CN110628146A - High-temperature-resistant transparent hard PVC electrical threading pipe and preparation method thereof - Google Patents
High-temperature-resistant transparent hard PVC electrical threading pipe and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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Abstract
The invention provides a high-temperature-resistant transparent hard PVC electrical threading pipe and a preparation method thereof, relates to the technical field of electrical threading pipe formulas and preparation, and comprises a pipe and pipe fittings, wherein the pipe formula comprises PVC, a transparent calcium-zinc stabilizer, a flexibilizer, composite ester, internal lubrication, external lubrication, a processing aid and toner; the pipe fitting comprises PVC, a transparent calcium zinc stabilizer, a toughening agent, a plasticizer, external lubrication, a processing aid and toner. The invention uses the environment-friendly and nontoxic transparent calcium zinc stabilizer as the heat stabilizer for preparing the transparent hard PVC pipe and pipe fittings; the composite ester is adopted to improve the fluidity of PVC resin, reduce the pressure of a machine head, realize the good processing of transparent hard PVC and finally prepare the high-temperature-resistant transparent hard PVC electrical threading pipe.
Description
Technical Field
The invention relates to a formula and a preparation method of an electrician threading pipe, in particular to a high-temperature-resistant transparent hard PVC electrician threading pipe and a preparation method thereof.
Background
The PVC electrical threading system is widely applied to electric wire protection in home interior decoration, building engineering water and electricity installation and the like in recent years due to the advantages of light weight, high mechanical strength, good insulation, convenience in installation, sanitation, no pollution, low price, long service life and the like. At present, the used tubular product of PVC electrician threading system of general use and pipe fitting accessory are opaque PVC material, if take place the electric wire protective layer damage, the condition such as electric wire is knoed, these potential safety hazards can't in time be solved in the discovery. Transparent PVC electrician threading system because its good transparency and visuality, constructor can observe the inside electric wire condition of tubular product at any time, in time discovers and solves the power consumption potential safety hazard, ensures domestic power consumption safety.
In addition, the Vicat softening temperature of the transparent hard PVC electrical threading system is lower than that of an opaque PVC material by 4 ~ 5 ℃ because inorganic fillers such as calcium carbonate can not be added almost, so that the transparent PVC pipe is more difficult to extrude, the pressure of a machine head is increased sharply, a large amount of plasticizer has to be added to improve the fluidity of the transparent hard PVC material and reduce the pressure of the machine head, but the Vicat softening temperature of the pipe is reduced by more than ten ℃ because the inorganic fillers such as calcium carbonate can not be added, and the pipe can be seriously deformed and the normal use is influenced in the stacking and transportation process in high-temperature weather.
The present application was made based on this.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a high-temperature-resistant transparent hard PVC electrical threading pipe and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention uses the environment-friendly and nontoxic transparent calcium zinc stabilizer as the heat stabilizer for preparing the transparent hard PVC pipe and pipe fittings; the composite ester is adopted to improve the fluidity of PVC resin, reduce the pressure of a machine head, realize the good processing of transparent hard PVC and finally prepare the high-temperature-resistant transparent hard PVC electrical threading pipe. The specific scheme is as follows:
100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 7 parts of flexibilizer, 1 ~ 3 parts of composite ester, 0 ~ 1 part of internal lubricant, 0 ~ 2 part of external lubricant, 0.5 ~ 2 part of processing aid and 10 ~ 50 g of toner;
as a preferable scheme, the formula of the pipe fitting comprises the following components, by weight, 100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 5 parts of toughening agent, 0 ~ 2 part of plasticizer, 0 ~ 1 part of external lubricant, 2 ~ 6 parts of processing aid and 10 ~ 50 g of toner.
As a preferred scheme, the polymerization degree of the PVC resin used in the formula of the pipe is 1000; the polymerization degree of the PVC resin used in the formula of the pipe fitting is 1000.
As a preferred scheme, the toughening agent used in the formula of the pipe is MBS; the toughening agent used in the formula of the pipe fitting is MBS.
As a preferable scheme, the internal lubrication used in the formula of the pipe is one or two of W-60 and L-60, and W-60 is a polyfunctional fatty acid alcohol ester polymer which is suitable for transparent products and has the functions of promoting the plasticization of PVC and improving the fluidity of PVC melt and the smoothness of the surface of the pipe. However, the amount of W-60 added needs to be strictly controlled, otherwise zinc burn may result. L-60 is saturated fatty alcohol dicarboxylic acid ester, and the small amount of addition can also improve the flowability of PVC and has little influence on the transparency of the PVC.
