JWELL's small-diameter five-layer HDPE pipe production line: Reshaping the technological benchmark in the pipe industry

With the continuous upgrading of pipeline materials, small-diameter five-layer HDPE pipes have become the "new favorite" in fields such as gas transportation and cable protection due to their excellent performance. The core supporting their efficient production is precisely the small-diameter five-layer HDPE pipe production line. This system integrating precision machinery and intelligent controlwhat makes it exceptional? Let's explore in depth.

1.Production line structure composition

A complete small-diameter five-layer HDPE pipe production line is a "precision legion" of multi-equipment collaboration, with each link shouldering a critical mission:

Material Handling System: Comprises a vacuum feeder and four drying hoppers, responsible for precise transportation and drying of raw materials like PE, EVOH, and adhesives. This ensures material purity and stability, laying the foundation for subsequent extrusion.

Extrusion Unit: Formed by five single-screw extruders of different models as the "core of layered production"—JWS65/33 main extruder handles outer-layer PE with high output (120-150 kg/h); Two JWS35/25 extruders separately process adhesive and EVOH barrier layers (precise control at 3-8 kg/h); JWS30/28 assists in inner-layer PE extrusion; JWS25/25 specializes in producing four color marking lines (3-5 kg/h), enabling independent feeding for the five-layer structure.

Molding and Sizing System: The die (including the die head and mandrel) fuses five-layer materials into a pipe prototype. A 9-meter vacuum tank rapidly sizes the pipe via negative pressure, and a 9-meter spray tank further cools and solidifies it, ensuring dimensional accuracy (e.g., chip-free cutting accuracy ≤5 mm).

Post-processing System: A three-jaw tractor (driven by a servo motor) stably controls the production line speed (0.3-8 m/min), a chip-free cutting machine performs precise cutting, a single-station winder neatly collects materials, and a hot-melt printer (metering accuracy ±0.3%) achieves clear marking, forming a fully automated closed loop.

2.Core advantages

The reason why this production line has become the preferred choice in the industry lies in its irreplaceable technical strengths:

Multi-layer co-extrusion technology: Through the coordination of independent extruders and precision molds, "seamless bonding" of different materials such as PE, EVOH, and adhesives is achieved. The five-layer structure is formed in one step, increasing production efficiency by over 30% compared to traditional processes.Intelligent control system: Equipped with a Siemens PLC control cabinet, all parameters (rotation speed, temperature, etc.) can be set and stored. It has alarm functions for motor overload, torque exceeding the limit (automatic shutdown after 3 minutes of 105% overload), ensuring stable and controllable production throughout.High-precision guarantee: From raw material ratio (e.g., EVOH content of 5-6%) to finished product dimensions (pipe diameter 50-125mm, compatible with multiple specifications of SDR9-SDR21), and then to cutting and printing precision, the error control in the whole process is within the millimeter level, meeting strict industry standards.Flexible operation and maintenance support: Priority remote debugging services are provided. For on-site support, engineers respond quickly. The whole machine is guaranteed for 1 year, with lifetime maintenance and sufficient spare parts (such as screw disassembly tools, heating coils, etc.), reducing the risk of downtime.

3.Product structure and performance

The "hardcore strength" of small-diameter five-layer HDPE pipes originates from their scientific layered design, demonstrating significant advantages compared to traditional single-layer/three-layer pipes:

Structural Layer

Material

Proportion

Core Function

Performance Advantage Comparison

Outer Layer

 

PE100

 

90%

 

Compression resistance,wear

resistance

Impact strength increased by 20%compared to single-layer PE pipes

 

Adhesive Layer

Adhesive

1-2%

Connect outer layer

and barrier layer

Solves inter layer peeling problem of traditional pipes, sealing performance improved by 30%

Barrier Layer

EVOH

5-6%

Block gas/liquid

penetration

Penetration rate is only 1/100 of

single-layer PE pipes, safer

Adhesive Layer

 

Adhesive

1-2%

Connect barrier layer

and inner layer

Ensure structural stability ,adapt to high and low temperature

environments

Inner Layer

(Conductive

Layer)

PE conductive

material

2-3%

Anti-static,flame

retardant

Meet safety standards for gas/cable pipes, traditional pipes have no such design

In short, the five-layer structure achieves a triple upgrade of "strength + barrier + safety", with a service life of over 50 years, far exceeding the 30 years of traditional pipes.

