Foaming material for air conditioner color tube and preparation method of foaming material

Abstract

The invention discloses a foaming material for an air conditioner color tube and a preparation method of the foaming material. The foaming material is prepared from the following raw materials in parts by weight: 30 to 50 parts of nitrile rubber, 30 to 40 parts of polyvinyl chloride, 8 to 12 parts of chlorinated polyvinyl chloride, 85 to 125 parts of filler, 25 to 45 parts of foaming agent, 1 to 3 parts of butadiene rubber, 6 to 10 parts of carbon black, 5 to 9 parts of paraffin, 50 to 90 parts of chlorinated paraffin oil, 2 to 3 parts of lubricant, 1 to 2 parts of epoxidized soybean oil, 4 to 6 parts of pigment, 2 to 6 parts of accelerant, 0.2 to 0.7 part of zinc oxide and 0.2 to 0.7 part of vulcanizing agent. The foaming material disclosed by the invention is good in foaming effect, high in tensile strength and elongation at break and strong in compression resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of the preparation of foaming materials, and particularly relates to a foaming material for air-conditioning color tubes and a preparation method thereof. Background Art

[0002] Air-conditioning color tubes generally refer to the colored insulation tubes of air-conditioning refrigerant tubes, and the commonly used foaming materials are mainly rubber and plastic foaming materials. Rubber and plastic foaming materials are widely used in special high-performance heat insulation and insulation fields such as multi-connected units, central air conditioners, and refrigerant tubes. Rubber and plastic foaming materials are mainly made of nitrile rubber and polyvinyl chloride (NBR / PVC) as the main raw materials, and are made through processes such as mixing, kneading, continuous extrusion, heating and foaming, and cooling and cutting. The air-conditioning color tubes have excellent heat insulation performance. Their closed-cell foaming structure results in extremely low thermal conductivity, which can effectively reduce the loss of cold and hot airflows, ensure the stable operation of the air-conditioning system. Their closed-cell structure can also effectively block the penetration of sound waves, reduce noise, and at the same time reduce pipeline vibration, improving the use experience.

[0003] During temperature changes or long-term use of air-conditioning color tubes, the foaming material may shrink or expand, affecting the fitting effect with the air-conditioning tube, and thus reducing the heat insulation performance. The structural limitations of the foaming material result in relatively poor strength and wear resistance, and it is easy to be damaged during installation or use. During the foaming process, internal pores or silver streaks may be caused by gas interference (such as water vapor, decomposition gas, etc.), affecting the integrity and performance of the material, and appearance problems such as shrinkage holes, unclear patterns, and surface bubbles may also occur, affecting the product quality and aesthetics. Existing foaming materials may release volatile organic compounds during production and use, causing potential impacts on the environment and human health. Summary of the Invention

[0004] The purpose of the present invention is to provide a foaming material for air-conditioning color tubes and a preparation method thereof.

[0005] A foaming material for air-conditioning color tubes comprises the following raw materials in parts by weight: 30-50 parts of nitrile rubber, 30-40 parts of polyvinyl chloride, 8-12 parts of chlorinated polyvinyl chloride, 85-125 parts of filler, 25-45 parts of foaming agent, 1-3 parts of cis-butadiene rubber, 6-10 parts of carbon black, 5-9 parts of paraffin wax, 50-90 parts of chlorinated paraffin oil, 2-3 parts of lubricant, 1-2 parts of epoxy soybean oil, 4-6 parts of pigment, 2-6 parts of accelerator, 0.2-0.7 parts of zinc oxide, and 0.2-0.7 parts of vulcanizing agent.

[0006] The filler comprises the following components in parts by weight: 50 parts of kaolin, 45 parts of calcium carbonate, and 10 parts of talcum powder.

[0007] The filler is a mixture of mullite powder and analcime powder mixed in a mass ratio of 1:2.

[0008] The blowing agent is a mixture of dinitropentamethylenetetramine and 4,4'-sulfonyldiphenyl ether hydrazide in a mass ratio of 2:1.

[0009] The lubricant is one or more of stearic acid, zinc stearate, and 2-(pentaerythritol triisooctanoate) adipate.

[0010] The pigment is one or more of titanium dioxide, iron oxide red, iron oxide yellow, iron oxide black, pigment yellow 13, and pigment orange 13.

