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LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate

A technology of LFT-D and building formwork, which is applied in the field of LFT-D molding technology of calcium carbonate-filled building formwork, can solve the problems of exposed fiber impact performance and other problems, achieve increased interface bonding force, reduce manufacturing cost, and improve impact resistance The effect of the characteristic

Active Publication Date: 2014-09-24
福建易安特新型建材有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an LFT-D forming method for building formwork, which uses ultra-fine ground calcium carbonate as the inorganic filler to construct an inorganic filler / glass fiber / PP composite material system to solve the problem of glass fiber / PP composite Problems with fiber exposure and impact performance of the material system

Method used

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  • LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate
  • LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate
  • LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate

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Embodiment Construction

[0014] Such as figure 1 Shown, the LFT-D molding method of building formwork of the present invention comprises:

[0015] Step 10. Mix 5-20 parts of modifier calcium carbonate and 50-65 parts of modified PP masterbatch by mechanical stirring for 30-60 minutes to obtain a uniform mixture of heavy calcium carbonate and PP ; The mass component ratio of the mixture is: calcium carbonate is 7-28%, PP is 72-97%.

[0016] Step 20, n; melt and plasticize the mixture through a first-stage twin-screw extruder, the speed of the first-stage twin-screw extruder is 160-210rpm / min, and the first-stage twin-screw extruder is heated in eight stages , the temperature of the first three stages is 190-220°C, the temperature of the last four stages is 210-230°C, and the temperature of the last machine head is 210-240°C;

[0017] Step 30. Put 30 parts of modified glass fiber and the mixture melted and plasticized by the first-stage screw extruder into the second-stage screw extruder for melting a...

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Abstract

The invention provides an LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of a building template. The LFT-D forming method comprises the following steps of: uniformly stirring 5-20 parts by weight of modifying agent calcium carbonate and 50-65 parts by weight of modified PP (Propene Polymer) master batch to obtain a uniformly mixed mixture; fusing and plasticizing the mixture through a first-order screw extruder; feeding 30 parts by weight of modified glass fibers and the mixture which is fused and plasticized through the first-order screw extruder into a second-order screw extruder together, and extruding after fusing and mixing; clamping the mixture extruded through the second-order screw extruder into a mould-pressing mould by a mechanical arm, and assembling the mould-pressing mould and maintaining pressure to obtain a product. The LFT-D forming method provided by the invention takes superfine heavy calcium carbonate as an inorganic filler, can be used for constructing the inorganic filler / glass fiber / PP composite material system and solves the problems on the aspects of fiber exposure and the like of a glass fiber / PP composite material system.

Description

technical field [0001] The invention relates to an LFT-D forming method of building formwork. Background technique [0002] The proportion of existing glass fiber reinforced PP composite materials is mostly modified PP and glass fiber, adding some combustion enhancers or heat stabilizers. Unstable surface quality such as exposed fibers. At the same time, with the increase in the number of times of use of the building formwork using glass fiber reinforced modified PP composite materials, the shrinkage and deformation of the later products will become larger, resulting in the large joints after the formwork assembly of different sizes is assembled, which will deteriorate the construction quality, thereby reducing This shows that in order to further improve the surface quality of the formwork and increase the number of times the formwork is used, it is an effective choice to fill the modified glass fiber reinforced PP composite material with inorganic fillers. Contents of th...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/04C08K7/14C08K3/26B29C47/92B29C48/92
CPCB29C47/369B29C2947/92942B29C47/92B29C48/92C08K3/26C08K7/14C08K2003/265C08K2201/011C08L23/12B29C48/39B29C48/40B29C2948/92561B29C2948/9259B29C2948/92704B29C2948/92942
Inventor 王加志赵珍贵杨玲娜程国龙
Owner 福建易安特新型建材有限公司
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