4.Applicable industries

With its outstanding performance, the products of the small-diameter five-layer HDPE pipe production line are widely used in:

Gas transportation: The EVOH barrier layer prevents gas leakage, and the conductive layer resists static electricity, making it suitable for gas stations and municipal gas pipelines.

Cable protection: With compressive, corrosion-resistant, and flame-retardant properties, it safeguards underground cables from external damage.

Municipal/industrial sectors: Applicable to small-scale water supply networks, chemical liquid transport pipes, etc., adapting to complex working conditions.

From raw materials to finished products, and from efficiency to quality, the small-diameter five-layer HDPE pipe production line has redefined the pipeline production standards through technological innovation. Whether in the gas industry that prioritizes safety or the cable protection field that emphasizes durability, it delivers a dual guarantee of "high-efficiency production + reliable products".








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1. Controllers of Personal Information

Polynk.com, no 91320481MA215T1W6Q, is responsible for the processing of your personal data. The following is Polynk.com’s contact information: Telephone number: +86 0519 87108958, Address: Room 504, No.85 Shangshang Road, Kunlun Street, Liyang City, Jiangsu Province, China, PR (together "Polynk.com") are data controllers of personal information collected and processed through Polynk.com Services. Details can be found here.

2. What Personal Information About Customers Does Polynk.com Collect?

We collect your personal information in order to provide and continually improve our products and services.

Here are the types of personal information we collect:

.Information you give us: The personal data we process about you are your IP address, your preferences and your activities on our webpage. The cookies collecting information about use of our website collect information in an anonymous form, including the number of visitors to the website, which country the internet connection is from, which web browser and version is used and the title on the pages they visited. If you play a video on our webpage, YouTube might save cookies on your computer depending on your settings. Please review YouTube’s Privacy policy for further information. If you do not want YouTube to save cookies on your computer, do not play any videos on our webpage since YouTube operates these videos. When you accept cookies on your computer you will provide us with your information. If you do not want cookies to be saved on the computer, you can prevent this by not accepting cookies to be saved on your computer. Please note, that if you deny functional cookies the webpage will have limited function.

3. For What Purposes Does Polynk.com Process Your Personal Information?

We process your personal information to operate, provide, and improve Polynk.com that we offer our customers. These purposes include:

Purchase and delivery of products and services. We use your personal information to take and handle orders, deliver products and services, process payments, and communicate with you about orders, products and services, and promotional offers. Provide, troubleshoot, and improve Polynk.com. We use your personal information to provide functionality, analyse performance, fix errors, and improve usability and effectiveness. Recommendations and personalisation. We use your personal information to recommend features, products, and services that might be of interest to you, identify your preferences, and personalise your experience with Polynk.com. Comply with legal obligations. In certain cases, we collect and use your personal information to comply with laws. For instance, we collect from sellers information regarding place of establishment and bank account information for identity verification and other purposes. Communicate with you. We use your personal information to communicate with you in relation to Polynk.com services via different channels (e.g., by phone, email, chat). Advertising. We use your personal information to display interest-based ads for features, products, and services that might be of interest to you. Fraud prevention and credit risks. We process personal information to prevent and detect fraud and abuse in order to protect the security of our customers, Polynk.com, and others. We may also use scoring methods to assess and manage credit risks. Purposes for which we seek your consent. We may also ask for your consent to process your personal information for a specific purpose that we communicate to you. When you consent to our processing your personal information for a specified purpose, you may withdraw your consent at any time and we will stop processing of your data for that purpose.

