阅读说明：本技术 一种提高高密度聚乙烯缠绕结构壁管环刚度方法 (Method for improving ring stiffness of high-density polyethylene winding structure wall pipe ) 是由 徐冶锋 程晓军 邱祥玉 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种提高高密度聚乙烯缠绕结构壁管环刚度方法,包括高密度聚乙烯PE100等级YGH041原料、硅钙镁晶须、薄膜级EVA14-2、偶联剂、抗氧剂1010。本发明属于高密度聚乙烯生产技术领域,具体是指一种提高高密度聚乙烯缠绕结构壁管环刚度方法；本发明通过在聚乙烯的配方中加入硅钙镁晶须,聚烯烃弹性体,使用马来酸酐接枝线性低密度聚乙烯作为增容剂,改善材料机械性能,用这种新型的聚乙烯材料加工成型的壁管结构,在冲击强度不变或略有增长的情况下,弯曲模量由800MPa提高到1900MPa,环刚度6.1kN/m～(2)提高到10.8kN/m～(2)；有效解决了目前市场上的埋设管道的结构壁管环刚度不足的问题。(The invention discloses a method for improving ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises a high-density polyethylene PE100 grade YGH041 raw material, silicon-calcium-magnesium whiskers, film grade EVA14-2, a coupling agent and an antioxidant 1010. The invention belongs to the technical field of high-density polyethylene production, and particularly relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe; the invention improves the mechanical property of the material by adding silicon calcium magnesium whisker and polyolefin elastomer into the formula of polyethylene and using maleic anhydride grafted linear low density polyethylene as a compatibilizer, and the bending modulus of a wall pipe structure processed and formed by the novel polyethylene material is from 8 under the condition that the impact strength is not changed or is slightly increased00MPa is increased to 1900MPa, and the ring stiffness is 6.1kN/m 2 Increased to 10.8kN/m 2 (ii) a The problem of the structural wall pipe ring rigidity of buried pipeline in the existing market is not enough is effectively solved.)

1. A method for improving the rigidity of a high-density polyethylene winding structure wall pipe ring is characterized by comprising the following steps: comprises high-density polyethylene PE100 grade YGH041 raw material, silicon-calcium-magnesium whisker, film grade EVA14-2, coupling agent and antioxidant 1010; the formula comprises the following raw materials in percentage by weight: 70% of high-density polyethylene PE100 grade YGH041 raw material, 25.1% of silicon-calcium-magnesium whisker, 14-23% of film grade EVA, 1.9% of coupling agent and 1% of antioxidant 1010.

2. The method for improving the ring stiffness of the high-density polyethylene winding structure wall pipe according to claim 1, wherein the method comprises the following steps: the high density polyethylene PE100 grade YGH041 feedstock had a melt flow rate MFR of 0.1g/10min (2.16kg,190 ℃).

3. The method for improving the ring stiffness of the high-density polyethylene winding structure wall pipe according to claim 2, wherein the method comprises the following steps: the length-diameter ratio of the silicon-calcium-magnesium whisker is more than or equal to 10, and the silicon-calcium-magnesium whisker is in a short fiber shape of 20 um.

4. The method for improving the ring stiffness of the high-density polyethylene winding structure wall pipe according to claim 3, wherein the method comprises the following steps: the film grade EVA14-2 has a melt flow rate MFR of 2g/10min (2.16kg,190 ℃).

5. A method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe comprises the following production steps of a novel high-density polyethylene material:

the method comprises the following steps: analyzing and testing various main technical indexes of the raw materials to ensure that the indexes meet the requirements;

step two: drying the silicon-calcium-magnesium whisker in an oven at 80 ℃ for 3 hours, and mixing the silicon-calcium-magnesium whisker and a coupling agent in a high-speed mixer for pretreatment for 20 minutes;

step three: 70 percent of high-density polyethylene PE100 grade YGH041 resin, 25.1 percent of silicon-calcium-magnesium whisker, 3 percent of EVA and 1 thousandth of antioxidant are mixed in a high-speed mixer for 10 minutes;

step four: and adding the mixed materials into a hopper, and starting a hopper feeder to prevent the materials from bridging.

