CN115353603A - Low-air-permeability sponge and manufacturing method thereof - Google Patents
Low-air-permeability sponge and manufacturing method thereof Download PDFInfo
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- CN115353603A CN115353603A CN202211113610.3A CN202211113610A CN115353603A CN 115353603 A CN115353603 A CN 115353603A CN 202211113610 A CN202211113610 A CN 202211113610A CN 115353603 A CN115353603 A CN 115353603A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
- C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2350/00—Acoustic or vibration damping material
Abstract
A sponge with low air permeability and its preparation method are provided. The formula comprises 0 to 0.01 portion of polyether polyol, 99.9 to 100 portions of polymer polyol, 1.5 to 2.3 portions of water, 0.5 to 1.2 portions of foaming stabilizer, 0.1 to 0.2 portion of amine catalyst, 0.1 to 0.3 portion of tin catalyst, 12 to 16 portions of flame retardant, 1.5 to 3.5 portions of flame composite additive and 25 to 35 portions of toluene diisocyanate. The preparation method comprises adjusting the temperature of the raw materials; mixing and foaming the raw materials in a foaming machine; sending the foaming body formed after foaming out of a foaming machine to a cutting machine and cutting the foaming body into blocks; curing the foamed block for 24 hr or more. The advantages are that: the sponge prepared after foaming not only keeps good flame-retardant and fireproof performance, but also has the characteristic of low air permeability; the method is suitable for the one-time pouring foaming (PIP) technology of automobile seat headrests and armrests, and PU films are not needed to be used.
Description
Technical Field
The invention relates to the technical field of manufacturing of polyether polyurethane flexible foam plastics (sponge), in particular to a low-air-permeability sponge suitable for a one-time pouring foaming (PIP) technology of a headrest and an armrest of an automobile seat and a manufacturing method thereof.
Background
PIP technology of head rests or armrests refers to: the surface sleeve of the headrest or the armrest is placed in a mould, liquid raw materials are directly filled into the surface sleeve, and after the liquid raw materials are reacted and formed, the integrated automobile seat headrest or armrest is formed; the material of the face cover is a composite material compounded by a skin material and sponge. The air permeability of the prior sponge is generally 60-160 cc/cm 2 S (JIS K6400-1 7B method), if a protective layer (PU film or PE film) is not attached to the surface of the sponge in contact with the liquid material, the liquid material will penetrate into the sponge and reach the skin material after the liquid material is poured into the mask, resulting in defects on the surface of the product. The polyester sponge meeting the PIP process without attaching a protective layer to the surface of the sponge is available abroad, and the sponge is characterized in that the pore diameter of the pores of the sponge is controlled, so that the difficulty is high. Therefore, the PIP process of the polyester sponge needs to be further improved.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a sponge having a permeability of 30cc/cm or less by controlling the permeability of the sponge 2 And s, so that the sponge with low air permeability can meet the PIP process requirement without adhering a protective layer on the surface of the sponge.
The technical scheme adopted by the invention for solving the technical problems is as follows: this low gas permeability sponge, its characterized in that: the formula of the low-permeability sponge comprises, by weight, 0-0.01 part of polyether polyol, 99.9-100 parts of polymer polyol, 1.5-2.3 parts of water, 0.5-1.2 parts of a foaming stabilizer, 0.1-0.2 part of an amine catalyst, 0.1-0.3 part of a tin catalyst, 12-16 parts of a flame retardant, 1.5-3.5 parts of a flame composite additive and 25-35 parts of toluene diisocyanate, wherein the parts are 100 parts of the total parts of the polyether polyol and the polymer polyol.
As an improvement, the formula of the sponge with low air permeability is preferably 0 part of polyether polyol, 100 parts of polymer polyol, 1.9 parts of water, 0.9 part of foaming stabilizer, 0.15 part of amine catalyst, 0.2 part of tin catalyst, 14 parts of flame retardant, 2.5 parts of flame composite additive and 29 parts of toluene diisocyanate.
In a further refinement, the water may preferably be distilled water.
As a modification, the formula may preferably further comprise 0.1 to 0.5 parts of a coloring agent.
In a further improvement, the colorant may preferably be 0.2 parts.
The second technical problem to be solved by the present invention is to provide a method for manufacturing a sponge with low air permeability suitable for the one-time pouring foaming technology of the headrest and the armrest of the car seat in view of the above-mentioned current technical situation.
The technical scheme adopted by the invention for solving the technical problems is as follows: the manufacturing method of the low-permeability sponge applying the formula is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to ensure that the raw material temperature of the polyether polyol is 19-23 ℃, the raw material temperature of the polymer polyol is 24-28 ℃, and the raw material temperature of the toluene diisocyanate is 19-23 ℃;
2. feeding the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. sending the cut foaming blocks to a foaming block storage rack for curing the foaming blocks, wherein the curing time is more than or equal to 24 hours; namely, the polyether sponge with low air permeability is manufactured.
