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Elastic casting film and preparation method thereof

An elastic film and cast film technology, applied in the field of cast film, can solve the problems of inability to meet consumer needs, hidden dangers of safety and health, and increased body space, and achieve good processing stability, rapid injection moldability, skin soft effect

Inactive Publication Date: 2019-09-06
娜菲鼎新(广东)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, the user excretes urine, and the polymer in the core of the diaper continuously reacts with it, so that the liquid substance solidifies into a solid substance. As the excreted volume increases, the volume and weight of the solid substance after the reaction It also increases accordingly, forming a falling force under the action of gravity, so that the space between the core body and the user's body position continues to increase. If the liquid is discharged again, it will splash to both sides of the user's thighs, which poses a great safety and health hazard.
[0004] In terms of the safety and sanitation of pants-type product design, the liquid substance is the carrier for all bacteria and fungi to multiply. If it remains on the user's skin surface for a long time, symptoms such as skin redness and allergies will appear. There are great hidden dangers and cannot be satisfied. Growing Consumer Demand

Method used

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  • Elastic casting film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a cast elastic film, the cast film has a single-layer structure from top to bottom, and the elastic cast film is formed by a single-layer cast extrusion manufacturing method; figure 1 The flow chart of the preparation method of the cast film provided by the present invention, the preparation method specifically includes the following steps:

[0023] S1: Feed the polyester thermoplastic polyurethane elastomer material into the screw extruder, melt it into a fluid at a temperature of 50~200°C, and then extrude it through a die to form a cast film;

[0024] S2: Stretch and transfer the cast film obtained in S1, and cool and press the material to shape at a temperature of 15-35°C;

[0025] S3: Rewinding, cutting, and packaging the surface of the material obtained in S2 to obtain the cast elastic film;

[0026] Wherein, in S1, the temperature of the die head is 140-200°C.

[0027] The thickness of the casting film is 5um.

Embodiment 1-1

[0029] A method for preparing a cast elastic film, the cast film has a single-layer structure from top to bottom, and adopts an elastic cast film formed by a single-layer cast extrusion manufacturing method; the preparation method specifically includes the following steps:

[0030] S1: The polyester thermoplastic polyurethane elastomer material is fed into the screw extruder, melted into a fluid at a temperature of 160°C, and then extruded through a die to form a cast film;

[0031] S2: Stretch and transfer the cast film obtained in S1, and cool and press the material to shape at a temperature of 25°C;

[0032] S3: Rewinding, cutting, and packaging the surface of the material obtained in S2 to obtain the cast elastic film;

[0033] Wherein, in S1, the temperature of the die is 180°C.

[0034] The thickness of the casting film is 5um.

Embodiment 1-2

[0036] A method for preparing a cast elastic film, the cast film has a single-layer structure from top to bottom, and adopts an elastic cast film formed by a single-layer cast extrusion manufacturing method; the preparation method specifically includes the following steps:

[0037] S1: The polyester thermoplastic polyurethane elastomer material is fed into the screw extruder, melted into a fluid at a temperature of 50°C, and then extruded through a die to form a cast film;

[0038] S2: Stretch and transfer the cast film obtained in S1, and cool and press the material to shape at a temperature of 35°C;

[0039] S3: Rewinding, cutting, and packaging the surface of the material obtained in S2 to obtain the cast elastic film;

[0040] Wherein, in S1, the temperature of the die is 140°C.

[0041] The thickness of the casting film is 5um.

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Abstract

The invention discloses an elastic casting film. The elastic casting film is composed of 100% of polyester-type thermoplastic polyurethane elastomers and has excellent mechanical properties, good processing stability and quick injection molding formation performance. The elastic casting film has the following advantages that the original retractable elasticity can be improved, the original productshape can be maintained, and after retractable stretching, deformation is small without the function of external force under the static condition; the plasticity of the thin film is high, and moldingcan be conducted according to the shape of a final product; the elastic casting film can be applied to supplies, such as disposable hygiene products, garment supplies and disposable face masks, witha function of stretching a rebound demand structure, the demand for an original high-stretching and small-retraction-deformation structure is met, the safety and structural performance of the productare improved, the daily-increased demand of consumers for safe and fit products with soft skin feeling is met, and the elastic casting film can be applied to disposable pants-type hygiene products, elastic waistlines, outdoor jackets, protection garments and disposable face mask products.

Description

technical field [0001] The invention relates to the technical field of casting films, in particular to a casting elastic film and a preparation method thereof. Background technique [0002] With the development of the economy and the improvement of living standards, people's consumption demand for hygiene products is increasing. At the same time, as the concept of consumption becomes more mature and open, consumers hope to use products that are safer, more comfortable and more beautiful. [0003] Disposable hygienic products such as baby diapers use elastic waistbands and non-woven composite films bonded to each other in their structure. Among them, the elastic waistband plays the role of wearing fixation, the non-woven composite film plays the role of sanitary protection, and the polymer core plays the role of absorbing liquid. During use, the user excretes urine, and the polymer in the core of the diaper continuously reacts with it, so that the liquid substance solidifie...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08J5/18A61F13/15A61L15/26A61L15/42
CPCA61F13/15577A61L15/26A61L15/42C08J5/18C08J2375/06C08L75/06
Inventor 李剑
Owner 娜菲鼎新(广东)科技有限公司
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