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Method for producing thermoplastic polyurethane elastic belt and traction machine special for said method

A technology of thermoplastic polyurethane and its manufacturing method, which can be applied in the direction of belts, applications, household appliances, etc., can solve the problems of no increase in stretching action, inability to stretch multiple times, and inconvenient processing, so as to save processing man-hours, process easily, good elasticity

Inactive Publication Date: 2010-04-14
余昌纮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, TPU itself has internal stress after processing, and its internal stress will not be released. If it is rolled up or retracted into the bag immediately, it will become sticky, and it will be quite inconvenient to process afterwards.
In addition, the existing production process does not increase the extension action, so the elasticity of the TPU ultra-high elastic belt cannot be fully exerted, resulting in the TPU ultra-high elastic belt, shoulder strap, and elastic belt. The finished product of the ultra-high elastic band is deformed due to the extensibility that still exists inside
[0003] The usual roller tractor is a single section, that is, a pair of roller tractors, which cannot be stretched multiple times

Method used

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  • Method for producing thermoplastic polyurethane elastic belt and traction machine special for said method
  • Method for producing thermoplastic polyurethane elastic belt and traction machine special for said method

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Embodiment Construction

[0019] see figure 1 , the manufacture method of thermoplastic polyurethane elastomer (TPU) ultra-high elastic belt of the present invention comprises the following steps: (1) the die head 1 that thermoplastic polyurethane material is extruded with extruder; (2) extruder The extruded thermoplastic polyurethane passes through the water tank 2 to cool, and (3) the cooled thermoplastic polyurethane is drawn by the roller tractor; the roller tractor has a plurality of transmission rollers 12 below, and correspondingly has a plurality of pulling rollers above. Roller for stretching. The TPU ultra-high elastic belt extruder is cooled by the water tank, and the roller tractor passed through is multi-stage (at least three sections), and the roller tractor pulls out the TPU ultra-high elastic belt through the first roller tractor roller 3 Pull it out, go to the roller 4 of the second section of the roller tractor, and stretch it. This is the first stretching and extending action. First...

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Abstract

The production process of elastic belt of thermoplastic polyurethane includes the following steps: 1. extruding out thermoplastic polyurethane from extruder; 2. cooling the extruded thermoplastic polyurethane belt in water tank; 3. drawing the cooled thermoplastic polyurethane belt with one roller traction machine in at least three stages, including the first drawing stage of forming initial widthand thickness, the second drawing stage of determining width and thickness and producing high elasticity for the first time, and the third drawing stage of setting and producing high elasticity for the second time; and 4. driving pneumatically the elastic belt of thermoplastic polyurethane into tubular tank to release stress. The traction machine for the production process includes at least threepairs of transmission rollers and drawing rollers. The produced elastic belt of thermoplastic polyurethane has high elasticity and strong resilience.

Description

technical field [0001] The invention relates to a method for manufacturing a thermoplastic polyurethane elastic band. Background technique [0002] At present, thermoplastic polyurethane elastomer (TPU) is widely used to make ultra-high elastic belts, which have good elasticity and strong recovery. The main process method is mostly extruder extrusion method: after extruding TPU plastic, pass it through the water tank, and then pull out the TPU tape through a roller tractor, then take it back into the bag or roll up the tape. In this way, TPU itself has internal stress after processing, and its internal stress will not be released. If it is immediately rolled up or retracted into the bag, it will produce stickiness, and subsequent processing will be quite inconvenient. In addition, the existing production process does not increase the extension action, so the elasticity of the TPU ultra-high elastic belt cannot be fully exerted, resulting in the TPU ultra-high elastic belt, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/14B29C47/34B29C47/08B29L29/00B29K75/00B29C48/305B29C48/355
Inventor 余昌纮吴树龙
Owner 余昌纮
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