental protection treatment difficult problem of bringing because of the cutting waste material in the subsequent process.
Summary of the invention
Deficiency to prior art; The invention provides the preparation method of a kind of ultra soft low density sponge; Utilize the foaming operation that carries out in the normal pressure technology to change in the casing of an airtight vacuum to carry out with existing, fluorine Lyons and the methylene dichloride etc. that in foaming process, adopt vacuum technique to substitute human body is had harm are as frothing aid.
For realizing above-mentioned purpose, the invention provides the preparation method of a kind of ultra soft low density sponge, this preparation method comprises following process step:
(1) polyethers of 100 weight parts and the tolylene diisocyanate of 55～65 weight parts are delivered in the high-pressure mixing head through the pump group as starting material; Toward interior chemical foaming agent, the kicker of 0.4～0.6 weight part and the suds-stabilizing agent of 2～3 weight parts that adds 4～5 weight parts of high-pressure mixing head, under 20～25 ℃ of environment, stirred 5～10 minutes again.
(2) in the overflow groove of starting material in pipe-line transportation to vacuum airtight container that uniform mixing is good, under the environment of negative pressure of vacuum, carry out foamable reaction.
(3) with effusive mixing raw material in the overflow groove, carry foaming through conveying belt, under 60～130 ℃ of conditions of blowing temperature, kept 3～5 minutes, can make ultra soft low-density sponge.
The chemical foaming agent that the present invention can further be set in the said step (1) is a water.
The suds-stabilizing agent that the present invention also can further be set in the said step (1) is a silicone oil.
The kicker that the present invention also can further be set in the said step (1) is the mixture of ammonia and stannous octoate.
The present invention also can further be set to described ammonia and stannous octoate mixed volume than being 2:1～3:1.
With respect to prior art, the present invention has following advantage and beneficial effect:
(1) because under the low more condition of pressure, prepared sponge hardness can reduce accordingly, and density is also low more, so identical raw material is compared prepared sponge under existing normal pressure, the present invention can make the lower sponge of more soft density.
(2) because chemical foaming agent that the present invention adopted is a water, so prior art relatively, can omit fluorine Lyons and methylene dichloride etc. has the use of the frothing aid of pollution to environment, helps reducing in sponge preparing in the process pollution to environment.
(3) because water can be used as chemical foaming agent of the present invention, can be not too much in the process so prepare because of the amount of adding water in sponge, and taking place, sponge burns problems such as core.
(4) sponge that produces 10 density in the prior art needs in the polyethers of 100 weight parts, to add the tolylene diisocyanate of 85～95 weight parts; And the sponge that produces 10 density in the present invention only needs in the polyethers of 100 weight parts, to add the tolylene diisocyanate of 55～65 weight parts; So prior art of comparing; The present invention can reduce raw-material use greatly, has saved production cost.
Embodiment
Below in conjunction with embodiment, the present invention is done detailed description further.Enumerate three specific embodiments below, but the scope that the present invention protected is not limited to the expressed scope of embodiment.
Embodiment 1
The 1st step was delivered to the polyethers of 100 weight parts and the tolylene diisocyanate of 55 weight parts in the high-pressure mixing head through the pump group as starting material; The volume ratio that adds water, 0.4 weight part of 4 weight parts again in the high-pressure mixing head is the ammonia of 2:1 and the mixture of stannous octoate, the silicone oil of 2 weight parts, and stirring is 10 minutes under 20 ℃ of environment.
The 2nd goes on foot in the overflow groove of starting material in pipe-line transportation to vacuum airtight container that uniform mixing is good, under the environment of negative pressure of vacuum, carries out foamable reaction.
The 3rd step flowed to the lamination foaming machine with effusive mixing raw material in the overflow groove through conveying belt, was to keep 5 minutes under 60 ℃ of conditions at blowing temperature, can make ultra soft low-density sponge.
Embodiment 2
The 1st step was delivered to the polyethers of 100 weight parts and the tolylene diisocyanate of 60 weight parts in the high-pressure mixing head through the pump group as starting material; The volume ratio that adds water, 0.5 weight part of 4.5 weight parts again in the high-pressure mixing head is the ammonia of 2.5:1 and the mixture of stannous octoate, the silicone oil of 2.5 weight parts, and stirring is 8 minutes under 22 ℃ of environment.
