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Forming method of polyvinyl chloride physical foam board

A polyvinyl chloride and physical foaming technology, applied in the field of plastic sheet manufacturing, can solve the problems of unstable product quality and difficulty in foaming, and achieve the effects of easy control of foaming ratio, low production cost, and fine and uniform cells.

Active Publication Date: 2019-03-26
SHANDONG TONGJIA MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems and overcome the deficiencies of the prior art, the present invention provides a foaming foam that is easy to operate, low in labor intensity, low in production cost, does not decompose during the foaming process, does not paste, and has stable product quality and fine and uniform cells. , The molding method of PVC physical foam board with excellent thermal insulation performance can effectively solve the problems of raw material paste, decomposition, difficult foaming and unstable product quality

Method used

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  • Forming method of polyvinyl chloride physical foam board
  • Forming method of polyvinyl chloride physical foam board
  • Forming method of polyvinyl chloride physical foam board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Add 225 kg of polyvinyl chloride, 245 kg of polystyrene, 5 kg of copolymer of styrene and caprolactone, 25 kg of lead salt stabilizer to mixer 1 and mix evenly, then transfer the mixture to granulation Carry out granulation in machine 2;

[0031] 2. Put the material granules together with 2.5 kg of talcum powder, 1.5 kg of color masterbatch and 15 kg of hexabromocyclododecane flame retardant into the mixer 3 for mixing, and the mixture is automatically sent to the first stage through the feeder 4 Extruder 6 hopper 5;

[0032] 3. The mixed material in the hopper 5 is uniformly heated, melted and plasticized by the high-pressure screw in the primary extruder 6 through nine heating zones. The third zone is 180°C, the fourth zone is 180°C, the fifth zone is 170°C, the sixth zone is 170°C, the seventh zone is 170°C, the eighth zone is 170°C, and the ninth zone is 160°C. Inject 25 kg of environmentally friendly freon to fully mix it with the molten material, filter and r...

Embodiment 2

[0036] 1. Add 325 kg of polyvinyl chloride, 145 kg of polystyrene, copolymer of styrene and caprolactone, copolymer of benzene and methyl methacrylate, graft copolymer and embedded A total of 5 kg of the mixture of segment copolymers, a total of 25 kg of the mixture of lead salt stabilizer, organoolefin stabilizer, toughening agent ACR and antioxidant 1010 are mixed uniformly and then the mixture is transferred to the granulator 2 for making grain;

[0037] 2. Add a total of 20 kg of material granules, talcum powder, calcium carbonate, zinc stearate, 10 kg of color masterbatch and 50 kg of hydroxide flame retardant into the mixer 3 and mix them. The feeder 4 is automatically sent into the primary extruder 6 hopper 5;

[0038] 3. The mixed material in the hopper 5 is uniformly heated, melted and plasticized by the high-pressure screw in the primary extruder 6 through nine heating zones. The third zone is 180°C, the fourth zone is 180°C, the fifth zone is 170°C, the sixth zone...

Embodiment 3

[0042] 1. Add 275 kg of polyvinyl chloride, 195 kg of polystyrene, 5 kg of graft copolymer and block copolymer mixture, 25 kg of lead salt stabilizer and organic vinyl stabilizer mixture in mixer 1 and mix After being uniform, the mixture is transferred to the granulator 2 for granulation;

[0043] 2. Add 10 kg of material granules together with the mixture of calcium carbonate and zinc stearate, 5 kg of color masterbatch and 30 kg of hexabromocyclododecane flame retardant into the mixer 3 and mix them. The machine 4 is automatically sent into the first-level extruder 6 hopper 5;

[0044] 3. The mixed material in the hopper 5 is uniformly heated, melted and plasticized by the high-pressure screw in the primary extruder 6 through nine heating zones. The third zone is 180°C, the fourth zone is 180°C, the fifth zone is 170°C, the sixth zone is 170°C, the seventh zone is 170°C, the eighth zone is 170°C, and the ninth zone is 160°C. Inject a total of 75 kg of carbon dioxide and b...

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Abstract

The invention discloses a forming method for a polyvinyl chloride physical foam board. The forming method comprises the steps of granulation, first level extrusion, second level extrusion, pressure relief and foaming, cooling forming, first level traction, second level traction and cutting and is characterized in that a compatibilizer, a compound stabilizer, a nucleating agent, color masterbatch, a fire retardant and a foaming agent are added into polyvinyl chloride and polystyrene which serve as raw materials, and extrusion forming is achieved through a physical foaming method. The forming method has the beneficial effects that the physical foaming method is adopted for the polyvinyl chloride foam board, the production cycle is short, the production cost is low, and the product quality is stable; the compound stabilizer and the foaming agent are adopted, foam holes are fine, close and uniform, and the thermal insulation performance is excellent; the polystyrene is added into the polyvinyl chloride raw materials, so that the effect that decomposition and thickening do not occur to the raw materials during foaming is ensured; and the compatibilizer is adopted, so that the polar polyvinyl chloride and the nonpolar polystyrene are compatible very well, and the foaming ratio is easy to control.

Description

technical field [0001] The invention belongs to the technical field of plastic board production and manufacturing, and more specifically relates to a molding method of a polyvinyl chloride physically foamed board. Background technique [0002] In recent years, the foam plastic industry at home and abroad has developed rapidly, and its application has become wider and wider. Especially in packaging, construction and transportation industries, foam plastic has occupied an irreplaceable position. With the continuous development of science and technology, new Various types of foam plastics and new molding methods are constantly being improved. [0003] At present, domestic foamed plastic boards are mainly EPE foamed boards, such as the patent number: 201410385599.5 "EPE continuous physical foamed board production process" disclosed in a kind of EPE continuous physical foamed board production process can significantly improve EPE The quality of the finished product, but the EPE ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/49B29C48/92B29L7/00B29K27/06B29K25/00
CPCB29C48/0022B29C48/07B29C48/49B29C48/92B29C2948/92647B29C2948/92704B29C2948/92876B29C2948/92904B29C2948/92942B29K2025/00B29K2027/06B29L2007/002
Inventor 张建群李勇孟凡敏
Owner SHANDONG TONGJIA MACHINERY
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