PVC-U (polyvinyl chloride unplasticized) tube with shape memory function and production method and application thereof

A PVC-U and pipe technology, which is applied to the PVC-U pipe with shape memory function and its preparation field, can solve the problems of limiting the application of PVC-U shape memory pipe and complicated processing technology, and achieves good memory deformation function, comprehensive The effect of good performance and high deformation recovery rate

Active Publication Date: 2018-08-07
RIFENG ENTERPRISE FOSHAN CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to achieve the deformation memory effect of this PVC-U pipe, its cross-linking requirements are very high, and the gel degree reaches 60%. Special equipment must be used to realize the chemical cross-linking of its molecular chains, which makes its processing technology very complicated and greatly Limiting the Application of PVC-U Deformation Memory Pipes in Trenchless Fields

Method used

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  • PVC-U (polyvinyl chloride unplasticized) tube with shape memory function and production method and application thereof
  • PVC-U (polyvinyl chloride unplasticized) tube with shape memory function and production method and application thereof
  • PVC-U (polyvinyl chloride unplasticized) tube with shape memory function and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Prepare the PVC-U pipe material with shape memory function, its formula comprises each component of following mass parts:

[0054] Polyvinyl chloride resin SG-5: 100 parts; calcium zinc heat stabilizer CZ-8601E-2: 3.5 parts; lubricant polyethylene oxide wax: 0.5 parts; processing modifier copolymer of methacrylate and ethyl acrylate : 1.5 parts; ethylene-vinyl acetate-carbonyl copolymer (toughening agent): 6 parts; 0.58 parts of crosslinking agent (wherein, dicumyl peroxide (DCP): 0.08 parts; phthalic acid diene Propyl ester (DAP): 0.5 parts); acid absorbent magnesium oxide: 3.0 parts; filler calcium carbonate: 20 parts; pigment titanium dioxide 2.0 parts.

[0055] The method for preparing a PVC-U pipe with shape memory function specifically includes the following steps:

[0056] (1) Put the polyvinyl chloride resin, heat stabilizer, processing modifier, toughening agent, and plasticizer (0 parts of plasticizer in this embodiment) into the high-speed mixing unit (Zhang...

Embodiment 2

[0060] Prepare the PVC-U pipe material with shape memory function, its formula comprises each component of following mass parts:

[0061] Polyvinyl chloride resin SG-5: 100 parts; thiol octyl tin T-890: 2.0 parts; lubricant fatty alcohol: 0.5 parts; lubricant monoglyceride monooleate: 0.2 parts; plasticizer epoxy soybean oil (ESO ): 2 parts; processing modifier methyl methacrylate-ethyl methacrylate-ethyl acrylate copolymer: 0.8 parts; toughening agent ethylene-butyl acrylate-carbonyl copolymer (E / nBA / CO): 5 parts; crosslinking agent dithiotetramethylthiuram (TMTD): 2.5 parts; acid absorbent (magnesium oxide: 3.0 parts; zinc oxide: 2.0 parts); filler calcium carbonate: 15 parts, pigment titanium dioxide 2.0 parts share.

[0062] The specific steps of the method for preparing a PVC-U pipe with shape memory function in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0064] Prepare the PVC-U pipe material with shape memory function, its formula comprises each component of following mass parts:

[0065] Polyvinyl chloride resin SG-5: 80 parts; PVC resin SG-3: 20 parts; calcium zinc heat stabilizer CZ-8601E-2: 3.8 parts; lubricant OP wax: 0.8 parts; lubricant homopolyethylene Wax 0.1 part; plasticizer epoxy butyl stearate (EBST): 0.5 part; processing modifier methyl methacrylate-styrene-butyl acrylate copolymer: 1.2 part; toughening agent ethylene-vinyl acetate Ester-carbonyl copolymer (E / VA / CO): 4 parts; crosslinking agent 1.6 parts (DCP: 0.1 part; triallyl isocyanurate (TAIC): 1.5 parts); acid absorbent zinc oxide: 2 parts; filler talcum powder: 8 parts, pigment titanium dioxide 2.0 parts.

[0066] The specific steps of the method for preparing a PVC-U pipe with shape memory function in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a PVC-U (polyvinyl chloride unplasticized) tube with a shape memory function and a production method and application thereof. The PVC-U tube with the shape memory function is made from, by weight, 100 parts of polyvinyl chloride resin, 1.5-8.0 parts of a thermal stabilizer, 0.1-60 parts of a lubricant, 0-8 parts of a plasticizer, 0.5-8 parts of a processing modifier, 1-10 parts of a toughener, 0.02-5 parts of a crosslinker, 0-6 parts of an acid absorbent, and 0-30 parts of a filler. The PVC-U tube has the good shape memory function and is particularly suitable for the repair of a damaged conduit under micro-excavation or zero excavation. In addition, the production method of the PVC-U tube is simple and low in cost.

Description

technical field [0001] The invention relates to the technical field of preparation of PVC-U pipes with shape memory function, in particular to a PVC-U pipe with shape memory function and its preparation method and application. Background technique [0002] With the successive arrival of service life of pipelines in urban underground pipeline network, pipeline repair technology has attracted people's attention day by day. Traditional pipeline repair and pipeline replacement technologies not only lead to high construction costs, but also bring serious disturbance and impact to the residents and community life in the construction area. [0003] The "U"-shaped plastic pipe lining repair technology based on the principle of shape memory is to press the extruded circular plastic pipe (with a circular cross-section) into a "U" shape through a deformation device to make it change in diameter or After shrinking. After it is penetrated into the damaged pipe, it can be restored to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/14C08K5/40C08K5/3492C08K5/12C08K5/37
CPCC08L27/06C08L2201/12C08L2203/18C08L2205/025C08L2205/035C08L2312/00C08L71/02C08K13/02C08K5/14C08K5/12C08L91/00C08K5/40C08K5/34924C08L91/06C08K5/378
Inventor 曾富财汪磊李白千郑立贤刘在福
Owner RIFENG ENTERPRISE FOSHAN CO LTD
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