4. What About Cookies and Other Identifiers?

We use cookies and similar tools to enhance your shopping experience, provide our services, understand how customers use our services so we can make improvements, and display ads. Approved third parties also use these tools in connection with our display of ads. To enable our systems to recognise your browser or device and to provide Polynk.com Services to you, we use cookies. For more information about cookies and how we use them, please read our Cookies Notice.

5. Does Polynk.com Share Your Personal Information?

Information about our customers is an important part of our business and we are not in the business of selling our customers' personal information to others. Polynk.com shares customers' personal information only as described below and with Polynk.com. controls that are either subject to this Privacy Notice or follow practices at least as protective as those described in this Privacy Notice.

Transactions involving third parties: We make available to you services, products, applications, or skills provided by third parties for use on or through Polynk.com Services. For example, you can order products from third parties through our stores. We also offer services or sell product lines jointly with third-party businesses. You can tell when a third party is involved in your transactions and we share customer personal information related to those transactions with that third party. Third party service providers: We employ other companies and individuals to perform functions on our behalf. Examples include fulfilling orders for products or services, delivering packages, sending postal mail and e-mail, removing repetitive information from customer lists, analysing data, providing marketing assistance, providing search results and links (including paid listings and links), processing payments, transmitting content, assessing and managing credit risk, and providing customer service. These third-party service providers have access to personal information needed to perform their functions, but may not use it for other purposes. Further, they must process the personal information in accordance with this Privacy Notice and as permitted by applicable data protection laws. Business transfers: As we continue to develop our business, we might sell or buy other businesses or services. In such transactions, customer information generally is one of the transferred business assets but remains subject to the promises made in any pre-existing Privacy Notice (unless, of course, the customer consents otherwise). Also, in the unlikely event that Polynk.com. or substantially all of its assets are acquired, customer information will of course be one of the transferred assets. Protection of Polynk.com: We release account and other personal information when we believe release is appropriate to comply with the law; enforce or apply our Conditions of Use and other agreements; or protect the rights, property or safety of Polynk.com, our users or others. This includes exchanging information with other companies and organisations for fraud protection and credit risk reduction. Other than as set out above, you will receive notice when personal information about you might be shared with third parties and you will have an opportunity to choose not to share the information.

Transfers out of the European Economic Area and the UK. Whenever we transfer personal information to countries outside of the European Economic Area or the UK, we ensure that the information is transferred in accordance with this Privacy Notice and as permitted by the applicable laws on data protection. We rely on European Commission adequacy decisions or use contracts with standard safeguards published by the European Commission and similar measures under UK laws for such transfers.

6. How Secure is Information About Me?

We design our systems with your security and privacy in mind.

We work to protect the security of your personal information during transmission by using encryption protocols and software. We follow the Payment Card Industry Data Security Standard (PCI DSS) when handling credit card data. We maintain physical, electronic and procedural safeguards in connection with the collection, storage and disclosure of personal customer information. Our security procedures mean that we may ask you to verify your identity before we disclose personal information to you. Our devices offer security features to protect them against unauthorised access and loss of data. You can control these features and configure them based on your needs. It is important for you to protect against unauthorised access to your password and to your computers, devices, and applications. We recommend using a unique password for your Polynk account that is not utilized for other online accounts. Be sure to sign off when you finish using a shared computer.

7. What About Advertising?

Third-party advertisers and links to other websites: Polynk.com Services may include third-party advertising and links to other websites. Third party advertising partners may collect information about you when you interact with their content, advertising, and services. Use of third-party advertising services: We provide ad companies with information that allows them to serve you with more useful and relevant Polynk.com ads and to measure their effectiveness. We never share your name or other information that directly identifies you when we do this.

8. What Information Can I Access?

You can access your information, including your name, address, payment options, profile information, membership, and purchase history in the "My Polynk" section of the website.