[0011] The accelerator includes the following components in parts by weight: 1.5 - 4.5 parts of accelerator PZ (zinc dimethyldithiocarbamate), 0.3 - 0.7 parts of accelerator ZBS (zinc benzenesulfinate), and 0.3 - 0.7 parts of accelerator DPTT (tetrasulfide bis(pentamethylene thiuram)).

[0012] The vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin in a mass ratio of 2:1.

[0013] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0014] (1) According to parts by weight, take 30 - 50 parts of nitrile rubber, 30 - 40 parts of polyvinyl chloride, 8 - 12 parts of chlorinated polyvinyl chloride, 85 - 125 parts of filler, 25 - 45 parts of blowing agent, 1 - 3 parts of cis-1,4-polybutadiene rubber, 6 - 10 parts of carbon black, 5 - 9 parts of paraffin wax, 50 - 90 parts of chlorinated paraffin oil, 2 - 3 parts of lubricant, 1 - 2 parts of epoxidized soybean oil, 4 - 6 parts of pigment, and 0.2 - 0.7 parts of zinc oxide, add them to an internal mixer, and mix for 10 - 15 min at 130 - 180 °C;

[0015] (2) Add 2 - 6 parts of accelerator and 0.2 - 0.7 parts of vulcanizing agent to the material prepared in step (1), send it to a two-roll mill for mixing for 5 - 10 min, cool it to room temperature, and then send it to an extruder for extrusion molding;

[0016] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming;

[0017] (4) Cool the molded foaming material prepared in step (3) to room temperature, cut it into finished foaming materials with a length of 3 - 20 m, and then package and store them in a warehouse.

[0018] The head temperature of the extruder described in step (2) is set at 40 - 60 °C; the oven described in step (3) is divided into 8 vulcanization temperature zones: Zone 1 at 105 - 115 °C, with a material passing speed of 2.5 - 3.0 m / min; Zone 2 at 115 - 125 °C, with a material passing speed of 3.2 - 3.5 m / min; Zone 3 at 125 - 135 °C, with a material passing speed of 3.8 - 4.0 m / min; Zone 4 at 135 - 145 °C, with a material passing speed of 4.5 - 5.0 m / min; Zone 5 at 145 - 155 °C, with a material passing speed of 5.5 - 6.0 m / min; Zone 6 at 155 - 165 °C, with a material passing speed of 6.5 - 7.0 m / min; Zone 7 at 165 - 175 °C, with a material passing speed of 7.5 - 8.5 m / min; Zone 8 at 170 - 180 °C, with a material passing speed of 9.0 - 10.0 m / min.

[0019] Advantages of the present invention: The foaming material of the present invention uses nitrile rubber, polyvinyl chloride, and chlorinated polyvinyl chloride as the main materials, and the performance of the materials is excellent. The foaming agent uses a foaming agent composed of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonyl hydrazide) in combination, with good foaming effect and reduced material density; the vulcanizing agent uses insoluble sulfur IS-60 and SP1045 phenolic resin complex, which improves the tensile strength and elongation at break of the material; the filler uses mullite powder and analcime powder, which improves the compression resistance of the material. Detailed implementation mode

[0020] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive.

[0021] Example 1

[0022] A foaming material for air-conditioning color tubes includes the following raw materials in parts by weight: 40 parts of nitrile rubber, 35 parts of polyvinyl chloride, 10 parts of chlorinated polyvinyl chloride, 105 parts of filler, 35 parts of foaming agent, 2 parts of cis-butadiene rubber, 8 parts of carbon black, 7 parts of paraffin wax, 70 parts of chlorinated paraffin oil, 2.5 parts of zinc stearate, 1.5 parts of epoxidized soybean oil, 5 parts of iron oxide red, 3.5 parts of accelerator, 0.5 part of zinc oxide, 0.5 part of vulcanizing agent; the filler includes the following components in parts by weight: 50 parts of kaolin, 45 parts of calcium carbonate, 10 parts of talc powder; the foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonyl hydrazide) mixed in a mass ratio of 2:1; the accelerator includes the following components in parts by weight: 2.5 parts of accelerator PZ, 0.5 part of accelerator ZBS, 0.5 part of accelerator DPTT; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed in a mass ratio of 2:1.

