Preparation method of PP/SEBS suitable for rapid molding

A fast, composite material technology, applied in the direction of additive processing, etc., to achieve the effect of low hardness, improved weather resistance, and simple process

A fast, composite material technology, applied in the direction of additive processing, etc., to achieve the effect of low hardness, improved weather resistance, and simple process

CN107964205AInactive Publication Date: 2018-04-27HEILONGJIANG XINDA ENTERPRISE GRP
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Be applicable to the preparation method of the PP / SEBS composite material of rapid prototyping, adopt following steps:

[0028] (1) 27 parts (weight ratio, the same below) of polypropylene T30S, 35 parts of thermoplastic elastomer SEBS YH503, 35 parts of #70 white oil, 2 parts of antioxidant 1024, and 1 part of brominated styrene.

[0029] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 3-10 minutes to obtain a premix;

[0030] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 175°C, 178°C, 180°C, 185°C, 190°C, 200°C ℃, 205℃, die head temperature 210℃, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10-15r / min.

[0031] The obtained material has a Shore hardness (A) of 75, a tensile strength at break of 6.8 MPa, and an ultimate elongation of 300%, and has good rapid prototyping fluency an...

Embodiment 2

[0033] Be applicable to the preparation method of the modified polylactic acid composite material of rapid prototyping, adopt following steps:

[0034] (1) 30 parts (weight ratio, the same below) of polypropylene T30S, 25 parts of thermoplastic elastomer SEBS YH503, 40 parts of #100 white oil, 3 parts of antioxidant DSTP, 2 parts of decabromodiphenyl ether.

[0035] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 3-10 minutes to obtain a premix;

[0036] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 175°C, 178°C, 180°C, 185°C, 190°C, 200°C ℃, 205℃, die head temperature 210℃, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10-15r / min.

[0037] The obtained material has a Shore hardness (A) of 45, a tensile strength at break of 5.6 MPa, and an ultimate elongation of 300%, and has good rapid pr...

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Abstract

The invention relates to a PP / SEBS composite material suitable for rapid molding, and a preparation method thereof. The PP / SEBS composite material is prepared from, by mass, 25-40 parts of polypropylene, 10-30 parts of thermoplastic elastomer SEBS, 10-40 parts of mineral oil, 0-2 parts of an antioxidant and 0-2 parts of a fire retardant. Above raw materials are mixed by a high-speed mixer, and theobtained mixture undergoes extrusion wire-drawing by a twin-screw extruder. Compared with materials in the prior art, the material prepared in the invention has the characteristics of low hardness, improved resistance to weather and heat, excellent printing smoothness and excellent interlayer cohesiveness.

Description

technical field [0001] The invention belongs to the field of polymer materials and is suitable for rapid prototyping materials, in particular to a PP / SEBS composite material suitable for rapid prototyping and a preparation method thereof. Background technique [0002] Rapid prototyping technology, that is, a kind of rapid prototyping technology, is a technology based on digital model files, using bondable materials such as metal or plastic, and constructing objects by slicing and layer-by-layer printing. It has been widely developed in the fields of mold design, industrial machinery parts manufacturing, automobiles, aviation, medicine and medicine. Rapid prototyping technologies mainly include stereolithography, laser sintering, fusion lamination, etc. Among them, fusion lamination printing (FDM) is an extremely important one, and its application range is extremely wide. [0003] The main principle of Fused Deposition Printing Technology (FDM) is to heat the thermoplastic m...

Claims

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Application Information

Patent Timeline
27 Apr 2018
Publication
CN107964205A
IPC
C08L53/02; C08L91/06; C08L91/00; C08L23/12; C08K5/03; C08K5/06; B33Y70/00; B29C47/92; B29C48/92
CPC
C08L53/025; B29C48/92; B29C2948/9259; B29C2948/92704; B33Y70/00; C08L91/06; C08L2201/08; C08L2205/03
Inventors
周利波; 刘刚