Wide-Neck Plastic Container Neck Structure for Stable Reuse Sealing
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Solution Overview
Problem
Existing glass containers for non-liquid, flowable goods face issues such as large dimensional tolerances, health risks from plasticizers, high energy consumption, and susceptibility to deformation and cracking, leading to contamination and increased production downtime.
Innovation Solution
A reusable wide-necked container made of plastics material with a thickened neck and body walls, featuring a peripheral groove to decouple the neck from the body, multi-start threads for uniform force distribution, and a precise seal design to minimize deformation and enhance sealing, while using safer materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If glass containers are used for reusable packaging, then the containers can be reused multiple times, but the containers are heavy and require high energy for heating and transportation
Solution Approach 1:
The patent changes the material parameter from glass to plastics, specifically using polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) with optimized wall thickness (0.5-1.5mm). This material substitution maintains reusability while dramatically reducing weight and energy requirements for heating and transportation.
2Duration of action of stationary object
If glass containers are used, then the containers can be reused, but the dimensional tolerances are large leading to poor sealing
Solution Approach 1:
The patent changes the material from glass to plastics, which inherently provides better dimensional precision and stability. The plastic containers are manufactured with controlled wall thickness (0.5-1.5mm) that maintains consistency across production batches, enabling reliable sealing without requiring excessive seal thickness.
3Reliability
If soft PVC seal with orthophthalates is used, then the sealing is effective, but harmful substances are released into the contents
Solution Approach 1:
The patent changes the seal material composition by eliminating orthophthalate plasticizers and using alternative plasticizers or master batches that do not harm food safety. The seal maintains its sealing function while removing the harmful chemical substances that could leach into the container contents.
Solution Approach 2:
The patent employs composite sealing systems combining the plastic container wall with specialized sealing compounds that are free from harmful orthophthalates. The sealing layer is formulated with safe alternative materials that provide effective sealing without compromising food safety.
4Duration of action of stationary object
If glass containers are used, then the containers can be reused, but the containers are susceptible to deformation and cracking under force
Solution Approach 1:
The patent changes the material from glass to plastics with optimized wall thickness (0.5-1.5mm). This material parameter change provides superior toughness and resistance to deformation and cracking, allowing the container to withstand handling forces and temperature changes without breaking.
Solution Approach 2:
The patent uses composite construction with reinforced plastic materials that combine flexibility and strength. The container wall structure is designed with optimized thickness distribution to resist deformation and cracking while maintaining light weight and reusability.
5Duration of action of stationary object
If glass containers are used, then the containers can be reused, but high temperatures are required for washing and filling leading to high energy consumption
Solution Approach 1:
The patent changes the material from glass to plastics, which have lower thermal conductivity and lower temperature requirements for cleaning and filling. This allows the use of lower temperatures (below 30°C for washing, below 50°C for filling) while maintaining hygiene and safety, dramatically reducing energy consumption for heating.
Data Source
AI summary
A reusable wide-necked container made of plastic, in particular for non-liquid, flowable filling material. The reusable wide-necked container comprises a container base, a container body and a neck. The neck has a neck section ending in an outlet opening and adjoining a container shoulder. The neck section has an inner wall and an outer wall. Securing means for securing a cover are arranged on the outer wall. The container body has an average wall thickness that is greater than 0.5 mm, in particular greater than 0.7 mm, and smaller than 1.2 mm. The neck section has a wall thickness that is greater than 1.5 mm. The neck section has a peripheral groove at the transition to the container shoulder. Also described is a packaging unit comprising a reusable wide-necked container.