Preferably, the external lubricant used in the formula of the pipe is one or more of G-74, OPE wax and composite wax. G-74 is a transparent polymer composite grease, has strong polarity and large compatibility with PVC, and is not easy to separate out in the processing process. The G-74, the OPE wax and the composite wax can reduce the friction among PVC resin molecules, reduce the friction among the resin molecules, the wall of the screw barrel and the screw, improve the fluidity of PVC melt and reduce the plasticizing temperature. The transparency of the PVC is slightly influenced by adding the G-74, the OPE wax and the composite wax in proper amounts.
Preferably, the plasticizer used in the formulation of the fitting is dioctyl phthalate. In the injection molding process, the zinc burning is easily caused due to the excessive shearing of the melt, the dioctyl phthalate can obviously improve the fluidity of the melt and avoid the zinc burning, but the addition amount of the dioctyl phthalate is not more than 2 parts, otherwise, the Vicat softening temperature is obviously reduced.
Preferably, the external lubricant used in the formulation of the pipe fitting is one or more of G-74, OPE wax and composite wax.
A preparation method of a high-temperature-resistant transparent hard PVC electrical threading pipe comprises the following steps:
(1) mixing the pipe materials, namely weighing 100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 7 parts of toughening agent, 1 ~ 3 parts of composite ester, 0 ~ 1 parts of internal lubrication, 0 ~ 2 parts of external lubrication, 0.5 ~ 2 parts of processing aid and 10 ~ 50 g of toner according to the proportion, adding the materials into a high-speed mixer, mixing the materials at a high speed until the temperature reaches 110 ~ 120 ℃ and 120 ℃, cold mixing the materials, and discharging the materials;
(2) preparing a PVC electrical threading pipe: extruding the mixed material obtained in the step (1) to obtain a pipe;
(3) mixing pipe fittings and materials, namely weighing 100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 5 parts of toughening agent, 0 ~ 2 part of plasticizer, 0 ~ 1 parts of external lubricant, 2 ~ 6 parts of processing aid and 10 ~ 50 g of toner according to the proportion, adding the materials into a high-speed mixer, mixing the materials at a high speed until the temperature is 110 ~ 120 ℃, cold mixing the materials and discharging the materials;
(4) preparing PVC electrical threading pipe fittings: granulating the mixed material obtained in the step (3) at a low temperature, and then performing injection molding to obtain pipe fittings;
(5) preparation of PVC electrical threading system: and (4) carrying out socket assembling on the pipe and the pipe fitting in the steps (2) and (3) according to the requirement to obtain the PVC electrical threading system.
In the step (2), the extrusion temperature is 180 ~ 200 ℃, the extrusion temperature of the transparent PVC is 180 ℃, the PVC needs to be fully plasticized, the plasticizing temperature is not lower than 180 ℃, the plasticization is poor, and the transparency is affected, and the melt strength of the PVC without the filler is low, and the temperature of a die is not higher than 200 ℃ in order to ensure enough melt strength to pull the pipe.
Preferably, in the step (4), the pelletizing and extrusion temperature is 140 ~ 160 ℃, the injection molding temperature is 170 ~ 200 ℃, the pelletizing process needs to realize primary plasticization of PVC and cannot excessively consume a stabilizer, so that the PVC can be processed at low temperature, and the temperature is not excessively high because zinc burning caused by shearing of high-strength melt is prevented during injection molding.
The principle and the beneficial effects of the invention are as follows:
(1) the invention adopts the transparent calcium zinc stabilizer to replace the traditional organic tin stabilizer, prepares the pipe and the pipe fitting with good transparency, and is convenient for construction observation.
(2) The invention adopts the composite ester to improve the plasticizing property and the fluidity of the PVC, reduces the pressure of the machine head, enables the PVC to be extruded more easily, realizes the good processing of the transparent hard PVC,
(3) the pipe does not use any liquid plasticizer, so that the pipe keeps higher Vicat softening temperature.
(4) The polymerization degree of the PVC resin adopted by the pipe and the pipe fitting is 1000, so that the heat resistance of the pipe and the pipe fitting can be basically consistent.
(5) In the invention, no plasticizer or a small amount of plasticizer is added to the pipe fitting, so that the pipe fitting keeps a higher Vicat softening temperature.
(6) The MBS is added to ensure that the pipe and the pipe fittings have good toughness and can meet the low-temperature use requirement.
Therefore, the invention has good transparency and visibility, environment-friendly material selection and process, and easy extrusion of the transparent PVC pipe in the manufacturing process while ensuring higher Vicat softening temperature.
