News_News_Mengzhou Lianguan Plastic Co., Ltd.

0086-391-8571396

foreign@mzlggs.com

搜索



Home
About 
Company Profile Company Culture Organization Qualification Honor Factory Show Corporate Video
Product 
Bottle Cap Preform
Service 
Technology Patent Service Support Partner Common Problem
News 
Company News Industry News Download
Recruitment 
Job Offers Employing Concept Employee Activity
Contact 
Contact Us Online Message
CN/RU 
CN RU

NEWS

Current Position：

Homepage

News

How can you determine the material of a plastic bottle cap?

Mengzhou Lianguan Plastic Co., Ltd. is a company specializing in the manufacturing of plastic products, established in September 2006, with many years of industry experience. Here's how to quickly identify the material of plastic bottle caps to use them more safely. The material of a plastic bottle cap directly affects safety and compatibility. For example, food-contact scenarios require non-toxic materials, while high-temperature environments need heat-resistant types. Learning how to identify the materials can help us avoid hazards and choose the right products. Look at the markings: This is the most reliable method. Material abbreviations are often printed on the bottom or inside of the cap. Common food-grade materials include PP (polypropylene) and HDPE (high-density polyethylene), accompanied by a recycling triangle symbol (5 = PP, 2 = HDPE). Food-grade caps must be labeled “for food contact” and may also indicate certifications like GB 4806 or FDA. The sealing ring may specify silicone, TPE, or PE. Feel the texture: PP caps are hard, tough, and elastic; they bounce back quickly when pressed, have a smooth surface, and good heat resistance. HDPE caps are more flexible, slightly rough on the surface, and can recover after deformation. High-quality sealing rings (silicone/TPE) are elastic and odorless, while low-quality rings can become hard, sticky, or have a pungent smell. Consider the scenario: Tamper-evident caps on beverage bottles are mostly HDPE (leak-proof, suitable for single use); sauce bottles and drink cup lids (which require repeated opening and high temperature resistance) are mostly PP; baby bottles and space cup lids often use PP with silicone rings (safe, BPA-free, and sterilization-resistant). Small tips: Prefer bottle caps made of PP/HDPE with silicone/TPE sealing rings and ensure they have food-contact certification. Avoid low-quality products that are grayish, brittle when pinched, or have an unusual smell. Choose precisely based on usage scenarios (room temperature/high temperature, single use/reusable) for safer use.

2025-12-03

Welfare Trip: Accompanying with Heart, Journeying Together to Vietnam

To express gratitude for the hard work of all employees and foster a warm and harmonious corporate atmosphere, Lianguan Plastics carefully organized a unique employee welfare trip to Vietnam in November. This event was open to all employees, aiming to allow everyone to relax and unwind amid busy work schedules through experiencing foreign landscapes and interactive team activities, while also feeling the company's care and appreciation for its employees, further enhancing team cohesion and a sense of belonging. In front of the ancient Tea Cathedral, employees stopped to admire the white marble sculptures depicting the story of Jesus, experiencing the historical marks left from the French colonial period. The colorful buildings of the European-style town Megagrandworld became a popular photo spot, where everyone enjoyed authentic Vietnamese coffee and captured memorable moments. On Chagu Beach, employees strolled along the 'northernmost, longest, and most pristine' silver-white sandy beach of Vietnam, feeling the gentle sea breeze and enjoying the unique view of the distant Dongxing Wanwei Golden Beach across the sea, while marking the iconic starting point of the zero-kilometer highway. Ha Long Bay, known as the 'Guilin on the sea,' is a visual feast, with over 3,600 karst mountains rising from the waters. Employees took boat trips to explore sights such as Dog Slobber Mountain and Incense Burner Mountain, ascended Paradise Island for panoramic views, discovered the Moon Lake’s enclosed bay, and marveled at the fantastic stalactites of Surprise Cave, fully immersing themselves in the world natural heritage's charm of 'beautiful seas, serene mountains, and incredible caves.' The itinerary also featured a diverse array of local foods. In Nanning, specialties such as Laoyou rice noodles and lemon duck whet the appetite. In Vietnam, employees indulged in fresh and fragrant pho, aromatic tile-grilled BBQ, and sumptuous seafood dinner after dinner, along with sharing traditional snacks like mung bean cakes and coconut candies, each bite offering authentic flavors. Throughout the trip, employees maintained a positive and energetic spirit, demonstrating excellent teamwork skills. During team-building activities, everyone helped each other and coordinated smoothly to complete challenges together, deepening mutual understanding and trust. Whether it was the bright smiles in photos at scenic spots or the sincere exchanges during sharing sessions, it fully reflected the unity, friendship, and enterprising spirit of Lianguan Plastics employees. Many employees expressed that this trip not only allowed them to enjoy beautiful scenery but also make them feel the warmth of the company as a big family, motivating them to approach future work with even greater enthusiasm. This Vietnam employee welfare trip was not only a journey for relaxation but also a profound practice of corporate culture. The company always adheres to a 'people-oriented' development philosophy, viewing employees as the most valuable asset, and continuously enhancing their sense of happiness and belonging through diverse welfare activities. In a foreign land, employees personally felt the company's thoughtfulness and care, gaining a deeper understanding of the essence of a 'family culture.' Everyone stated that they would take this trip as a new starting point, working together in the future and contributing more power to the company's development, jointly envisioning a brighter future for Lianguan Plastics. The successful conclusion of the Vietnam employee welfare trip marks not only a summary but also a new beginning. Lian Guan Plastics will continue to uphold its care and commitment to employees, continuously improving the employee welfare system and creating more opportunities for their growth and development. We believe that with the joint efforts of all employees, the company will forge ahead on the path ahead, writing more brilliant chapters, allowing every employee to realize their own value in this warm family and grow together with the company to share the joy of success.

2025-11-19

The raw material characteristics of bottle preforms: The performance of PET resin directly affects the molding adaptability

When the error of the pressure sensor exceeds ± 2MPa, the injection/holding pressure control is inaccurate, and the size of the preform fluctuates greatly.

2025-11-10

Preform process parameters: directly affect molding stability and preform quality

The matching of injection molding process parameters is the "core variable" of preform molding, which mainly includes three categories: temperature, pressure, and time:

2025-10-30

Mold design of preforms: determine the basic structure and accuracy of preforms

The mold is the "mother" of preform molding, and its structural design directly affects the dimensional stability, cooling efficiency and release effect of the preform, and the core influencing factors include:

2025-10-27

What should I pay attention to when designing preform molds?

The design of cavity (determining the outer diameter and appearance of the preform) and core (determining the inner diameter and wall thickness of the preform) should be combined with the characteristics of PET material and the rules of the molding process to avoid precision deviations in subsequent processing and use due to design defects.

2025-10-23

How to optimize the cavity and core accuracy of preform molds?

Optimizing the cavity and core accuracy of preform molds is the core link to improve the consistency of preform dimensions and ensure the quality of subsequent blowing (such as uniform wall thickness and sealing standards). It is necessary to establish a full-process control system from the four dimensions of design specifications, processing technology, accuracy testing, and post-maintenance.

2025-10-20

How to extend the precision life of preform molds?

In long-term use, the accuracy of the mold will decrease due to wear and corrosion, and it is necessary to establish a regular maintenance mechanism to maintain the accuracy and stability of the cavity and core.

2025-10-16