Wet Fabric Pre-Shrinking Using Hydro-Sizer Compression Before Drying
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Solution Overview
Problem
Current methods for pre-shrinking fabrics, particularly 100% cotton and cotton/synthetic blends, fail to meet stringent shrinkage standards without using objectionable chemical resins or mechanical compaction, which are costly and pose health concerns, and existing innovations do not address pre-shrinking wet fabrics prior to drying.
Innovation Solution
An apparatus and method involving a balloon extractor station to remove excess water and a hydro-sizer compression station to compress the fabric lengthwise before drying, increasing stitches per inch and reorienting the knit construction to reduce residual shrinkage, comprising a series of stations including an entry system, knit washer, twin balloon pad, and folding station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chemical fixation with resins is used to reduce fabric shrinkage, then shrinkage standards are met, but health concerns and cost increase
Solution Approach 1:
The patent removes harmful chemical resins from the fabric treatment process entirely, replacing them with a mechanical compaction system that physically compresses the fabric structure to achieve shrinkage control without introducing harmful substances
Solution Approach 2:
The invention replaces the chemical fixation method with a mechanical compaction system using rollers and pressure application to achieve the same shrinkage control objective through physical means rather than chemical treatment
2Manufacturing precision
If fabric is compacted in dry condition, then shrinkage is reduced, but shine and shade changes occur in the fabric
Solution Approach 1:
The patent changes the moisture parameter of the fabric during compaction, treating it in a slightly damp relaxed state rather than completely dry condition, which prevents the optical defects of shine and shade changes while still achieving effective shrinkage control
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
This approach effectively pre-shrinks wet fabrics, reducing final dry compacting requirements, minimizing shine and shade changes, and achieving low residual shrinkage, thus meeting stringent shrinkage standards without chemical fixation, enhancing fabric stability and productivity.
Implementation Method 1
a balloon extractor station to remove excess water
Implementation Method 2
a hydro-sizer compression station to compress the fabric lengthwise before drying, increasing stitches per inch
Data Source
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AI summary
An apparatus and method for pre-shrinking a wet fabric prior to drying. The apparatus includes, among other components, a balloon extractor station and a hydro-sizer compression station. The balloon extractor station removes some water from the wet fabric. The hydro-sizer compression station is operatively connected to, and disposed downstream of, the balloon extractor station, and compresses the wet fabric in a lengthwise direction, and in so doing, pre-shrinks the wet fabric prior to drying. The method includes, among other steps, extracting some water from the wet fabric so as to form a hydro-extracted and wet fabric, compressing lengthwise the hydro-extracted and wet fabric so as to form a compacted and wet fabric that is now pre-shrunk prior to drying, and drying the compacted and wet fabric so as to form a compacted and dry fabric.