As a modification, the stirring speed of the mixing head of the foaming machine can be preferably 4300r/min, the pressure of the mixing head can be preferably 1.8bar, and the conveying speed of the conveying belt can be preferably 5.2m/min.
As an improvement, when the formula is fed into the foaming machine in the second step, all the switch valves of the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by the control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula.
As a modification, the raw material temperature of the polyether polyol in the first step may preferably be 21 ℃, the raw material temperature of the polymer polyol may preferably be 26 ℃, and the raw material temperature of the toluene diisocyanate may preferably be 21 ℃.
As a modification, the feeding pressure of the toluene diisocyanate may preferably be 40bar.
Compared with the prior art, the invention has the advantages that: the sponge prepared by adopting special raw materials and a formula, taking polymer polyol and toluene diisocyanate as main raw materials and adding water, a foaming stabilizer, an amine catalyst, a tin catalyst, a flame retardant, a flame composite additive, toluene diisocyanate and a coloring agent in an auxiliary manner retains good flame-retardant and fireproof performance, has the characteristic of low air permeability, and has the air permeability of less than or equal to 30cc/cm 2 S, is very suitable for being applied to the technology of one-time pouring foaming (PIP) of the headrest and the armrest of the automobile seat, and has good application effect; the raw material temperature of polyether polyol, polymer polyol and toluene diisocyanate is adjusted before the sponge is manufactured, so that the raw materials before foaming are prevented from being denatured, the contact efficiency among the raw materials is improved when the raw materials are mixed, and the raw materials are fully mixed and foamed; by adopting the low-air-permeability sponge, when the PIP process is implemented, due to the characteristic of low air permeability, the depth of the added liquid raw material penetrating into the sponge is controlled within 0.2mm, and the appearance of the PIP product is not influenced, so that a PU film is not needed, and the cost is reduced; the prepared surface cover and the foaming body inside the surface cover are really integrated, and the finished product quality of the headrest or the armrest of the automobile seat is improved.
Drawings
FIG. 1 is a flow chart of sponge processing according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following examples of the drawings.
The formula of the low-permeability sponge of the first embodiment comprises 0.01 part of polyether polyol, 99.9 parts of polymer polyol, 2.3 parts of water, 1.2 parts of foaming stabilizer, 0.2 part of amine catalyst, 0.3 part of tin catalyst, 16 parts of flame retardant, 3.5 parts of flame composite additive, 35 parts of toluene diisocyanate and 0.5 part of colorant, wherein the parts are parts by weight.
The water in the formula is distilled water, and the foaming stabilizer is polyether siloxane; the amine catalyst is usually tertiary amine or quaternary ammonium salt; the tin catalyst is stannous octoate; the flame retardant is chloroalkyl phosphite ester; the flame composite additive adopts a flame composite agent FLE200, which is a known technology; the colorant is pigment. Of course, other additives can be used as long as they are suitable for the application.
The preparation method of the sponge with low air permeability comprises the following steps,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to ensure that the raw material temperature of the polyether polyol is 19-23 ℃, the raw material temperature of the polymer polyol is 24-28 ℃, and the raw material temperature of the toluene diisocyanate is 19-23 ℃;
2. feeding all the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. and (4) delivering the cut foaming blocks to a foaming block storage rack for curing the foaming blocks, wherein the curing time is more than or equal to 24 hours.
The stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min. And step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula. The specific internal structure of the foaming machine, the specific structure of the dicer, the specific operation flow of curing the foamed blocks and the specific circuit structure of the control circuit board belong to the prior art, and therefore, the detailed description is omitted. The feed pressure of the toluene diisocyanate was 40bar.
The formula of the low-permeability sponge of the second embodiment comprises 100 parts of polymer polyol, 1.5 parts of water, 0.5 part of foaming stabilizer, 0.1 part of amine catalyst, 0.1 part of tin catalyst, 12 parts of flame retardant, 1.5 parts of flame composite additive and 30 parts of toluene diisocyanate, wherein the parts are parts by weight.
The preparation method of the sponge with low air permeability comprises the following steps,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to enable the raw material temperature of the polyether polyol to be 19-23 ℃, the raw material temperature of the polymer polyol to be 24-28 ℃ and the raw material temperature of the toluene diisocyanate to be 19-23 ℃;
2. feeding the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. and (4) delivering the cut foaming blocks to a foaming block storage rack for curing the foaming blocks, wherein the curing time is more than or equal to 24 hours.
The stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min. And step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula. The specific internal structure of the foaming machine and the specific circuit structure of the control circuit board belong to the prior art, and therefore, detailed description is omitted. The feed pressure of the toluene diisocyanate was 40bar.