The 2nd goes on foot in the overflow groove of starting material in pipe-line transportation to vacuum airtight container that uniform mixing is good, under the environment of negative pressure of vacuum, carries out foamable reaction.
The 3rd step flowed to the lamination foaming machine with effusive mixing raw material in the overflow groove through conveying belt, was to keep 4 minutes under 100 ℃ of conditions at blowing temperature, can make ultra soft low-density sponge.
Embodiment 3
The 1st step was delivered to the polyethers of 100 weight parts and the tolylene diisocyanate of 65 weight parts in the high-pressure mixing head through the pump group as starting material; The volume ratio that adds water, 0.6 weight part of 5 weight parts again in the high-pressure mixing head is the ammonia of 3:1 and the mixture of stannous octoate, the silicone oil of 3 weight parts, and stirring is 5 minutes under 25 ℃ of environment.
The 2nd goes on foot in the overflow groove of starting material in pipe-line transportation to vacuum airtight container that uniform mixing is good, under the environment of negative pressure of vacuum, carries out foamable reaction.
The 3rd step flowed to the lamination foaming machine with effusive mixing raw material in the overflow groove through conveying belt, was to keep 3 minutes under 130 ℃ of conditions at blowing temperature, can make ultra soft low-density sponge.
Claims (3)
1. the preparation method of a ultra soft low density sponge, it is characterized in that: this preparation method comprises following process step:
(1) polyethers of 100 weight parts and the tolylene diisocyanate of 55～65 weight parts are delivered in the high-pressure mixing head through the pump group as starting material; Again toward interior chemical foaming agent, the kicker of 0.4～0.6 weight part and the suds-stabilizing agent of 2～3 weight parts that adds 4～5 weight parts of high-pressure mixing head; Under 20～25 ℃ of environment, stirred 5～10 minutes, described kicker is that mixed volume is than the mixture for the ammonia of 2:1～3:1 and stannous octoate;
(2) in the overflow groove of starting material in pipe-line transportation to vacuum airtight container that uniform mixing is good, under the environment of negative pressure of vacuum, carry out foamable reaction;
(3) with effusive mixing raw material in the overflow groove, carry foaming through conveying belt, under 60～130 ℃ of conditions of blowing temperature, kept 3～5 minutes, can make ultra soft low-density sponge.
2. the preparation method of a kind of ultra soft low density sponge according to claim 1 is characterized in that: the chemical foaming agent in the said step (1) is a water.
3. the preparation method of a kind of ultra soft low density sponge according to claim 1 is characterized in that: the suds-stabilizing agent in the said step (1) is a silicone oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100008387A CN102108117B (en) | 2011-01-05 | 2011-01-05 | Method for preparing ultra-soft low-density sponge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100008387A CN102108117B (en) | 2011-01-05 | 2011-01-05 | Method for preparing ultra-soft low-density sponge |
Publications (2)
| Publication Number | Publication Date |
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| CN102108117A CN102108117A (en) | 2011-06-29 |
| CN102108117B true CN102108117B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100008387A Expired - Fee Related CN102108117B (en) | 2011-01-05 | 2011-01-05 | Method for preparing ultra-soft low-density sponge |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104277199A (en) * | 2013-07-01 | 2015-01-14 | 青岛恒山海绵机械有限公司 | Heat-insulation and cold-insulation sponge and preparation method thereof |
| CN106750083A (en) * | 2016-12-28 | 2017-05-31 | 浙江圣诺盟顾家海绵有限公司 | A kind of stretch-proof tears sponge and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05306322A (en) * | 1992-04-30 | 1993-11-19 | Dainippon Ink & Chem Inc | Production of aqueous dispersion of polyurethane |
| CN2905408Y (en) * | 2005-12-01 | 2007-05-30 | 上海胡殷科技服务有限公司 | Foam plastics foaming device |
| CN100419025C (en) * | 2006-10-11 | 2008-09-17 | 武汉理工大学 | Water retaining fertilizer retaining multifunction polymer composite material and its preparation method |
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Granted publication date: 20121114 Termination date: 20140105 |