Detailed Description
In order to make the technical means of the present invention and the technical effects achieved thereby clearer and more complete, 3 embodiments are provided for detailed description:
example 1
The high-temperature-resistant transparent hard PVC electrical threading system prepared from the calcium-zinc stabilizer comprises a pipe and pipe fittings, wherein the pipe comprises the following components in parts by weight: 100 parts of PVC, 3 parts of transparent calcium zinc stabilizer, 4 parts of toughening agent, 1.5 parts of composite ester, 0.1 part of external lubricant, 0.5 part of processing aid and 20 g of toner; the formula of the pipe fitting comprises the following components in parts by weight: 100 parts of PVC, 3.5 parts of transparent calcium zinc stabilizer, 3 parts of toughening agent, 0.5 part of plasticizer, 0.6 part of external lubricant, 4 parts of processing aid and 20 g of toner.
The polymerization degree of the PVC resin used in the formula of the pipe is 1000.
The toughening agent used in the formula of the pipe is MBS.
The external lubricant used in the formula of the pipe is composite wax.
The polymerization degree of the PVC resin used in the formula of the pipe fitting is 1000.
The toughening agent used in the formula of the pipe fitting is MBS.
The plasticizer used in the formula of the pipe fitting is dioctyl phthalate.
The external lubrication used for the pipe fitting formulation was G-74.
The preparation method of the high-temperature-resistant transparent hard PVC electrical threading system comprises the following steps:
(1) mixing pipe materials: 100 parts of PVC, 3 parts of transparent calcium zinc stabilizer, 4 parts of toughening agent, 1.5 parts of composite ester, 0.1 part of external lubricant, 0.5 part of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer, the mixture is mixed at a high speed to 110 ℃, and then the mixture is subjected to cold mixing and discharging;
(2) preparing a PVC electrical threading pipe: and (3) extruding the mixed material obtained in the step (1) to obtain the pipe.
(3) Mixing pipe fittings: 100 parts of PVC, 3.5 parts of transparent calcium zinc stabilizer, 3 parts of toughening agent, 0.5 part of plasticizer, 0.6 part of external lubricant, 4 parts of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer, the mixture is mixed at a high speed to 110 ℃, and the mixture is subjected to cold mixing and discharging;
(4) preparing PVC electrical threading pipe fittings: and (4) extruding and granulating the mixed material obtained in the step (3) at 150 ℃, and then performing injection molding at 195 ℃ to obtain the pipe fitting.
(5) Preparation of PVC electrical threading system: and (5) carrying out socket assembling on the pipe and the pipe fitting in the steps (2) and (4) according to the requirement to obtain the PVC electrical threading system.
The vicat softening temperatures of the transparent hard PVC electrical threading pipe and the pipe fitting prepared in this example were 84.6 ℃ and 83.1 ℃ respectively.
Example 2
The high-temperature-resistant transparent hard PVC electrical threading system prepared from the calcium-zinc stabilizer comprises a pipe and pipe fittings, wherein the pipe comprises the following components in parts by weight: 100 parts of PVC, 4 parts of transparent calcium zinc stabilizer, 4.5 parts of toughening agent, 1.8 parts of composite ester, 0.9 part of external lubricant, 1 part of processing aid and 20 g of toner; the formula of the pipe fitting comprises the following components in parts by weight: 100 parts of PVC, 4 parts of transparent calcium zinc stabilizer, 3 parts of toughening agent, 1 part of plasticizer, 0.6 part of external lubricant, 4.5 parts of processing aid and 20 g of toner.
The polymerization degree of the PVC resin used in the formula of the pipe is 1000.
The toughening agent used in the formula of the pipe is MBS.
The external lubrication used for the tubing formulation was G-74.
The polymerization degree of the PVC resin used in the formula of the pipe fitting is 1000.
The toughening agent used in the formula of the pipe fitting is MBS.
The plasticizer used in the formula of the pipe fitting is dioctyl phthalate.
The external lubrication used for the pipe fitting formulation was G-74.
The preparation method of the high-temperature-resistant transparent hard PVC electrical threading system comprises the following steps:
(1) mixing pipe materials: 100 parts of PVC, 4 parts of transparent calcium zinc stabilizer, 4.5 parts of toughening agent, 1.8 parts of composite ester, 0.9 part of external lubricant, 1 part of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer, the mixture is mixed at a high speed to 110 ℃, and then the mixture is subjected to cold mixing and discharging;
(2) preparing a PVC electrical threading pipe: and (3) extruding the mixed material obtained in the step (1) to obtain the pipe.
