One-Piece PET Container with Shoulder Grip Pillars
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Solution Overview
Problem
Current PET plastic containers lack a integrated gripping mechanism that enhances structural integrity and user handling while maintaining clarity and crystallinity, which is desirable for packaging commodities like juice bottles.
Innovation Solution
A one-piece plastic container design featuring a shoulder region with integrally formed grip portions defined by pillars and arched inset walls, providing a mid-body grip panel area that enhances structural support and consumer handling, while maintaining biaxial molecular orientation for clarity and crystallinity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional smooth container design is used, then the container maintains clarity and structural simplicity, but the container lacks integrated gripping mechanism and user handling convenience
Solution Approach 1:
The container body is segmented into distinct functional zones: smooth upper portion for clarity, shoulder region with grip portions for handling, and lower body for structural support. This segmentation allows each zone to optimize its specific function without compromising overall simplicity
Solution Approach 2:
The grip portions are merged integrally with the container body through the shoulder region, eliminating the need for separate handles or attachments. The pillars and arched inset walls are formed as one piece with the container, providing gripping functionality while maintaining structural unity
2Ease of operation
If grip portions are added to the container, then user handling convenience is improved, but the container may experience deformation under stress
Solution Approach 1:
The shoulder region is designed with localized structural features (pillars and arched inset walls) that concentrate strength where gripping forces are applied. The pillars extend vertically to distribute loads, while the arched inset walls provide local rigidity at the grip contact points without affecting the overall container strength
Solution Approach 2:
The arched inset walls incorporate curved geometries that naturally distribute stress more evenly compared to sharp angles. The arch shape in the grip portions helps deflect applied forces along the curved path, reducing stress concentration and preventing deformation
3Strength
If thermal processing is applied to increase crystallinity, then the container achieves higher structural integrity, but the container becomes opaque and loses clarity
Solution Approach 1:
The container is divided into different crystallinity zones: the upper smooth portion maintains lower crystallinity for clarity, while the shoulder region and lower body have higher crystallinity for strength. This segmentation allows optical and structural properties to be optimized in different regions independently
Solution Approach 2:
Thermal processing is applied selectively to specific regions of the container. The shoulder region receives controlled heat treatment to develop crystalline structure for grip strength, while the upper portion remains less processed to maintain amorphous transparency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design provides improved structural integrity, resistance to deformation, and ease of handling, allowing for faster filling and better stability during hot fill processes without compromising the clarity and crystallinity of the PET material.
Implementation Method 1
The combination promotes what manufacturers define as biaxial orientation of the molecular structure in the container
Implementation Method 2
Thermal processing involves heating the material (either amorphous or semi-crystalline) to promote crystal growth
Implementation Method 3
The thermal processing of an oriented PET container, which is known as heat setting, typically includes blow molding a PET preform against a mold heated to a temperature of approximately 250° F.-350° F.
Implementation Method 4
Mechanical processing involves orienting the amorphous material to achieve strain hardening. This processing commonly involves stretching an injection molded PET preform along a longitudinal axis and expanding the PET preform along a transverse or radial axis
Data Source
AI summary
The present disclosure provides a one-piece plastic container having a body defining a generally rectangular horizontal cross-section, and including a first pair of opposing sidewalls and a second pair of opposing sidewalls. The body has an upper portion, a shoulder region, a sidewall portion and a base. The shoulder region is integrally formed with and extends from the upper portion to the sidewall portion. The base closes off an end of the container. The shoulder region defines a pair of grip portions defined in part by a respective pair of pillars. Each pillar defines oppositely facing walls that are offset inboard relative to the respective second pair of opposing sidewalls.