Hold-Up Stocking Grip Region Using Bare Elastomer Yarn Knitting
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Solution Overview
Problem
Existing methods for manufacturing hold-up stockings with grip regions, such as elastic bands or silicone strips, often result in insufficient grip and increased production costs, and existing technologies like bare elastomer yarns or high-friction elastic yarns do not achieve a fully satisfactory self-supporting effect.
Innovation Solution
A method using a circular hosiery knitting machine with electronic needle selection to create floating portions or bridles of bare elastomer yarn on the reverse side of the article, which are knitted in with other yarns to form a grip region, allowing for improved grip without structural modifications to the machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an elastic band is knitted as a double welt to grip the thigh, then the structure is simple and production cost is low, but the grip is insufficient and the band slips downward
Solution Approach 1:
The invention applies different yarn types in different regions of the stocking. Bare elastomer yarns are used specifically in the grip region at the upper end, while other regions use conventional yarns. This localized application of high-friction material provides enhanced grip where needed without increasing complexity or cost throughout the entire article.
Solution Approach 2:
The invention combines bare elastomer yarns with other yarns to create a composite knitting structure. The bare elastomer yarns protrude from the knit fabric surface, creating a composite material system that integrates high-friction properties into the grip region while maintaining the overall structure of the stocking.
2Reliability
If silicone strips are applied to the inner side of the elastic band, then the adhesion to skin is increased, but the production cost significantly increases
Solution Approach 1:
The invention replaces expensive silicone strips with a more economical solution: bare elastomer yarns that are knitted directly into the stocking structure. These yarns provide the necessary friction and adhesion properties through their surface characteristics and knitting pattern, eliminating the need for additional silicone applications and associated costs.
Solution Approach 2:
The invention merges the grip-enhancing function with the structural knitting process itself. The bare elastomer yarns are integrated into the knit fabric during manufacturing, combining the structural support function with the high-friction grip function in a single integrated component, rather than adding separate silicone strips as an additional layer.
3Reliability
If bare elastomer yarns are knitted to protrude from the stocking, then the grip effect is improved, but the machine structure requires modification
Solution Approach 1:
The invention utilizes the existing electronic needle selection capability of conventional circular hosiery knitting machines to achieve the grip effect. The electronic selection system, already present in modern machines for pattern knitting, is programmed to control specific needles to knit with bare elastomer yarns that protrude from the fabric, providing the grip function without requiring structural machine modifications.
Solution Approach 2:
The invention achieves the protruding bare elastomer yarn effect by changing the knitting parameters and needle selection patterns rather than modifying machine hardware. By programming the electronic needle selection to activate specific needles at specific positions, the machine produces the desired grip region pattern using its existing multi-functionality.
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 method provides a more effective grip for hold-up stockings, preventing roll-up and descent, while maintaining competitive production costs and ensuring the articles are comfortable to wear.
Implementation Method 1
floating portions or bridles of bare elastomer yarn which protrude on the reverse side of the article and are knitted in with the other yarns that compose the article
Implementation Method 2
protrude on the reverse side of the article and are knitted in with the other yarns that compose the article
Data Source
Figure 1~2
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AI summary
A method for manufacturing tubular articles (1) provided with a grip region on their reverse side, particularly for providing hold-up stockings, by way of circular hosiery knitting machines, and a tubular article (1) obtained with the method, comprising the use of a circular hosiery knitting machine that has at least two feeds or drops, of which at least one first feed is capable of dispensing a bare elastomer yarn (3). According to the method of the invention, at the first feed, at least one needle of at least one group of contiguous needles is moved to a "tuck" position or to a "drop" position knit in order to pick up the bare elastomer yarn (3) while the other needles of the group of needles are held in or moved to the "miss" position and therefore excluded from picking up the bare elastomer yarn (3), and the needles of the group of needles are actuated at at least one subsequent feed in order to pick up the yarn or yarns dispensed at such subsequent feed and form knitting at least with the needles that were held in the "miss" position at the first feed.