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Polypropylene plastic mold for concrete member and preparation method of polypropylene plastic mold

A polypropylene plastic and concrete technology, applied in the field of concrete components, can solve the problems of poor toughness and rigidity, poor wear resistance, deformation, and affecting the stability of concrete components, so as to improve heat resistance, not easily damaged and deformed, and improve toughness and Rigid effect

Pending Publication Date: 2022-03-25
北京玄泽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing molds for polypropylene components have poor toughness, rigidity, and wear resistance, and will be deformed after repeated use, which will affect the stability of concrete component production

Method used

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  • Polypropylene plastic mold for concrete member and preparation method of polypropylene plastic mold
  • Polypropylene plastic mold for concrete member and preparation method of polypropylene plastic mold
  • Polypropylene plastic mold for concrete member and preparation method of polypropylene plastic mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 80 parts of PP, 5 parts of mass compatibilizer PP-g-MAH, 15 parts of POE-g-MAH into a blast drying oven (set to 60 ° C) to dry for 24 hours, then add 10 parts of 15 μm in diameter, Basalt fibers with a length of 18 mm, as well as an appropriate amount of nucleating agent and antioxidant, were added to a twin-screw extruder and mixed uniformly for melt blending and extrusion experiments.

[0031] The temperature of the five zones of the twin-screw extruder is 190°C, 200°C, 210°C, 180°C, and 160°C, respectively, the head temperature is 150°C, and the screw speed is 120 rpm. The extruded strips are water-cooled, blown dry, sent to the pelletizer and adjusted to 200r / min for pelletizing, and pellets are prepared for use.

[0032] After melt blending and extrusion granulation, the obtained pellets were dried in a drying oven at a constant temperature of 60° C. for 12 hours, and then an injection molding experiment was performed.

Embodiment 2

[0034] The implementation steps are the same as in Example 1, but the addition amount of each component is different, 75 parts of PP, 10 parts of PP-g-MAH, 10 parts of POE-g-MAH, 15 parts of basalt fibers with a diameter of 15 μm and a length of 18 mm, and an appropriate amount. nucleating agent and antioxidant.

Embodiment 3

[0036] The implementation steps are the same as in Example 1, but the addition amount of each component is different, 60 parts of PP, 15 parts of PP-g-MAH, 15 parts of POE-g-MAH, 20 parts of basalt fibers with a diameter of 15 μm and a length of 18 mm, and an appropriate amount. nucleating agent and antioxidant.

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Abstract

The invention provides a polypropylene plastic mold for a concrete member. The polypropylene plastic mold is prepared from the following raw materials in parts by weight: 50 to 100 parts of polypropylene injection molding grade material, 5 to 30 parts of compatilizer, 10 to 30 parts of flexibilizer, 5 to 15 parts of beta-crystal form nucleating agent, 20 to 40 parts of antioxidant and 10 to 40 parts of basalt fiber, 5-10 parts of a diatomite composite oil-based modified material is also added; the invention relates to a diatomite composite oil-based modified material, wherein a modified solution comprises hexamethylsiloxane, an acetone solvent, glucuronolactone and polyethylene glycol. The toughening agent and the fiber are added into the polypropylene, so that the toughness and rigidity of a polypropylene mold can be improved, the impact strength and the tensile strength are higher, the basalt fiber has the effect of preventing thermal degradation, the heat resistance of the mold is improved, the mold is not easy to damage and deform, and the mold is more durable, and a certain amount of auxiliaries are selected in the formula components, so that the production cost is reduced. The stability of the polypropylene resin can be improved, and a certain effect on demolding of a mold is also achieved.

Description

technical field [0001] The invention relates to the technical field of concrete components, in particular to a polypropylene plastic mold for concrete components and a preparation method thereof. Background technique [0002] With the development of prefabricated concrete technology, more and more construction industries begin to use prefabricated concrete to complete engineering projects. The use of concrete prefabricated components has the advantages of convenient construction, uniform appearance and size, beautiful appearance and safety. The mold is the basis for determining the shape of the prefabricated component. Insufficient rigidity of the mold and improper material will reduce the quality of the component. Existing molds for polypropylene components have poor toughness, rigidity and wear resistance, and will deform to a certain extent after being recycled for many times, which affects the stability of the production of concrete components. [0003] Basalt fiber is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/10C08K9/04C08K9/06C08K9/02C08K7/26
CPCC08L23/12C08K2201/011C08L51/06C08K7/10C08K9/04C08K9/06C08K9/08C08K9/02C08K7/26
Inventor 刘丽丽孙丽何志娟
Owner 北京玄泽新材料科技有限公司
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