The formula of the low-permeability sponge of the third embodiment is that polyether polyol is 0.01 part, polymer polyol is 99.9 parts, water is 1.5 parts, foaming stabilizer is 0.5 part, amine catalyst is 0.1 part, tin catalyst is 0.1 part, flame retardant is 12 parts, flame composite additive is 1.5 parts, toluene diisocyanate is 25 parts, and colorant is 0.1 part, wherein the parts are parts by weight.
The preparation method of the sponge with low air permeability comprises the following steps,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to ensure that the raw material temperature of the polyether polyol is 19-23 ℃, the raw material temperature of the polymer polyol is 24-28 ℃, and the raw material temperature of the toluene diisocyanate is 19-23 ℃;
2. feeding the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. sending the cut foaming blocks to a foaming block storage rack for curing the foaming blocks, wherein the curing time is more than or equal to 24 hours; namely, the polyether sponge with low air permeability is manufactured.
The stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min. And step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula. The specific internal structure of the foaming machine and the specific circuit structure of the control circuit board belong to the prior art, and therefore, detailed description is omitted. The feed pressure of the toluene diisocyanate was 40bar.
As shown in FIG. 1, the formulation of the low permeability sponge of the fourth embodiment is, polymer polyol 100 parts, water 1.9 parts, foam stabilizer 0.9 parts, amine catalyst 0.15 parts, tin catalyst 0.2 parts, flame retardant 14 parts, flame retardant additive 2.5 parts, toluene diisocyanate 29 parts, and colorant 0.2 parts, wherein the parts are parts by weight.
The water in the formula is distilled water, and the foaming stabilizer is polyether siloxane; the amine catalyst is a common tertiary amine or quaternary ammonium salt; the tin catalyst is stannous octoate; the flame retardant is chloroalkyl phosphite ester; the flame composite additive adopts a flame composite agent FLE200, which is a known technology; the colorant is pigment. Of course, other additives can be used as long as they are suitable for the application.
The preparation method of the sponge with low air permeability comprises the following steps,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to ensure that the raw material temperature of the polyether polyol is 19-23 ℃, the raw material temperature of the polymer polyol is 24-28 ℃, and the raw material temperature of the toluene diisocyanate is 19-23 ℃;
2. feeding the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. sending the cut foaming blocks to a foaming block storage rack for foaming block curing, wherein the curing time is more than or equal to 24 hours; thus preparing the polyether sponge with low air permeability.
The stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min. And step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula. The specific internal structure of the foaming machine and the specific circuit structure of the control circuit board belong to the prior art, and therefore, detailed description is omitted. The feed pressure of the toluene diisocyanate was 40bar.
The formula of the low-permeability sponge of the fifth embodiment comprises 0.01 part of polyether polyol, 99.9 parts of polymer polyol, 1.9 parts of water, 0.9 part of foaming stabilizer, 0.15 part of amine catalyst, 0.2 part of tin catalyst, 14 parts of flame retardant, 2.5 parts of flame composite additive, 29 parts of toluene diisocyanate and 0.2 part of colorant, wherein the parts are parts by weight.
The preparation method of the sponge with low air permeability comprises the following steps,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to enable the raw material temperature of the polyether polyol to be 19-23 ℃, the raw material temperature of the polymer polyol to be 24-28 ℃ and the raw material temperature of the toluene diisocyanate to be 19-23 ℃;
2. feeding all the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. and (4) delivering the cut foaming blocks to a foaming block storage rack for curing the foaming blocks, wherein the curing time is more than or equal to 24 hours.
The stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min. And step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula. The specific internal structure of the foaming machine and the specific circuit structure of the control circuit board belong to the prior art, and therefore, detailed description is omitted. The feed pressure of the toluene diisocyanate was 40bar.
The feed pressure of the toluene diisocyanate was 40bar. The unit bar is a commonly used pressure unit, 1 bar (bar) =100 kpa. 4300r/min means 4300 revolutions per minute. The 5.2m/min means 5.2 meters moving per minute. So-called air permeability of 30cc/cm or less 2 S means: the gas passing through the sponge per square centimeter per second is less than or equal to 30 milliliters.
Claims (10)
1. A low air permeability sponge, which is characterized in that: the formula of the low-permeability sponge comprises, by weight, 0-0.01 part of polyether polyol, 99.9-100 parts of polymer polyol, 1.5-2.3 parts of water, 0.5-1.2 parts of a foaming stabilizer, 0.1-0.2 part of an amine catalyst, 0.1-0.3 part of a tin catalyst, 12-16 parts of a flame retardant, 1.5-3.5 parts of a flame composite additive and 25-35 parts of toluene diisocyanate, wherein the parts are 100 parts of the total parts of the polyether polyol and the polymer polyol.