(3) Mixing pipe fittings: 100 parts of PVC, 4 parts of transparent calcium zinc stabilizer, 3 parts of toughening agent, 1 part of plasticizer, 0.6 part of external lubricant, 4.5 parts of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer to be mixed at a high speed to 110 ℃, and then the mixture is subjected to cold mixing and discharging;
(4) preparing PVC electrical threading pipe fittings: and (4) extruding and granulating the mixed material obtained in the step (3) at 145 ℃, and then performing injection molding at 195 ℃ to obtain the pipe fitting.
(5) Preparation of PVC electrical threading system: and (5) carrying out socket assembling on the pipe and the pipe fitting in the steps (2) and (4) according to the requirement to obtain the PVC electrical threading system.
The vicat softening temperatures of the transparent hard PVC electrical threading pipe and the pipe fitting prepared in this example were 85.2 ℃ and 81.7 ℃ respectively.
Example 3
The high-temperature-resistant transparent hard PVC electrical threading system prepared from the calcium-zinc stabilizer comprises a pipe and pipe fittings, wherein the pipe comprises the following components in parts by weight: 100 parts of PVC, 4.5 parts of transparent calcium zinc stabilizer, 5 parts of toughening agent, 2.5 parts of composite ester, 0.1 part of external lubricant, 1 part of processing aid and 20 g of toner; the formula of the pipe fitting comprises the following components in parts by weight: 100 parts of PVC, 5 parts of transparent calcium zinc stabilizer, 3.5 parts of toughening agent, 2 parts of plasticizer, 0.3 part of external lubricant, 5 parts of processing aid and 20 g of toner.
The polymerization degree of the PVC resin used in the formula of the pipe is 1000.
The toughening agent used in the formula of the pipe is MBS.
The external lubricant used in the formula of the pipe is composite wax.
The polymerization degree of the PVC resin used in the formula of the pipe fitting is 1000.
The toughening agent used in the formula of the pipe fitting is MBS.
The plasticizer used in the formula of the pipe fitting is dioctyl phthalate.
The external lubrication used for the pipe fitting formulation was G-74.
The preparation method of the high-temperature-resistant transparent hard PVC electrical threading system comprises the following steps:
(1) mixing pipe materials: 100 parts of PVC, 4.5 parts of transparent calcium zinc stabilizer, 5 parts of toughening agent, 2.5 parts of composite ester, 0.1 part of external lubricant, 1 part of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer, the mixture is mixed at a high speed to 115 ℃, and then the mixture is subjected to cold mixing and discharging;
(2) preparing a PVC electrical threading pipe: and (3) extruding the mixed material obtained in the step (1) to obtain the pipe.
(3) Mixing pipe fittings: 100 parts of PVC, 5 parts of transparent calcium zinc stabilizer, 3.5 parts of toughening agent, 2 parts of plasticizer, 0.3 part of external lubricant, 5 parts of processing aid and 20 g of toner are respectively weighed according to the proportion and added into a high-speed mixer to be mixed at a high speed to 115 ℃, and then the mixture is subjected to cold mixing and discharging;
(4) preparing PVC electrical threading pipe fittings: and (4) extruding and granulating the mixed material obtained in the step (3) at 160 ℃, and then performing injection molding at 195 ℃ to obtain the pipe fitting.
(5) Preparation of PVC electrical threading system: and (5) carrying out socket assembling on the pipe and the pipe fitting in the steps (2) and (4) according to the requirement to obtain the PVC electrical threading system.
The vicat softening temperatures of the transparent hard PVC electrical threading pipe and the pipe fitting prepared in this example were 85.4 ℃ and 80.7 ℃, respectively.
Examples 1-3 additional performance test results for PVC tubing:
bending property: the pipes were free of cracks as measured by the 6.6 standard in JG 3050-1998.
Electrical properties: the voltage is 2000V, the pipe is not broken down after 15 min, and the insulation resistance R is more than 550M omega.
The above description is provided for the purpose of further elaboration of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that various simple deductions or substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and all such alternatives are included in the scope of the present invention.
Claims (10)
1. The utility model provides a high temperature resistant transparent stereoplasm PVC electrician threading pipe, includes tubular product and pipe fitting accessory, its characterized in that:
the formula of the pipe comprises, by weight, 100 parts of PVC, 2.5 ~ 5 parts of a transparent calcium zinc stabilizer, 3 ~ 7 parts of a toughening agent, 1 ~ 3 parts of a composite ester, 0 ~ 1 parts of an internal lubricant, 0 ~ 2 parts of an external lubricant, 0.5 ~ 2 parts of a processing aid and 10 ~ 50 g of a toner;
the formula of the pipe fitting comprises, by weight, 100 parts of PVC, 2.5 ~ 5 parts of a transparent calcium zinc stabilizer, 3 ~ 5 parts of a toughening agent, 0 ~ 2 part of a plasticizer, 0 ~ 1 parts of external lubricant, 2 ~ 6 parts of a processing aid and 10 ~ 50 g of toner.
2. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the polymerization degree of the PVC resin used in the formula of the pipe is 1000; the polymerization degree of the PVC resin used in the formula of the pipe fitting is 1000.
3. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the toughening agent used in the formula of the pipe is MBS; the toughening agent used in the formula of the pipe fitting is MBS.
4. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the internal lubrication used in the formula of the pipe is one or two of W-60 and L-60.
5. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the external lubricant used in the formula of the pipe is one or more of G-74, OPE wax and composite wax.
6. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the plasticizer used in the formula of the pipe fitting is dioctyl phthalate.
7. The high temperature resistant transparent hard PVC electrical conduit according to claim 1, wherein: the external lubrication used in the formula of the pipe fitting is one or more of G-74, OPE wax and composite wax.
8. A preparation method of a high-temperature-resistant transparent hard PVC electrical threading pipe comprises the following steps:
(1) mixing the pipe materials, namely weighing 100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 7 parts of toughening agent, 1 ~ 3 parts of composite ester, 0 ~ 1 parts of internal lubrication, 0 ~ 2 parts of external lubrication, 0.5 ~ 2 parts of processing aid and 10 ~ 50 g of toner according to the proportion, adding the materials into a high-speed mixer, mixing the materials at a high speed until the temperature reaches 110 ~ 120 ℃ and 120 ℃, cold mixing the materials, and discharging the materials;
(2) preparing a PVC electrical threading pipe: extruding the mixed material obtained in the step (1) to obtain a pipe;
(3) mixing pipe fittings and materials, namely weighing 100 parts of PVC, 2.5 ~ 5 parts of transparent calcium zinc stabilizer, 3 ~ 5 parts of toughening agent, 0 ~ 2 part of plasticizer, 0 ~ 1 parts of external lubricant, 2 ~ 6 parts of processing aid and 10 ~ 50 g of toner according to the proportion, adding the materials into a high-speed mixer, mixing the materials at a high speed until the temperature is 110 ~ 120 ℃, cold mixing the materials and discharging the materials;
(4) preparing PVC electrical threading pipe fittings: granulating the mixed material obtained in the step (3) at a low temperature, and then performing injection molding to obtain pipe fittings;
(5) preparation of PVC electrical threading system: and (4) carrying out socket assembling on the pipe and the pipe fitting in the steps (2) and (3) according to the requirement to obtain the PVC electrical threading system.
9. The method for preparing a high temperature resistant transparent rigid PVC electrical conduit as claimed in claim 8, wherein the extrusion temperature in the step (2) is 180 ~ 200 ℃.
10. The method for preparing a high temperature resistant transparent rigid PVC electrical conduit as claimed in claim 8, wherein in the step (4), the extrusion temperature for granulation is 140 ~ 160 ℃ and the injection molding temperature is 170 ~ 200 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104877251A (en) * | 2015-03-31 | 2015-09-02 | 杭州鸿雁电器有限公司 | Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof |
| CN107739480A (en) * | 2017-10-12 | 2018-02-27 | 福建亚通新材料科技股份有限公司 | A kind of toughening type resistance to compression Reinforced PVC U electrical casing pipes |
| CN109438879A (en) * | 2018-11-09 | 2019-03-08 | 上海上塑控股（集团）有限公司 | A kind of transparent electrical casing pipe |
-
2019
- 2019-09-09 CN CN201910845823.7A patent/CN110628146A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104877251A (en) * | 2015-03-31 | 2015-09-02 | 杭州鸿雁电器有限公司 | Environment-friendly, low-smoke and lead-free PVC electrical tube and preparation method thereof |
| CN107739480A (en) * | 2017-10-12 | 2018-02-27 | 福建亚通新材料科技股份有限公司 | A kind of toughening type resistance to compression Reinforced PVC U electrical casing pipes |
| CN109438879A (en) * | 2018-11-09 | 2019-03-08 | 上海上塑控股（集团）有限公司 | A kind of transparent electrical casing pipe |
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Inventor after: Cui Chenghua Inventor after: Xu Xin Inventor after: Qian Gonghai Inventor before: Chen Lingfang Inventor before: Han Pengfeng Inventor before: Qian Gonghai |
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Application publication date: 20191231 |