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Multi-component shape memory wire, fiber, pipe and adhesive tape and manufacturing method thereof

A multi-component, thread-like technology for fiber processing, filament/thread forming, textiles and papermaking

Active Publication Date: 2021-12-24
NANO & ADVANCED MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the filaments and fibers in all of the above patent applications are limited to bicomponents, and they are difficult to switch freely between linear or coiled / helical shapes

Method used

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  • Multi-component shape memory wire, fiber, pipe and adhesive tape and manufacturing method thereof
  • Multi-component shape memory wire, fiber, pipe and adhesive tape and manufacturing method thereof
  • Multi-component shape memory wire, fiber, pipe and adhesive tape and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Two SMP-N components are available for multi-component wire, fiber, tube and tape. Each of the SMP-1 and SMP-2 components accounts for at least 1% by weight of the total, and the weight ratio between the SMP-1 and SMP-2 components is 1:10. Diaplex MM3520 SMP is a shape memory polymer based on polyether urethane, which can be used in SMP-1, while SMP based on polycaprolactone diol (molecular weight = 10000) is compatible with MDI (4,4'-methylene Bis (phenyl isocyanate)), BDO (1,4-butanediol) hard segment can be used for SMP-2. T r1 at 35°C, T r2 is 60°C. Stretching of multicomponent wires, fibers, tubes and tapes to 30-300% elongation at room temperature can produce elongated linear shapes, and subsequent heating to 35°C can result in coiled / helical shapes. If continuously heated above 60 °C, the shape can be recovered from the coiled / helical shape to the original linear shape.

Embodiment 2

[0049] Diaplex MM3520 SMP and polycaprolactone-based SMP were co-extruded together with a side-by-side nozzle in a weight ratio of 7:3 (controlled by a melt flow pump) for a multicomponent strand with a diameter of 1.2 mm. All granules must be dried at 104°C for 2-4 hours before processing. The barrel temperature of the extruder is 180-195°C (zone 1), 185-200°C (zone 2), 190-205°C (zone 3), and 190-200°C (zone 1). The screw speed is 180-200 rpm. Next, the extruded strands are cooled from the nozzle in cold water at 15°C without any stretching process.

[0050] refer to image 3 , the prepared multicomponent filaments have the function of temperature regulating polymorphic changes after stretching. When the elongation is at least 100%, an elongated linear shape can be produced, and subsequent heating to 40°C can result in a coiled / helical shape. If continuously heated above 60 °C, the shape can be recovered from the coiled / helical shape to the original linear shape.

Embodiment 3

[0052] For bicomponent filaments with a diameter of 1.2 mm, Diaplex MM3520 SMP and Diaplex MM6520 SMP were coextruded together with an eccentric nozzle in a weight ratio of 8:2 (controlled by a melt flow pump). All granules must be dried at 104°C for 2-4 hours before processing. The barrel temperature of the extruder is 180-195°C (zone 1), 185-200°C (zone 2), 190-205°C (zone 3), and 190-200°C (zone 1). The screw speed is 180-200 rpm. Next, the extruded filaments were cooled in cold water at 15°C from the nozzle without any stretching process.

[0053] The prepared multi-component filament has the function of temperature regulating polymorphic change after stretching. When the elongation is at least 100%, an elongated linear shape can be produced, and subsequent heating to 40°C can result in a coiled / helical shape. If continuously heated above 70 °C, the shape can be recovered from the coiled / helical shape to the original straight shape.

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Abstract

The present invention relates to a multi-component shape memory wire, fiber, tube, or tape comprising at least two shape memory polymer (SMP-N) components. Each of the at least two SMP-N components at least accounts for 1% of the total weight, and N is a positive integer starting from 1; wherein the SMP-N component has a shape recovery temperature (Tr) of from 0 DEG C to 130 DEG C; the wire, fiber, tube, or tape is configured to assume a substantially helical shape when heated to above TrN and below TrN+1 by a stimulus when the elongation of the wire, fiber, tube, or tape is from 30% to 300%; wherein, when TrN and TrN+1 are above room temperature, the diameter of each spiral coil is 0.5 to 10 mm and the number of spirals per centimeter is 5 to 30 when the multi-component shape memory wire, fiber, tube, or tape is substantially spiral.

Description

technical field [0001] The present invention generally relates to a substantially linear multicomponent thread, fiber, tube, tape and method of use thereof. Background technique [0002] Shape memory polymers (SMPs) are materials that have a first "permanent" shape and a second "temporary" shape caused by deformation of the material. After receiving external stimuli such as heat, solvents, electric current, light, magnetic fields, pH changes, and thermal stimuli, the material returns to its permanent shape. That is, the material remembers its original shape and returns to it after being exposed to an external stimulus. [0003] Shape memory filaments and fibers can be produced by melt spinning, wet spinning and dry spinning methods. In this smart fiber, the shape memory function can be well maintained, that is, the deformation can be reversible through phase memory, and the original shape can be restored when triggered by external stimuli. For example, US Patent Published...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16
CPCD01F8/16D01D5/32D01D5/34D01F8/14C08G18/7671C08G18/4277C08G18/3206C08L75/08C08L75/06C08L2201/12C08L2203/12C08L2205/025D02G3/44D01F8/04D02G3/38D02G3/045D10B2401/046
Inventor 朱勇王松韩建平刘晨敏
Owner NANO & ADVANCED MATERIALS INST