2. The low air permeability sponge according to claim 1, wherein: the formula of the low-permeability sponge comprises 0 part of polyether polyol, 100 parts of polymer polyol, 1.9 parts of water, 0.9 part of foaming stabilizer, 0.15 part of amine catalyst, 0.2 part of tin catalyst, 14 parts of flame retardant, 2.5 parts of flame composite additive and 29 parts of toluene diisocyanate.
3. A low air permeability sponge according to claim 2, wherein: the water is distilled water.
4. The low air permeability sponge according to claim 1, wherein: the formula also comprises 0.1-0.5 part of colorant.
5. The low air permeability sponge of claim 4, wherein: the colorant is 0.2 part.
6. A method of making a low air permeability sponge according to claims 1 to 5, wherein: comprises the following steps of (a) carrying out,
1. adjusting the raw material temperatures of polyether polyol, polymer polyol and toluene diisocyanate to ensure that the raw material temperature of the polyether polyol is 19-23 ℃, the raw material temperature of the polymer polyol is 24-28 ℃, and the raw material temperature of the toluene diisocyanate is 19-23 ℃;
2. feeding all the raw materials into a foaming machine according to a formula, and stirring the raw materials by a mixing head of the foaming machine to mix and foam the raw materials;
3. sending the foaming body formed after foaming out of the foaming machine through a conveying belt of the foaming machine to a cutting machine and cutting the foaming body into blocks;
4. sending the cut foaming blocks to a foaming block storage rack for foaming block curing, wherein the curing time is more than or equal to 24 hours; namely, the polyether sponge with low air permeability is manufactured.
7. The method of manufacturing according to claim 6, wherein: the stirring speed of a mixing head of the foaming machine is 4300r/min, the pressure of the mixing head is 1.8bar, and the conveying speed of a conveying belt is 5.2m/min.
8. The method of manufacturing according to claim 6, wherein: and step two, when the formula is fed into the foaming machine, all the switch valves of all the raw materials entering the foaming machine from the corresponding storage tanks are uniformly controlled by a control circuit board of the foaming machine, and the control circuit board adjusts the discharge flow of the corresponding storage tanks according to the formula.
9. The method of manufacturing according to claim 6, wherein: in the first step, the raw material temperature of the polyether polyol is 21 ℃, the raw material temperature of the polymer polyol is 26 ℃, and the raw material temperature of the toluene diisocyanate is 21 ℃.
10. The method of manufacturing according to claim 6, wherein: the feed pressure of the toluene diisocyanate was 40bar.
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| CN202211113610.3A CN115353603A (en) | 2022-09-14 | 2022-09-14 | Low-air-permeability sponge and manufacturing method thereof |
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| CN202211113610.3A CN115353603A (en) | 2022-09-14 | 2022-09-14 | Low-air-permeability sponge and manufacturing method thereof |
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| JPH07188376A (en) * | 1993-12-27 | 1995-07-25 | Toyo Kuoritei One:Kk | Production of polyurethane foam |
| CN1491244A (en) * | 2001-02-06 | 2004-04-21 | ����Ʒ�ʵ�һ�ɷ�����˾ | Lowly air-permeable flexible polyurethane foam block and process for producing the same |
| CN110862675A (en) * | 2019-11-27 | 2020-03-06 | 湖北世丰汽车内饰有限公司 | Low-air-permeability polyester sponge and preparation method thereof |
| CN114835873A (en) * | 2022-04-20 | 2022-08-02 | 柳州华锡有色设计研究院有限责任公司 | High-resilience polyurethane sponge for automotive interior and preparation method thereof |
| WO2022173532A1 (en) * | 2021-02-10 | 2022-08-18 | Icl-Ip America Inc. | Flame lamination additive for polyurethane foam |
-
2022
- 2022-09-14 CN CN202211113610.3A patent/CN115353603A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07188376A (en) * | 1993-12-27 | 1995-07-25 | Toyo Kuoritei One:Kk | Production of polyurethane foam |
| CN1491244A (en) * | 2001-02-06 | 2004-04-21 | ����Ʒ�ʵ�һ�ɷ�����˾ | Lowly air-permeable flexible polyurethane foam block and process for producing the same |
| CN110862675A (en) * | 2019-11-27 | 2020-03-06 | 湖北世丰汽车内饰有限公司 | Low-air-permeability polyester sponge and preparation method thereof |
| WO2022173532A1 (en) * | 2021-02-10 | 2022-08-18 | Icl-Ip America Inc. | Flame lamination additive for polyurethane foam |
| CN114835873A (en) * | 2022-04-20 | 2022-08-02 | 柳州华锡有色设计研究院有限责任公司 | High-resilience polyurethane sponge for automotive interior and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 程曾越主编: "《通用树脂实用技术手册》", vol. 1, 程曾越主编, pages: 600 * |
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