[0023] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0024] (1) By weight, take acrylonitrile-butadiene rubber: 40 parts, polyvinyl chloride: 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, foaming agent 35 parts, cis-1,4-polybutadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxidized soybean oil 1.5 parts, iron oxide red 5 parts, zinc oxide 0.5 parts, add them to an internal mixer, and carry out internal mixing at 160 °C for 12 min;

[0025] (2) Add 3.5 parts of accelerator and 0.5 part of vulcanizing agent to the material prepared in step (1), send it to an open mill for open milling for 8 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 50 °C;

[0026] (3) Place the formed material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, with a feeding speed of 2.8 m / min; zone 2 at 120 °C, with a feeding speed of 3.3 m / min; zone 3 at 130 °C, with a feeding speed of 3.9 m / min; zone 4 at 140 °C, with a feeding speed of 4.8 m / min; zone 5 at 150 °C, with a feeding speed of 5.8 m / min; zone 6 at 160 °C, with a feeding speed of 6.8 m / min; zone 7 at 170 °C, with a feeding speed of 8 m / min; zone 8 at 175 °C, with a feeding speed of 9.5 m / min;

[0027] (4) Cool the formed foaming material prepared in step (3) to room temperature, cut it into finished foaming material with a length of 12 m, and then package and store it in the warehouse.

[0028] Example 2

[0029] A foaming material for air-conditioning color tubes, comprising the following raw materials by weight: acrylonitrile-butadiene rubber 35 parts, polyvinyl chloride 32 parts, chlorinated polyvinyl chloride 9 parts, filler 90 parts, foaming agent 28 parts, cis-1,4-polybutadiene rubber 1 part, carbon black 6 parts, paraffin wax 6 parts, chlorinated paraffin oil 60 parts, stearic acid 2 parts, epoxidized soybean oil 1 part, titanium dioxide 4 parts, accelerator 3 parts, zinc oxide 0.3 part, vulcanizing agent 0.3 part; the filler is a mixture of mullite powder and analcime powder mixed according to a mass ratio of 1:2; the foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonylhydrazide) mixed according to a mass ratio of 2:1; the accelerator comprises the following components by weight: accelerator PZ 2 parts, accelerator ZBS 0.5 part, accelerator DPTT 0.5 part; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed according to a mass ratio of 2:1.

[0030] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0031] (1) According to the weight parts, take 35 parts of nitrile rubber, 32 parts of polyvinyl chloride, 9 parts of chlorinated polyvinyl chloride, 90 parts of filler, 28 parts of foaming agent, 1 part of cis-butadiene rubber, 6 parts of carbon black, 6 parts of paraffin wax, 60 parts of chlorinated paraffin oil, 2 parts of stearic acid, 1 part of epoxidized soybean oil, 4 parts of titanium dioxide, and 0.3 parts of zinc oxide, add them to an internal mixer, and carry out internal mixing at 140 °C for 15 min;

[0032] (2) Add 3 parts of accelerator and 0.3 parts of vulcanizing agent to the material prepared in step (1), send it to a two-roll mill for mixing for 6 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 40 °C;

[0033] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, with a feeding speed of 2.8 m / min; zone 2 at 120 °C, with a feeding speed of 3.3 m / min; zone 3 at 130 °C, with a feeding speed of 3.9 m / min; zone 4 at 140 °C, with a feeding speed of 4.8 m / min; zone 5 at 150 °C, with a feeding speed of 5.8 m / min; zone 6 at 160 °C, with a feeding speed of 6.8 m / min; zone 7 at 170 °C, with a feeding speed of 8 m / min; zone 8 at 175 °C, with a feeding speed of 9.5 m / min;

[0034] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 8 m, and then package and store it in a warehouse.

[0035] Example 3

[0036] A foaming material for air-conditioning color tubes, comprising the following raw materials in weight parts: 50 parts of nitrile rubber, 40 parts of polyvinyl chloride, 12 parts of chlorinated polyvinyl chloride, 120 parts of filler, 45 parts of foaming agent, 3 parts of cis-butadiene rubber, 10 parts of carbon black, 9 parts of paraffin wax, 90 parts of chlorinated paraffin oil, 3 parts of 2-(pentaerythritol triisooctoate) adipate, 2 parts of epoxidized soybean oil, 6 parts of iron oxide yellow, 5 parts of accelerator, 0.6 parts of zinc oxide, and 0.6 parts of vulcanizing agent; the filler is a mixture of mullite powder and analcime powder mixed according to a mass ratio of 1:2; the foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonyl hydrazide) mixed according to a mass ratio of 2:1; the accelerator comprises the following components in weight parts: 3.6 parts of accelerator PZ, 0.7 parts of accelerator ZBS, and 0.7 parts of accelerator DPTT; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed according to a mass ratio of 2:1.