6. A method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe comprises the following operation steps of pipe wall production:

the method comprises the following steps: preparing: preparing special materials and respectively putting the special materials into a plate die extruder and a rib pipe extruder hopper, and starting an anti-bridging feeding motor during production; heating for 1 hour according to the set temperature of the process;

step two: starting up: firstly, opening a plate die extruder, and winding the material belt extruded from the plate die on a plurality of cold rolling shafts; then, opening a rib pipe extruder to lead the polypropylene rib pipe into the extruded pipe blank, and winding the polypropylene rib pipe on the surface of the formed pipe to prepare the pipe with the outer surface of the spiral O-shaped rib;

step three: and (3) cooling: extruding the formed pipe while cooling;

step four: cutting: when the required length is reached, manually cutting;

step five: and (3) detection: and detecting the appearance and the specification size according to the national standard, and entering the next production procedure if the detection is qualified.

Technical Field

The invention belongs to the technical field of high-density polyethylene production, and particularly relates to a method for improving the ring stiffness of a wall pipe with a high-density polyethylene winding structure.

Background

The ring stiffness refers to the load borne by the pressure pipe, specifically divided into internal pressure and external pressure, and for the pressureless pipe, mainly refers to the external pressure load borne by the pressureless pipe.

The invention provides a method for improving the rigidity of a pipe ring of a high-density polyethylene winding structure wall, which aims to optimize the high-density polyethylene material for pipe production and solve the problem of insufficient rigidity of the pipe ring of the high-density polyethylene winding structure wall.

Disclosure of Invention

Aiming at the situation and overcoming the defects of the prior art, the invention provides a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, silicon-calcium-magnesium whisker and a polyolefin elastomer are added into a polyethylene formula, maleic anhydride grafted linear low-density polyethylene is used as a compatibilizer to improve the mechanical property of the material, and the wall pipe structure formed by processing the novel polyethylene material has the advantages that the bending modulus is improved from 800MPa to 1900MPa and the ring stiffness is 6.1kN/m under the condition that the impact strength is unchanged or slightly increased²Increased to 10.8kN/m²(ii) a The calcium-magnesium crystal whisker has a typical value of about 1um, is of a one-dimensional single crystal structure, has the strength close to a theoretical value, has excellent mechanical property, large elastic deformation range, good fluidity in polyethylene resin, and easy processing and forming, and effectively solves the problem of insufficient rigidity of a structural wall pipe ring of an embedded pipeline in the current market.

The technical scheme adopted by the invention is as follows: the invention relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises the following steps:

comprises high-density polyethylene PE100 grade YGH041 raw material, silicon-calcium-magnesium whisker, film grade EVA14-2, coupling agent and antioxidant 1010.

Further, the formula comprises the following raw materials in percentage by weight: 70% of high-density polyethylene PE100 grade YGH041 raw material, 25.1% of silicon-calcium-magnesium whisker, 14-23% of film grade EVA, 1.9% of coupling agent and 1% of antioxidant 1010.

Further, the high density polyethylene PE100 grade YGH041 feedstock had a melt flow rate MFR of 0.1g/10min (2.16kg,190 ℃).

Furthermore, the length-diameter ratio of the silicon-calcium-magnesium crystal whisker is more than or equal to 10, and the silicon-calcium-magnesium crystal whisker is in a short fiber shape of 20 um.

Further, the film grade EVA14-2 has a melt flow rate MFR of 2g/10min (2.16kg,190 ℃).

