A kind of micro-diameter thermoplastic micro-airbag polyurethane elastomer material and preparation method thereof

Abstract

The invention relates to a thermoplastic micro-airbag polyurethane elastomer material with microparticle size and a preparation method thereof. The polyurethane elastomer material includes the following components in weight percentage: supporting skeleton polymer material 1-97%, pressure-resistant and slow-recovery Elastic polymer material 1-97%, nucleating agent 0.01~0.5%, blowing agent 0.1~10%; it is made by the following method: (1) polymer raw material and nucleating agent are fed from the front end of twin-screw extruder The feeding port is fed, and the foaming agent is fed from the feeding port in the middle section, so that all raw materials are hot-melted and mixed fully, and then enter the static mixer for further homogenization, and then are pressure-controlled and quantitatively transported by the melt pump; (2) The hot melt sent out by the melt pump enters the underwater pelletizing chamber through the die head to be pelletized, and is taken out by the process water for separation, and the obtained pellets are screened and dried to obtain the target product. Compared with the prior art, the product of the present invention has an intertwined network airway interpenetrating structure formed by a suitable micro-airbag structure and moderate open cells, and the particle size can be effectively controlled at about 0.5-2mm.

Description

technical field

[0001] The invention relates to the field of polymer material preparation, in particular to a thermoplastic micro-airbag polymer elastomer material and a preparation method thereof. Background technique

[0002] Thermoplastic polymer elastic materials are widely used in the manufacture of production and living facilities, equipment, tools and consumables. With the development of society to meet the requirements of environmental protection, energy saving and consumption reduction, the demand for lightweight materials has become more and more urgent. Thermoplastic polymer elastic materials have also begun a large number of lightweight experiments and verifications and continued to promote their applications. For example, polypropylene PP foam, polyethylene PE foam, polystyrene PS foam, polyester PET foam, polyamide PA foam and polyurethane TPU foam, etc. At present, the common process routes for the expansion of thermoplastic polymer elastomers include: expans...

Examples

Embodiment 1

[0071] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0072] Among them, molecular weight M w In 150K~300K (here K represents the unit thousand) polyether thermoplastic polyurethane, the addition ratio is 75% (weight percentage, the same below), the molecular weight M w For polyether thermoplastic polyurethane at 50K~100K, the addition ratio is 20%, and the foaming agent is CO 2 , the addition amount is 4.5%, and the nucleating agent is calcium carbonate, and the addition amount is 0.5%. Twin-screw extruder length-to-diameter ratio L / D=40, screw heating temperature 160-220°C, static mixer temperature 140-180°C, melt pump inlet pressure 100-150bar, process water pressure 25bar or so, control the release pressure The pressure difference (that is, the pressure difference between the high-pressure hot mel...

Embodiment 2

[0076] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0077] Among them, molecular weight M w Polyether thermoplastic polyurethane at 300K~500K (K here represents the unit thousand), the addition ratio is 60% (weight percentage, the same below), the molecular weight M w In 150K~250K polyether thermoplastic polyurethane, the addition ratio is 35%, and the foaming agent is N 2 , the addition amount is 4.95%, and the nucleating agent is carbon black, and the addition amount is 0.05%. Twin-screw extruder length-to-diameter ratio L / D=56, screw heating temperature 180-240°C, static mixer temperature 150-190°C, melt pump inlet pressure 120-180bar, process water pressure 40bar or so, control the release pressure The pressure difference (that is, the pressure difference between the high-pressure hot melt at th...

Embodiment 3

[0080] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0081] Among them, molecular weight M w Polyether-type thermoplastic polyurethane at 80K~120K (K here represents the unit thousand), the addition ratio is 50% (weight percentage, the same below), the molecular weight M w In 20K~50K polyether thermoplastic polyurethane, the addition ratio is 45%, and the foaming agent is N 2 , the addition amount is 4.8%, and the nucleating agent is a mixture of talcum powder and modified calcium carbonate in a mass ratio of 1:1, and the addition amount is 0.2%. Twin-screw extruder length-to-diameter ratio L / D=48, screw heating temperature 160-220°C, static mixer temperature 130-170°C, melt pump inlet pressure 100-150bar, process water pressure 6bar or so, control pressure release The pressure difference (that is, t...

technical field

[0001] The invention relates to the field of polymer material preparation, in particular to a thermoplastic micro-airbag polymer elastomer material and a preparation method thereof. Background technique

[0002] Thermoplastic polymer elastic materials are widely used in the manufacture of production and living facilities, equipment, tools and consumables. With the development of society to meet the requirements of environmental protection, energy saving and consumption reduction, the demand for lightweight materials has become more and more urgent. Thermoplastic polymer elastic materials have also begun a large number of lightweight experiments and verifications and continued to promote their applications. For example, polypropylene PP foam, polyethylene PE foam, polystyrene PS foam, polyester PET foam, polyamide PA foam and polyurethane TPU foam, etc. At present, the common process routes for the expansion of thermoplastic polymer elastomers include: expans...

Examples

Embodiment 1

[0071] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0072] Among them, molecular weight M w In 150K~300K (here K represents the unit thousand) polyether thermoplastic polyurethane, the addition ratio is 75% (weight percentage, the same below), the molecular weight M w For polyether thermoplastic polyurethane at 50K~100K, the addition ratio is 20%, and the foaming agent is CO 2 , the addition amount is 4.5%, and the nucleating agent is calcium carbonate, and the addition amount is 0.5%. Twin-screw extruder length-to-diameter ratio L / D=40, screw heating temperature 160-220°C, static mixer temperature 140-180°C, melt pump inlet pressure 100-150bar, process water pressure 25bar or so, control the release pressure The pressure difference (that is, the pressure difference between the high-pressure hot mel...

Embodiment 2

[0076] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0077] Among them, molecular weight M w Polyether thermoplastic polyurethane at 300K~500K (K here represents the unit thousand), the addition ratio is 60% (weight percentage, the same below), the molecular weight M w In 150K~250K polyether thermoplastic polyurethane, the addition ratio is 35%, and the foaming agent is N 2 , the addition amount is 4.95%, and the nucleating agent is carbon black, and the addition amount is 0.05%. Twin-screw extruder length-to-diameter ratio L / D=56, screw heating temperature 180-240°C, static mixer temperature 150-190°C, melt pump inlet pressure 120-180bar, process water pressure 40bar or so, control the release pressure The pressure difference (that is, the pressure difference between the high-pressure hot melt at th...

Embodiment 3

[0080] According to the above as figure 1 The technical process prepares the thermoplastic micro-airbag polymer elastomer material of the present invention according to the following raw material formula and process conditions:

[0081] Among them, molecular weight M w Polyether-type thermoplastic polyurethane at 80K~120K (K here represents the unit thousand), the addition ratio is 50% (weight percentage, the same below), the molecular weight M w In 20K~50K polyether thermoplastic polyurethane, the addition ratio is 45%, and the foaming agent is N 2 , the addition amount is 4.8%, and the nucleating agent is a mixture of talcum powder and modified calcium carbonate in a mass ratio of 1:1, and the addition amount is 0.2%. Twin-screw extruder length-to-diameter ratio L / D=48, screw heating temperature 160-220°C, static mixer temperature 130-170°C, melt pump inlet pressure 100-150bar, process water pressure 6bar or so, control pressure release The pressure difference (that is, t...

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