9. How Long Do We Keep Your Personal Information?

Your personal data will be sorted out/erased according to the following: Functional cookies will be erased when the web browser is closed. Preference cookies will be erased after 100 days. Analytic cookies will be erased after two years.

10. What rights do I have?

Right to access to your personal data  You are entitled to request information about which personal data we process about you and how the personal data is being processed. You also have the right to request a copy of the personal data we process about you. Right to rectification If you consider your personal data that Polynk.com process to be inaccurate, e.g. information concerning your name or address, you have the right to get the inaccurate information corrected and to get the incomplete information completed by providing us with the correct information. Right to erasure You have the right to request that your personal data is erased, e.g. if the processing is no longer relevant in relation to the purpose the information was collected for or if you recall your consent to the processing and there are no other legal ground for the process. Right to limitation of processing You have the right to request limitation of the processing of your personal data, with the exception for storage. Limitation of processing can be requested for example if you object to the accuracy of the personal data or if you consider the processing of your personal data to be unlawful. Right to objection   You have the right to object at any time concerning the processing of your personal data in accordance with article 6.1 (e) or (f) (legitimate interest) GDPR, including profiling based on those provisions. Where personal data are processed for direct marketing purposes, you have the right to object at any time to processing of personal data concerning such marketing, which includes profiling to the extent that it is related to such direct marketing.  Right to data portability  You have the right to obtain the personal data you have provided us with in a structured, commonly used and machine-readable format and have these transmitted to another controller, provided that the process is automatized and that the process is based on a consent or an agreement.  

11. EU General Data Protection Regulation and UK Data Protection Laws - Legal Basis

The EU GDPR and UK data protection laws require a legal basis for our use of personal information. Our basis varies depending on the specific purpose for which we use personal information. We use:

Performance of a contract when we provide you with products or services, or communicate with you about them. This includes when we use your personal information to take and handle orders, deliver products and services, and process payments.

Our legitimate business interests and the interests of our customers when we improve Polynk.om services (including when we use your voice, video, or camera input to improve services), when we detect and prevent fraud and abuse in order to protect the security of our customers, ourselves, or others, and when we provide you with interest-based advertising.

Your consent when we ask for your consent to process your personal information for a specific purpose that we communicate to you. When you consent to our processing your personal information for a specified purpose, you may withdraw your consent at any time and we will stop processing of your data for that purpose.

Compliance with a legal obligation when we use your personal information to comply with laws. For instance, we collect seller place of establishment and bank account information for identity verification purposes.

These and other legal bases depending on the purpose for which we use personal information.

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Why do we have a privacy policy? 

Polynk.com (“we”) care about your privacy. Therefore, we always strive to protect your personal data in the best possible way and to comply with all applicable laws and regulations for the protection of personal data. In this policy, we want to inform you about how we collect and process your personal data in accordance with the EU regulation 2016/679 (“GDPR”) to guarantee an open and transparent processing of your personal data.

Who is responsible for your personal data?

Polynk.com, no 91320481MA215T1W6Q, is responsible for the processing of your personal data. The following is Polynk.com’s contact information: Telephone number: +86 0519 87108958 Address: Room 504, No.85 Shangshang Road, Kunlun Street, Liyang City, Jiangsu Province, China, PR

What personal data do we process? 

Polynk.com process information about you when you use Polynk.com’s webpage by saving cookies on your computer. The personal data we process about you are your IP address, your preferences and your activities on our webpage. The cookies collecting information about use of our website collect information in an anonymous form, including the number of visitors to the website, which country the internet connection is from, which web browser and version is used and the title on the pages they visited. If you play a video on our webpage, YouTube might save cookies on your computer depending on your settings. Please review YouTube’s Privacy policy for further information. If you do not want YouTube to save cookies on your computer, do not play any videos on our webpage since YouTube operates these videos. When you accept cookies on your computer you will provide us with your information. If you do not want cookies to be saved on the computer, you can prevent this by not accepting cookies to be saved on your computer. Please note, that if you deny functional cookies the webpage will have limited function.