[0037] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0038] (1) According to the weight ratio, 50 parts of nitrile rubber, 40 parts of polyvinyl chloride, 12 parts of chlorinated polyvinyl chloride, 120 parts of filler, 45 parts of foaming agent, 3 parts of butadiene rubber, 10 parts of carbon black, 9 parts of paraffin wax, 90 parts of chlorinated paraffin oil, 3 parts of 2-(pentaerythritol triisooctanoate) adipate, 2 parts of epoxy soybean oil, 6 parts of yellow iron oxide, 0.6 parts of zinc oxide, and 0.6 parts of vulcanizing agent were added to an internal mixer and mixed at 170°C for 10 minutes;

[0039] (2) adding 5 parts of accelerator and 0.6 parts of vulcanizing agent to the material prepared in step (1), sending the mixture into an open mill for 10 minutes, cooling it to room temperature, and sending it into an extruder for extrusion molding; the head temperature of the extruder was set at 60°C;

[0040] (3) placing the molding material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 110°C, feeding speed 2.8 m / min; zone 2 120°C, feeding speed 3.3 m / min; zone 3 130°C, feeding speed 3.9 m / min; zone 4 140°C, feeding speed 4.8 m / min; zone 5 150°C, feeding speed 5.8 m / min; zone 6 160°C, feeding speed 6.8 m / min; zone 7 170°C, feeding speed 8 m / min; zone 8 175°C, feeding speed 9.5 m / min;

[0041] (4) The molded foam material prepared in step (3) is cooled to room temperature, cut into finished foam materials with a length of 15 m, and then packaged and stored.

[0042] Comparative Example 1

[0043] A foaming material for air conditioner color tubes comprises the following raw materials in parts by weight: 40 parts of nitrile rubber, 35 parts of polyvinyl chloride, 10 parts of chlorinated polyvinyl chloride, 105 parts of filler, 35 parts of dinitrosopentamethylenetetramine, 2 parts of butadiene rubber, 8 parts of carbon black, 7 parts of paraffin wax, 70 parts of chlorinated paraffin oil, 2.5 parts of zinc stearate, 1.5 parts of epoxidized soybean oil, 5 parts of red iron oxide, 3.5 parts of accelerator, 0.5 part of zinc oxide, and 0.5 part of vulcanizing agent; the filler comprises the following components in parts by weight: 50 parts of clay, 45 parts of calcium carbonate, and 10 parts of talc; the accelerator comprises the following components in parts by weight: 2.5 parts of accelerator PZ, 0.5 parts of accelerator ZBS, and 0.5 parts of accelerator DPTT; and the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin in a mass ratio of 2:1.

[0044] The preparation method of the foam material for air-conditioning color tube is carried out according to the following steps:

[0045] (1) By weight parts, take nitrile rubber: 40 parts, polyvinyl chloride: 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, dinitrosopentamethylenetetramine 35 parts, cis-butadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxidized soybean oil 1.5 parts, iron oxide red 5 parts, zinc oxide 0.5 parts, add them to an internal mixer, and mix at 160 °C for 12 min;

[0046] (2) Add 3.5 parts of accelerator and 0.5 parts of vulcanizing agent to the material prepared in step (1), send it to a two-roll mill for mixing for 8 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 50 °C;

[0047] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, feeding speed 2.8 m / min; zone 2 at 120 °C, feeding speed 3.3 m / min; zone 3 at 130 °C, feeding speed 3.9 m / min; zone 4 at 140 °C, feeding speed 4.8 m / min; zone 5 at 150 °C, feeding speed 5.8 m / min; zone 6 at 160 °C, feeding speed 6.8 m / min; zone 7 at 170 °C, feeding speed 8 m / min; zone 8 at 175 °C, feeding speed 9.5 m / min;

[0048] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 12 m, and then package and store it in the warehouse.

[0049] Comparative Example 2

[0050] A foamed material for air-conditioning color tubes, comprising the following raw materials by weight parts: nitrile rubber 40 parts, polyvinyl chloride 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, 4,4′-sulfonylhydrazide diphenyl ether 35 parts, cis-butadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxidized soybean oil 1.5 parts, iron oxide red 5 parts, accelerator 3.5 parts, zinc oxide 0.5 parts, vulcanizing agent 0.5 parts; the filler comprises the following components by weight parts: kaolin 50 parts, calcium carbonate 45 parts, talc powder 10 parts; the accelerator comprises the following components by weight parts: accelerator PZ 2.5 parts, accelerator ZBS 0.5 parts, accelerator DPTT 0.5 parts; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed in a mass ratio of 2:1.