The invention relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises the following production steps of:

the method comprises the following steps: analyzing and testing various main technical indexes of the raw materials to ensure that the indexes meet the requirements;

step two: drying the silicon-calcium-magnesium whisker in an oven at 80 ℃ for 3 hours, and mixing the silicon-calcium-magnesium whisker and a coupling agent in a high-speed mixer for pretreatment for 20 minutes;

step three: 70 percent of high-density polyethylene PE100 grade YGH041 resin, 25.1 percent of silicon-calcium-magnesium whisker, 3 percent of EVA and 1 thousandth of antioxidant are mixed in a high-speed mixer for 10 minutes;

step four: and adding the mixed materials into a hopper, and starting a hopper feeder to prevent the materials from bridging.

The invention relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises the following operation steps of pipe wall production:

the method comprises the following steps: preparing: preparing special materials and respectively putting the special materials into a plate die extruder and a rib pipe extruder hopper, and starting an anti-bridging feeding motor during production; heating for 1 hour according to the set temperature of the process;

step two: starting up: firstly, opening a plate die extruder, and winding the material belt extruded from the plate die on a plurality of cold rolling shafts; then, opening a rib pipe extruder to lead the polypropylene rib pipe into the extruded pipe blank, and winding the polypropylene rib pipe on the surface of the formed pipe to prepare the pipe with the outer surface of the spiral O-shaped rib;

step three: and (3) cooling: extruding the formed pipe while cooling;

step four: cutting: when the required length is reached, manually cutting;

step five: and (3) detection: and detecting the appearance and the specification size according to the national standard, and entering the next production procedure if the detection is qualified.

The invention with the structure has the following beneficial effects: the method for improving the ring stiffness of the wall pipe with the high-density polyethylene winding structure comprises the steps of adding silicon-calcium-magnesium whiskers and polyolefin elastomer into a polyethylene formula, using maleic anhydride grafted linear low-density polyethylene as a compatibilizer, improving the mechanical property of the material, and processing the wall pipe structure formed by the novel polyethylene material into a pipe with the bending modulus of 800MPa to 1900MPa and the ring stiffness of 6.1kN/m under the condition that the impact strength is unchanged or slightly increased²Increased to 10.8kN/m²(ii) a The calcium-magnesium crystal whisker has a typical value of about 1um, is of a one-dimensional single crystal structure, has the strength similar to a theoretical value, has excellent mechanical property, large elastic deformation range, good fluidity in polyethylene resin, is easy to machine and form, and effectively solves the problem of insufficient rigidity of a structural wall pipe ring of an embedded pipeline in the current market; according to experimental measurements, using the process modified by the invention, the following changes in the properties of the raw materials were produced: the melt flow rate is changed from 0.4g g/10min to 0.36g/10min (5kg,190 ℃), the flexural modulus is improved from 800MPa to 1900MPa, the tensile strength is 21MPa, the tensile strength is improved to 23MPa, the elongation at break is 670%, the flexural modulus is improved to 690%, and the impact strength (unnotched) of a simply supported beam is 11KJ/m2 and is improved to 13.5KJ/m 2; the straight sides of the pipeline technology are changed as follows: the ring rigidity of 6.1kN/m2 is improved to 10.8kN/m2, the impact performance TIR is improved, and 120 samples, 6 impact damage numbers before modification and 5 impact damage numbers after modification are respectively randomly extracted from the pipes before and after modification according to the requirements of GB/T14152.

Drawings

FIG. 1 is a flow chart of a production process of the method for improving the rigidity of the high-density polyethylene winding structure wall pipe ring.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in FIG. 1, the method for improving the ring stiffness of the high-density polyethylene winding structure wall pipe comprises the following material formula:

comprises high-density polyethylene PE100 grade YGH041 raw material, silicon-calcium-magnesium whisker, film grade EVA14-2, coupling agent and antioxidant 1010.

The formula comprises the following raw materials in percentage by weight: 70% of high-density polyethylene PE100 grade YGH041 raw material, 25.1% of silicon-calcium-magnesium whisker, 14-23% of film grade EVA, 1.9% of coupling agent and 1% of antioxidant 1010.

