Rigid polyvinyl chloride pipe fitting filled with superfine activated calcium carbonate and preparation method thereof

A technology of activated calcium carbonate and hard polyvinyl chloride, which is applied in the field of polyvinyl chloride materials, can solve the instability of formula components and the plasticization of production equipment materials, reduce the mechanical properties of hard polyvinyl chloride pipe fittings, and affect the plasticization To avoid problems such as material stability and fluidity, to avoid product under-injection, increase apparent density, and good fluidity

Pending Publication Date: 2021-08-06
广西雄塑科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary light calcium carbonate has a high oil absorption value and a large change in the index range, which affects the dosage of other additive components in the formula. It affects the plasticization of the materials used in the production equipment, affects the stability and fluidity of the plasticized material, further makes the product easy to produce color deviation, cold spots, black lines and other phenomena, and also reduces the rigid polyvinyl chloride ( Mechanical properties of PVC-U) pipe fittings

Method used

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  • Rigid polyvinyl chloride pipe fitting filled with superfine activated calcium carbonate and preparation method thereof
  • Rigid polyvinyl chloride pipe fitting filled with superfine activated calcium carbonate and preparation method thereof
  • Rigid polyvinyl chloride pipe fitting filled with superfine activated calcium carbonate and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of a rigid polyvinyl chloride pipe fitting filled with ultrafine active calcium carbonate, comprising the following steps:

[0043] (1) Weighing: Weigh the raw materials that make up the hard polyvinyl chloride pipe fittings according to the ratio, among which, the raw material ratio of the hard polyvinyl chloride pipe fittings is: 270 kg of polyvinyl chloride resin powder, 21 kg of ultrafine activated calcium carbonate 15 kg of calcium zinc stabilizer, 10.5 kg of acrylate anti-impact agent, 0.6 kg of lubricant, 3 kg of processing flow agent, 9 kg of titanium dioxide;

[0044] (2) Primary thermal mixing: Put the raw materials that make up the rigid polyvinyl chloride pipe fittings into the mixing equipment for thermal mixing. The temperature of the primary thermal mixing is 115°C, the rotational speed is 1350r / min, and the time is 10min;

[0045] (3) Secondary thermal mixing: Immediately after the first thermal mixing, perform secondary thermal mixi...

Embodiment 2

[0062] A preparation method of a rigid polyvinyl chloride pipe fitting filled with ultrafine active calcium carbonate, comprising the following steps:

[0063] (1) Weighing: Weigh the raw materials that make up the rigid polyvinyl chloride pipe fittings according to the ratio. Among them, the ratio of the raw materials that make up the rigid polyvinyl chloride pipe fittings is: 330 kg of polyvinyl chloride resin powder, 30 kg of ultrafine activated calcium carbonate 16.5 kg of calcium zinc stabilizer, 12 kg of acrylate impact modifier, 0.9 kg of lubricant, 4.5 kg of processing flow agent, 12 kg of titanium dioxide;

[0064] (2) Primary thermal mixing: Put the raw materials that make up the rigid polyvinyl chloride pipe fittings into the mixing equipment for thermal mixing. The temperature of the primary thermal mixing is 120°C, the rotational speed is 1450r / min, and the time is 15 minutes;

[0065] (3) Secondary thermal mixing: Immediately after the first thermal mixing, perfo...

Embodiment 3

[0082] A preparation method of a rigid polyvinyl chloride pipe fitting filled with ultrafine active calcium carbonate, comprising the following steps:

[0083] (1) Weighing: Weigh the raw materials that make up the rigid polyvinyl chloride pipe fittings according to the ratio. Among them, the ratio of the raw materials that make up the rigid polyvinyl chloride pipe fittings is: 300 kg of polyvinyl chloride resin powder, 24 kg of ultrafine activated calcium carbonate 15.6 kg of calcium zinc stabilizer, 11.1 kg of acrylate impact modifier, 0.75 kg of lubricant, 3.6 kg of processing flow agent, 10.5 kg of titanium dioxide;

[0084] (2) One-time thermal mixing: Put the raw materials that make up the rigid polyvinyl chloride pipe fittings into the mixing equipment for thermal mixing. The temperature of the primary thermal mixing is 118°C, the speed is 1400r / min, and the time is 13min;

[0085] (3) Secondary thermal mixing: Immediately perform secondary thermal mixing after the prim...

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Abstract

The invention provides a rigid polyvinyl chloride pipe fitting filled with the superfine active calcium carbonate and a preparation method thereof, the superfine active calcium carbonate is used for replacing common light calcium carbonate to serve as filler, the dosage of other auxiliary components is reduced under the condition that the filling parts are kept unchanged, the product quality is improved, and the formula cost is reduced. The mixture subjected to hot mixing needs to be slowly stirred for several minutes in the hot mixing equipment from high speed to low speed, and then is discharged into the cold mixing equipment for cold mixing, so that the phenomenon of insufficient injection in the production process of the product can be effectively avoided; mixed powder is firstly subjected to melt extrusion through an extruder and then is fed into an injection molding machine for injection molding production, so that cold spots of products can be reduced; the temperature of the extruding machine barrel of granulation equipment is controlled to be 155-165 DEG C, and the temperature of a confluence core area is 4-6 DEG C lower than the temperatures of the first area, the second area, the third area and the mouth mold area of the machine barrel all the time, so that black stripes of a product can be reduced; and the product produced by additionally arranging the drying and dehumidifying steps is high in surface quality and free of bubbles.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride materials, in particular to a rigid polyvinyl chloride pipe fitting filled with ultrafine active calcium carbonate and a preparation method thereof. Background technique [0002] At present, there are many specifications and models of injection-molded rigid polyvinyl chloride (PVC-U) pipe fittings used in building materials. Therefore, upstream production enterprises must undertake the production of various types and specifications of products. Under the current automatic production scale of many hard polyvinyl chloride (PVC-U) pipe fittings manufacturers, the centralized feeding system adopted may have to meet hundreds of different specifications of hard polyvinyl chloride on the basis of a formula system. Vinyl (PVC-U) pipe fittings products. [0003] Rigid polyvinyl chloride (PVC-U) pipe fittings are different from rigid polyvinyl chloride (PVC-U) pipe products. Rigid polyvinyl chlo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L33/04C08K3/26C08K3/22
CPCC08L27/06C08K2003/265C08K2003/2241C08L2203/18C08L33/04C08K3/26C08K3/22
Inventor 李慧娇
Owner 广西雄塑科技发展有限公司
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