[0051] The preparation method of the foamed material for air-conditioning color tubes is carried out according to the following steps:

[0052] (1) By weight, take 40 parts of nitrile rubber, 35 parts of polyvinyl chloride, 10 parts of chlorinated polyvinyl chloride, 105 parts of filler, 35 parts of 4,4′-sulfonylhydrazide diphenyl ether, 2 parts of cis-butadiene rubber, 8 parts of carbon black, 7 parts of paraffin wax, 70 parts of chlorinated paraffin oil, 2.5 parts of zinc stearate, 1.5 parts of epoxidized soybean oil, 5 parts of iron oxide red, and 0.5 part of zinc oxide, and add them to an internal mixer. Knead at 160 °C for 12 min;

[0053] (2) Add 3.5 parts of accelerator and 0.5 part of vulcanizing agent to the material prepared in step (1), send it to a two-roll mill for mixing for 8 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 50 °C;

[0054] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, feeding speed 2.8 m / min; zone 2 at 120 °C, feeding speed 3.3 m / min; zone 3 at 130 °C, feeding speed 3.9 m / min; zone 4 at 140 °C, feeding speed 4.8 m / min; zone 5 at 150 °C, feeding speed 5.8 m / min; zone 6 at 160 °C, feeding speed 6.8 m / min; zone 7 at 170 °C, feeding speed 8 m / min; zone 8 at 175 °C, feeding speed 9.5 m / min;

[0055] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 12 m, and then package and store it in a warehouse.

[0056] Comparative Example 3

[0057] A foaming material for air-conditioning color tubes comprises raw materials in the following weight parts: 40 parts of nitrile rubber, 35 parts of polyvinyl chloride, 10 parts of chlorinated polyvinyl chloride, 105 parts of filler, 35 parts of foaming agent, 2 parts of cis-butadiene rubber, 8 parts of carbon black, 7 parts of paraffin wax, 70 parts of chlorinated paraffin oil, 2.5 parts of zinc stearate, 1.5 parts of epoxidized soybean oil, 5 parts of iron oxide red, 3.5 parts of accelerator, 0.5 part of zinc oxide, and 0.5 part of insoluble sulfur IS-60; the filler comprises components in the following weight parts: 50 parts of kaolin, 45 parts of calcium carbonate, and 10 parts of talc powder; the foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-sulfonylhydrazide diphenyl ether mixed in a mass ratio of 2:1; the accelerator comprises components in the following weight parts: 2.5 parts of accelerator PZ, 0.5 part of accelerator ZBS, and 0.5 part of accelerator DPTT.

[0058] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0059] (1) By weight, take nitrile rubber: 40 parts, polyvinyl chloride: 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, blowing agent 35 parts, cis-butadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxy soybean oil 1.5 parts, iron oxide red 5 parts, zinc oxide 0.5 parts, add them to an internal mixer, and knead at 160 °C for 12 min;

[0060] (2) Add 3.5 parts of accelerator and 0.5 part of insoluble sulfur IS-60 to the material prepared in step (1), send it to a two-roll mill for mixing for 8 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 50 °C;

[0061] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, feeding speed 2.8 m / min; zone 2 at 120 °C, feeding speed 3.3 m / min; zone 3 at 130 °C, feeding speed 3.9 m / min; zone 4 at 140 °C, feeding speed 4.8 m / min; zone 5 at 150 °C, feeding speed 5.8 m / min; zone 6 at 160 °C, feeding speed 6.8 m / min; zone 7 at 170 °C, feeding speed 8 m / min; zone 8 at 175 °C, feeding speed 9.5 m / min;

[0062] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 12 m, and then package and store it in a warehouse.

[0063] Comparative Example 4

[0064] A foaming material for air-conditioning color tubes, comprising the following raw materials by weight: nitrile rubber 40 parts, polyvinyl chloride 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, blowing agent 35 parts, cis-butadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxy soybean oil 1.5 parts, iron oxide red 5 parts, accelerator 3.5 parts, zinc oxide 0.5 parts, SP1045 phenolic resin 0.5 parts; the filler comprises the following components by weight: kaolin 50 parts, calcium carbonate 45 parts, talc powder 10 parts; the blowing agent is a mixture of dinitrosopentamethylenetetramine and 4,4′-oxybis(benzenesulfonylhydrazide) mixed in a mass ratio of 2:1; the accelerator comprises the following components by weight: accelerator PZ 2.5 parts, accelerator ZBS 0.5 parts, accelerator DPTT 0.5 parts.