The high density polyethylene PE100 grade YGH041 feedstock had a melt flow rate MFR of 0.1g/10min (2.16kg,190 ℃).

The length-diameter ratio of the silicon-calcium-magnesium whisker is more than or equal to 10, and the silicon-calcium-magnesium whisker is in a short fiber shape of 20 um.

The film grade EVA14-2 has a melt flow rate MFR of 2g/10min (2.16kg,190 ℃).

The invention relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises the following production steps of:

the method comprises the following steps: analyzing and testing various main technical indexes of the raw materials to ensure that the indexes meet the requirements;

step two: drying the silicon-calcium-magnesium whisker in an oven at 80 ℃ for 3 hours, and mixing the silicon-calcium-magnesium whisker and a coupling agent in a high-speed mixer for pretreatment for 20 minutes;

step three: 70 percent of high-density polyethylene PE100 grade YGH041 resin, 25.1 percent of silicon-calcium-magnesium whisker, 3 percent of EVA and 1 thousandth of antioxidant are mixed in a high-speed mixer for 10 minutes;

step four: and adding the mixed materials into a hopper, and starting a hopper feeder to prevent the materials from bridging.

The invention relates to a method for improving the ring stiffness of a high-density polyethylene winding structure wall pipe, which comprises the following operation steps of pipe wall production:

the method comprises the following steps: preparing: preparing special materials and respectively putting the special materials into a plate die extruder and a rib pipe extruder hopper, and starting an anti-bridging feeding motor during production; heating for 1 hour according to the set temperature of the process;

step two: starting up: firstly, opening a plate die extruder, and winding the material belt extruded from the plate die on a plurality of cold rolling shafts; then, opening a rib pipe extruder to lead the polypropylene rib pipe into the extruded pipe blank, and winding the polypropylene rib pipe on the surface of the formed pipe to prepare the pipe with the outer surface of the spiral O-shaped rib;

step three: and (3) cooling: extruding the formed pipe while cooling;

step four: cutting: when the required length is reached, manually cutting;

step five: and (3) detection: and detecting the appearance and the specification size according to the national standard, and entering the next production procedure if the detection is qualified.

When the silicon-calcium-magnesium whisker is used specifically, a user firstly prepares the raw materials, and in the process, various main technical indexes of the raw materials need to be analyzed and tested to ensure that the indexes meet requirements, and then the silicon-calcium-magnesium whisker is dried in an oven at 80 ℃ for 3 hours and is mixed with a coupling agent in a high-speed mixer for pretreatment for 20 minutes; then 70 percent of high-density polyethylene PE100 grade YGH041 resin, 25.1 percent of silicon-calcium-magnesium whisker, 3 percent of EVA and 1 thousandth of antioxidant are mixed in a high-speed mixer for 10 minutes; then adding the mixed materials into a hopper, starting a hopper feeder to prevent the materials from bridging, namely completing the preparation of the raw materials, then using the modified raw materials to carry out the production and processing of the pipeline, respectively putting the prepared special materials into a plate die extruder and a reinforced pipe extruder hopper in the preparation stage, and starting an anti-bridging feeding motor during the production; heating for 1 hour according to the set temperature of the process; in the starting-up stage, the plate die extruder is started first, and the material belt extruded from the plate die is wound on the plurality of cold rolling shafts; then, opening a rib pipe extruder to lead the polypropylene rib pipe into the extruded pipe blank, and winding the polypropylene rib pipe on the surface of the formed pipe to prepare the pipe with the outer surface of the spiral O-shaped rib; then entering a cooling stage, extruding the formed pipe while cooling; then, cutting is carried out to reach the specified length, and manual cutting is carried out; and finally, detection: and detecting the appearance and the specification size according to the national standard, and entering the next production procedure if the detection is qualified, wherein the step is the integral working process of the invention, and the step is repeated when the product is used next time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.