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PVC(Polyvinyl chloride) foam core material and production process thereof

A foam core material and production process technology, applied in the field of foam materials, can solve the problems of product quality to be improved and low foam yield, and achieve the effects of high yield, low density, and simple production process

Inactive Publication Date: 2017-06-13
WUHAN PUYOURUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many manufacturers capable of large-scale production of PVC foam core materials. Domestic Changzhou Tiansheng New Materials Co., Ltd. produces Struell series foams that can basically meet the requirements of wind turbine blades, but the foams produced still have low yields and problems. Defects that need to be improved in product quality

Method used

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  • PVC(Polyvinyl chloride) foam core material and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The embodiment of the present invention provides a kind of PVC foam core material, and it adopts following production process to make:

[0055] S101 Prepare raw materials: 50kg PVC, 31.9kg 1,5-naphthalene diisocyanate, 5.1kg AIBN, 2kg AC, 1kg epoxy resin, 8kg succinic anhydride, and 2kg chitosan.

[0056] S102 Mixing: Pour the raw materials except PVC into a planetary mixer for premixing, first mix at 50rpm for 25min, use a homogenizing pump for 2min, then mix at 50rpm for 20min, homogenize for 2min, and then mix at 35rpm 10 minutes, homogenization for 2 minutes, the temperature during premixing is not higher than 30°C, and the premixed material is obtained. Add PVC to the premix, and mix at 35 rpm for 15 minutes under the condition of vacuum ≤ -0.09MPa, and the temperature during main mixing is not higher than 35°C to obtain a pasty mixture.

[0057] S103 Molding: Inject the paste mixture into the mold, cover with a layer of PET film, and then send it to a 1500T multi...

Embodiment 2

[0061] The embodiment of the present invention provides a kind of PVC foam core material, and it adopts following production process to make:

[0062] S201 Prepare raw materials: 60kg PVC, 26.2kg toluene diisocyanate, 4kg AIBN, 2kg AC, 0.6kg epoxy soybean oil, 6.2kg methyl hexahydrophthalic anhydride, and 1kg chitin.

[0063] S202 Mixing: Pour the raw materials other than PVC into a planetary mixer for premixing, mix at 60rpm for 5min, use a homogenizing pump for 3min, and cycle 5 times according to the above process. The temperature during premixing should not be higher than 30°C to obtain a premix. Add PVC to the premix, and mix at 50 rpm for 30 minutes under the condition of vacuum ≤ -0.09MPa, and the temperature during main mixing is not higher than 35°C to obtain a pasty mixture.

[0064] S203 Molding: Inject the pasty mixture into the mold, cover with a layer of PET film, and then send it to the 1500T multi-layer press system for molding. First, the temperature is raise...

Embodiment 3

[0068] The embodiment of the present invention provides a kind of PVC foam core material, and it adopts following production process to make:

[0069] S301 Prepared raw materials: 40kg PVC, 36.5kg carbodiimide modified isocyanate, 7kgAIBN, 3kgAC, 1.5kg epoxy triglyceride, 10kg pyromellitic dianhydride, 2kg alkaloid, 1kg polyethyleneimine (accounting for the remaining raw materials 1% of the total amount).

[0070] S302 Mixing: Pour the raw materials except PVC into a planetary mixer for premixing, first mix at 30rpm for 4min, homogenize for 5min, then mix at 40rpm for 5min, homogenize for 6min, then mix at 50rpm for 6min, homogenize 7min, the temperature during premixing is not higher than 30°C, and the premixed material is obtained. Add PVC to the premix, carry out main mixing, mix at 50 rpm for 30 minutes, the temperature during main mixing is not higher than 35°C, and obtain a pasty mixture.

[0071] S303 molding: inject the paste mixture into the mold, cover with a layer...

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Abstract

The invention discloses a PVC(polyvinyl chloride) foam core material and a production process thereof, and relates to the field of foam materials, the PVC (polyvinyl chloride) foam core material comprises the following raw materials by mass: 30%-80% of PVC (polyvinyl chloride), 10%-50% of an isocyanate, 2%-10% of a foaming agent, 0.5%-4% of an epoxy component, 2%-20% of an anhydride component and 1%-3% of a filler, in production process of the PVC foam core material, first, the raw materials excepting the PVC are pre mixed, then the PVC is added for main mixing, and after the material manner of the two steps of pre mixing and main mixing, a staged temperature control method is used for mould pressing to achieve uniform blank forming, then a staged heating and heat preservation mode is used for expansion, and finally curing is performed. The production process is simple, finished product ratio is high, the production process is suitable for large-scale production; and the prepared PVC foam core material has low density and high strength, and can be used in the field of wind turbine blades and other industries, the finished product ratio is high, and product quality is good.

Description

technical field [0001] The invention relates to the field of foam materials, and in particular to a PVC foam core material and a production process thereof. Background technique [0002] Foam sandwich structure composite material is a sandwich structure that uses resin-based composite material as the skin and foam plastic as the core material. Due to its high strength, light weight, high rigidity, corrosion resistance, electrical insulation, and microwave permeability It is more and more widely used in wind power generation, rail transit, energy-saving buildings, aerospace and other industries, which greatly meets the development needs of these industries. The foam core materials currently used as sandwich structures mainly include polyvinyl chloride (PVC), polystyrene (PS), polyurethane (PUR), polyetherimide (PEI) and other foams. Among them, cross-linked PVC foam has been widely used in various fields because of its stable performance, uniform texture, good dynamic and st...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L63/00C08L91/00C08L5/08C08L79/02C08K5/29C08K5/1515C08K5/1539C08J9/10B29C44/34B29C44/60
CPCC08L27/06B29C44/3415B29C44/3423B29C44/3442B29C44/60C08J9/102C08J9/103C08J2203/04C08J2203/18C08J2327/06C08J2405/08C08J2479/02C08L2203/14C08L2205/03C08L63/00C08L5/08C08K5/29C08K5/1539C08L91/00C08L79/02C08K5/1515
Inventor 李文宇
Owner WUHAN PUYOURUI TECH CO LTD
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