[0065] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0066] (1) By weight parts, take nitrile rubber: 40 parts, polyvinyl chloride: 35 parts, chlorinated polyvinyl chloride 10 parts, filler 105 parts, blowing agent 35 parts, cis-butadiene rubber 2 parts, carbon black 8 parts, paraffin wax 7 parts, chlorinated paraffin oil 70 parts, zinc stearate 2.5 parts, epoxidized soybean oil 1.5 parts, iron oxide red 5 parts, zinc oxide 0.5 parts, and add them to an internal mixer. Knead at 160 °C for 12 min;

[0067] (2) Add 3.5 parts of accelerator and 0.5 part of SP1045 phenolic resin to the material prepared in step (1), send it to an open mill for mixing for 8 min, cool it to room temperature, and then send it to an extruder for extrusion molding; the head temperature of the extruder is set at 50 °C;

[0068] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, feeding speed 2.8 m / min; zone 2 at 120 °C, feeding speed 3.3 m / min; zone 3 at 130 °C, feeding speed 3.9 m / min; zone 4 at 140 °C, feeding speed 4.8 m / min; zone 5 at 150 °C, feeding speed 5.8 m / min; zone 6 at 160 °C, feeding speed 6.8 m / min; zone 7 at 170 °C, feeding speed 8 m / min; zone 8 at 175 °C, feeding speed 9.5 m / min;

[0069] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 12 m, and then package and store it in the warehouse.

[0070] Comparative Example 5

[0071] A foamed material for air-conditioning color tubes, comprising the following raw materials by weight parts: nitrile rubber 35 parts, polyvinyl chloride 32 parts, chlorinated polyvinyl chloride 9 parts, mullite powder 90 parts, blowing agent 28 parts, cis-butadiene rubber 1 part, carbon black 6 parts, paraffin wax 6 parts, chlorinated paraffin oil 60 parts, stearic acid 2 parts, epoxidized soybean oil 1 part, titanium dioxide 4 parts, accelerator 3 parts, zinc oxide 0.3 part, vulcanizing agent 0.3 part; the blowing agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonylhydrazide) in a mass ratio of 2:1; the accelerator comprises the following components by weight parts: accelerator PZ 2 parts, accelerator ZBS 0.5 part, accelerator DPTT 0.5 part; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin in a mass ratio of 2:1.

[0072] The preparation method of the foamed material for air-conditioning color tubes is carried out according to the following steps:

[0073] (1) By weight parts, take 35 parts of nitrile rubber, 32 parts of polyvinyl chloride, 9 parts of chlorinated polyvinyl chloride, 90 parts of mullite powder, 28 parts of foaming agent, 1 part of cis-butadiene rubber, 6 parts of carbon black, 6 parts of paraffin wax, 60 parts of chlorinated paraffin oil, 2 parts of stearic acid, 1 part of epoxidized soybean oil, 4 parts of titanium dioxide, 0.3 parts of zinc oxide, add them to an internal mixer, and mix for 15 min at 140 °C;

[0074] (2) Add 3 parts of accelerator and 0.3 parts of vulcanizing agent to the material prepared in step (1), send it to an open mill for mixing for 6 min, cool it to room temperature, and send it to an extruder for extrusion molding; the head temperature of the extruder is set at 40 °C;

[0075] (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, with a feeding speed of 2.8 m / min; zone 2 at 120 °C, with a feeding speed of 3.3 m / min; zone 3 at 130 °C, with a feeding speed of 3.9 m / min; zone 4 at 140 °C, with a feeding speed of 4.8 m / min; zone 5 at 150 °C, with a feeding speed of 5.8 m / min; zone 6 at 160 °C, with a feeding speed of 6.8 m / min; zone 7 at 170 °C, with a feeding speed of 8 m / min; zone 8 at 175 °C, with a feeding speed of 9.5 m / min;

[0076] (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 8 m, and then package and store it in the warehouse.