For what purpose do we process your personal data? 

We process your personal data to be able to offer a functional webpage. These functional cookies are essential for your use of the webpage’s features. We also process information about your activities on our webpage over time for non-advertising purposes such as improving the site functionality, the website experience and to improve the website. We also process your personal data to help us remember your preferences such as language or location to create a better experience when visiting the webpage. Who has access to your personal data.  As a starting point, your personal data will only be processed by Polynk.com. Our IT suppliers might get access to the personal data and other information when developing and supporting our IT system. These IT supporters only process personal data on our behalf and never on their own behalf.

On what legal ground do we process your personal data? 

The legal ground for Polynk.com’s processing of your personal data by saving cookies on your computer is Polynk.com’s legitimate interest under, under article 6.1 (f) GDPR, to process your personal data in order allow you to navigate the site, use our features and for us to remember your preferences (functional and preference cookies). Analytic cookies are processed so that we can improve the webpage’s functionality and the website experience. You can always deny these cookies if you do not want us to save these on your computer.  

For how long will we process and store your personal data? 

Your personal data will be sorted out/erased according to the following: Functional cookies will be erased when the web browser is closed. Preference cookies will be erased after 100 days. Analytic cookies will be erased after two years.  

Transfer of personal data to third countries 

As a general principle, Polynk.com only processes your personal data within the EU/EEA. If your personal data would processed outside the EU/EEA, then we will make sure that such processing is either based on a decision from the Commission establishing that the country in question ensures an adequate level of protection or appropriate safeguards that ensure that your rights are protected or based on another ground for such transfer in accordance with GDPR.

Your rights 

Right to access to your personal data 

You are entitled to request information about which personal data we process about you and how the personal data is being processed. You also have the right to request a copy of the personal data we process about you.

Right to rectification

If you consider your personal data that Polynk.com process to be inaccurate, e.g. information concerning your name or address, you have the right to get the inaccurate information corrected and to get the incomplete information completed by providing us with the correct information.

Right to erasure

You have the right to request that your personal data is erased, e.g. if the processing is no longer relevant in relation to the purpose the information was collected for or if you recall your consent to the processing and there are no other legal ground for the process.

Right to limitation of processing

You have the right to request limitation of the processing of your personal data, with the exception for storage. Limitation of processing can be requested for example if you object to the accuracy of the personal data or if you consider the processing of your personal data to be unlawful.

Right to objection  

You have the right to object at any time concerning the processing of your personal data in accordance with article 6.1 (e) or (f) (legitimate interest) GDPR, including profiling based on those provisions. Where personal data are processed for direct marketing purposes, you have the right to object at any time to processing of personal data concerning such marketing, which includes profiling to the extent that it is related to such direct marketing. 

Right to data portability 

You have the right to obtain the personal data you have provided us with in a structured, commonly used and machine-readable format and have these transmitted to another controller, provided that the process is automatized and that the process is based on a consent or an agreement.  

Changes in this policy 

Polynk.com is entitled to amend this policy at any time if it is necessary to fulfill the requirements according to applicable laws and regulations or if it is necessary due to changes in Polynk.com operations.  In such a situation, Polynk.com will provide information concerning the changes according to applicable law. Applicable information will be available in this privacy policy, on the website of Polynk.com and/or provided in other appropriate ways.

Observance of GDPR

Do not hesitate to contact Polynk.com if you, for any reason, feel unhappy about our processing of your personal data. If you would still be of the opinion that your rights, according to GDPR, have not been satisfied you have the right to send a complaint to the regulatory authority. You will find more information concerning this on www.datainspektionen.se

Our contact details 

If you would like to contact us concerning our processing of your personal data or if you have questions concerning this privacy policy, you are welcome to contact us on gfy@polynk.com. Copyright (©) 2021 Polynk.com