[0077] Comparative Example 6

[0078] A foaming material for air-conditioning color tubes, comprising the following raw materials by weight parts: 35 parts of nitrile rubber, 32 parts of polyvinyl chloride, 9 parts of chlorinated polyvinyl chloride, 90 parts of analcime powder, 28 parts of foaming agent, 1 part of cis-butadiene rubber, 6 parts of carbon black, 6 parts of paraffin wax, 60 parts of chlorinated paraffin oil, 2 parts of stearic acid, 1 part of epoxidized soybean oil, 4 parts of titanium dioxide, 3 parts of accelerator, 0.3 parts of zinc oxide, 0.3 parts of vulcanizing agent; the foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonylhydrazide) mixed in a mass ratio of 2:1; the accelerator comprises the following components by weight parts: 2 parts of accelerator PZ, 0.5 parts of accelerator ZBS, 0.5 parts of accelerator DPTT; the vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed in a mass ratio of 2:1.

[0079] The preparation method of the foaming material for air-conditioning color tubes is carried out according to the following steps:

[0080] (1) By weight parts, take 35 parts of nitrile rubber, 32 parts of polyvinyl chloride, 9 parts of chlorinated polyvinyl chloride, 90 parts of analcime powder, 28 parts of foaming agent, 1 part of cis-butadiene rubber, 6 parts of carbon black, 6 parts of paraffin wax, 60 parts of chlorinated paraffin oil, 2 parts of stearic acid, 1 part of epoxidized soybean oil, 4 parts of titanium dioxide, and 0.3 parts of zinc oxide, and add them to a kneader, and knead at 140 °C for 15 min;

[0081] (2) Add 3 parts of accelerator and 0.3 parts of vulcanizing agent to the material prepared in step (1), send it to an open mill for mixing for 6 min, cool it to room temperature, and send it to an extruder for extrusion molding; the head temperature of the extruder is set at 40 °C;

[0082] (3) Place the formed material prepared in step (2) in an oven for continuous vulcanization and foaming; the oven is divided into 8 vulcanization temperature zones: zone 1 at 110 °C, feeding speed 2.8 m / min; zone 2 at 120 °C, feeding speed 3.3 m / min; zone 3 at 130 °C, feeding speed 3.9 m / min; zone 4 at 140 °C, feeding speed 4.8 m / min; zone 5 at 150 °C, feeding speed 5.8 m / min; zone 6 at 160 °C, feeding speed 6.8 m / min; zone 7 at 170 °C, feeding speed 8 m / min; zone 8 at 175 °C, feeding speed 9.5 m / min;

[0083] (4) Cool the formed foamed material prepared in step (3) to room temperature, cut it into finished foamed material with a length of 8 m, and then package and store it in a warehouse.

[0084] According to the method specified in DIN 53479, measure the density of the foamed materials prepared in Example 1, Example 3 and Comparative Examples 1-2. The measurement results are shown in Table 1; each material is measured 3 times repeatedly and the average value is taken. Statistical analysis is carried out using SPSS24.0 software. The results of measurement data are expressed in (mean ± standard deviation), and the Kolmogorov-Smirnov test method is used for data normality test. For data conforming to normal distribution, the t-test is used to compare the mean differences between two groups. Taking P < 0.05 as the difference having statistical significance, the measurement results are shown in Table 1:

[0085] Table 1

[0086]

[0087] Note: * represents P < 0.05 compared with the Example 1 group.

[0088] According to the method specified in DIN 53543, measure the tensile strength of the foamed materials prepared in Example 1, Example 3 and Comparative Examples 3-4, and measure the elongation at break according to the method specified in DIN 53507-B. The measurement results are shown in Table 2:

[0089] Table 2

[0090]

[0091]

[0092] Note: * represents P < 0.05 compared with the group of Example 1.

[0093] The resilience of the foamed materials prepared in Examples 2 - 3 and Comparative Examples 5 - 6 was measured by the method specified in DIN 53512, and the compression set was measured by the method specified in ASTM-D.395-B. The measurement results are shown in Table 3:

[0094] Table 3

[0095]

[0096] Note: * represents P < 0.05 compared with the group of Example 2.

[0097] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A foaming material for air-conditioning color tubes, characterized in that, It includes raw materials in the following parts by weight: 30 - 50 parts of nitrile rubber, 30 - 40 parts of polyvinyl chloride, 8 - 12 parts of chlorinated polyvinyl chloride, 85 - 125 parts of filler, 25 - 45 parts of foaming agent, 1 - 3 parts of cis-butadiene rubber, 6 - 10 parts of carbon black, 5 - 9 parts of paraffin wax, 50 - 90 parts of chlorinated paraffin oil, 2 - 3 parts of lubricant, 1 - 2 parts of epoxidized soybean oil, 4 - 6 parts of pigment, 2 - 6 parts of accelerator, 0.2 - 0.7 parts of zinc oxide, and 0.2 - 0.7 parts of vulcanizing agent.

2. The foaming material for air-conditioning color tubes according to claim 1, characterized in that, The filler includes components in the following parts by weight: 50 parts of kaolin, 45 parts of calcium carbonate, and 10 parts of talc powder.

3. The foaming material for air-conditioning color picture tubes according to claim 1, characterized in that, The filler is a mixture of mullite powder and analcime powder mixed in a mass ratio of 1:

2.

4. The foaming material for air-conditioning color picture tubes according to claim 1, characterized in that, The foaming agent is a mixture of dinitropentamethylenetetramine and 4,4′-oxybis(benzenesulfonylhydrazide) mixed in a mass ratio of 2:

1.

5. The foaming material for air-conditioning color picture tubes according to claim 1, characterized in that The lubricant is one or more of stearic acid, zinc stearate, and 2-(tris(2-ethylhexanoyl)pentaerythritol) adipate.

6. The foaming material for air-conditioning color picture tubes according to claim 1, characterized in that The pigment is one or more of titanium dioxide, iron oxide red, iron oxide yellow, iron oxide black, pigment yellow 13, and pigment orange 13.

7. The foaming material for air-conditioning color picture tubes according to claim 1, wherein, The accelerator includes components in the following parts by weight: 1.5 - 4.5 parts of accelerator PZ, 0.3 - 0.7 parts of accelerator ZBS, and 0.3 - 0.7 parts of accelerator DPTT.

8. The foaming material for air-conditioning color tubes according to claim 1, characterized in that, The vulcanizing agent is a mixture of insoluble sulfur IS-60 and SP1045 phenolic resin mixed in a mass ratio of 2:

1.

9. The preparation method of the foaming material for the air-conditioning color picture tube according to claim 1, characterized in that, It is carried out according to the following steps: (1) By weight, take 30 - 50 parts of nitrile rubber, 30 - 40 parts of polyvinyl chloride, 8 - 12 parts of chlorinated polyvinyl chloride, 85 - 125 parts of filler, 25 - 45 parts of foaming agent, 1 - 3 parts of cis-butadiene rubber, 6 - 10 parts of carbon black, 5 - 9 parts of paraffin wax, 50 - 90 parts of chlorinated paraffin oil, 2 - 3 parts of lubricant, 1 - 2 parts of epoxidized soybean oil, 4 - 6 parts of pigment, and 0.2 - 0.7 parts of zinc oxide, add them to an internal mixer, and mix for 10 - 15 min at 130 - 180 °C; (2) Add 2 - 6 parts of accelerator and 0.2 - 0.7 parts of vulcanizing agent to the material prepared in step (1), send it to an open mill for mixing for 5 - 10 min, cool it to room temperature, and then send it to an extruder for extrusion molding; (3) Place the molded material prepared in step (2) in an oven for continuous vulcanization and foaming; (4) Cool the molded foamed material prepared in step (3) to room temperature, cut it into finished foamed materials with a length of 3 - 20 m, and then package and store them in a warehouse.

10. The preparation method of the foaming material for air-conditioning color tubes according to claim 9, characterized in that, The head temperature of the extruder described in step (2) is set at 40 - 60 °C; the oven described in step (3) is divided into 8 vulcanization temperature zones: Zone 1 at 105 - 115 °C, with a material passing speed of 2.5 - 3.0 m / min; Zone 2 at 115 - 125 °C, with a material passing speed of 3.2 - 3.5 m / min; Zone 3 at 125 - 135 °C, with a material passing speed of 3.8 - 4.0 m / min; Zone 4 at 135 - 145 °C, with a material passing speed of 4.5 - 5.0 m / min; Zone 5 at 145 - 155 °C, with a material passing speed of 5.5 - 6.0 m / min; Zone 6 at 155 - 165 °C, with a material passing speed of 6.5 - 7.0 m / min; Zone 7 at 165 - 175 °C, with a material passing speed of 7.5 - 8.5 m / min; Zone 8 at 170 - 180 °C, with a material passing speed of 9.0 - 10.0 m / min.

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