Packaging film for multilayer co-extruding urine bag and production method thereof

A multi-layer co-extrusion and packaging film technology, applied in the field of packaging film, can solve the problems of dioxin environmental impact, poor barrier property, building erosion, etc., to expand the heat sealing temperature range, improve stress cracking resistance, and excellent cold resistance performance effect

Inactive Publication Date: 2012-03-14
SUZHOU HAISHUN PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) PVC film contains polyvinyl chloride monomer, which is not conducive to human health
[0004] (2) In the production process of PVC film, plasticizer (DEHP) is added to change its performance. During its use, DEHP may be dissolved. DEHP is a harmful substance and can release estrogen. Exposure to DEHP may lead to reproductive system development Bad, seriously endangering human health
[0005] (3) During the storage of urine packaged in PVC film, the urine may react with the PVC film, resulting in inaccurate urine analysis of the patient
[0006] (4) The permeability of PVC film to water vapor is extremely large, and the barrier property is very poor
[0007] (5) After the PVC film is burned, it will form hydrochloric acid, which will cause respiratory damage to humans and animals and erosion of buildings. In addition, it is easy to produce dioxins when burned, which will have a profound impact on the environment.
[0008] Due to the many safety and environmental protection problems of PVC urine bag film, the market share is extremely low, and it cannot meet people's needs in health care and treatment.

Method used

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  • Packaging film for multilayer co-extruding urine bag and production method thereof
  • Packaging film for multilayer co-extruding urine bag and production method thereof
  • Packaging film for multilayer co-extruding urine bag and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 As shown, a packaging film for a multi-layer co-extruded urine bag includes a three-layer structure of a heat-sealing layer 1, a core layer 2 and a weather-resistant layer 3 arranged in sequence.

[0029] Further, a mixture of ethylene-vinyl acetate copolymer (EVA), ultra-low-density polyethylene (ULDPE), and ethylene-acrylic acid copolymer (EAA) is selected as the heat-sealing layer 1, and the low-density polyethylene (ULDPE) ) and ethylene-acrylic acid copolymer (EAA) are added in an amount of 10% to 30% in the heat-sealing layer 1 mixture, the melt index of the mixture is 1.0 to 4.0g / 10min, and the density is 0.88 to 0.94g / 10min. cm 3 .

[0030] Further, a mixture of ethylene-vinyl acetate copolymer (EVA), ultra-low density polyethylene (ULDPE), ethylene-acrylic acid copolymer (EAA) and ethylene-methacrylic acid copolymer (EMAA) is selected as the core layer 2, And the addition amount of the ultra-low density polyethylene resin (ULDPE), ethylene-acryl...

Embodiment 2

[0034] see figure 2 Shown, a kind of method for preparing above-mentioned multilayer co-extruded urine bag packaging film comprises the following steps:

[0035] 501) material preparation;

[0036] 502) multi-layer co-extrusion die extrusion;

[0037] 503) inflation;

[0038] 504) cooling and shaping;

[0039] 505) rotary traction;

[0040] 506) Online thickness measurement

[0041] 507) winding;

[0042] 508) Slitting.

[0043] Preferably, the inflation method used in step inflation 503 is blowing on multi-layer co-extrusion blowing equipment, and the inflation ratio is between 1.5-3.

[0044] Preferably, the cooling setting adopted in step cooling setting 504 is an air-cooling cooling setting method.

[0045] Further, the online thickness measurement device of the multi-layer co-extrusion blowing equipment is installed above the foam stabilization support, on the ring support, and adopts non-contact automatic film thickness measurement, display, tracking and feedbac...

Embodiment 3

[0047] see figure 2 Shown, a kind of method for preparing above-mentioned multilayer co-extruded urine bag packaging film comprises the following steps:

[0048] 501) material preparation;

[0049] 502) multi-layer co-extrusion die extrusion;

[0050] 503) inflation;

[0051] 504) cooling and shaping;

[0052] 505) rotary traction;

[0053] 506) Online thickness measurement

[0054] 507) winding;

[0055] 508) Slitting.

[0056] Preferably, the inflation method used in step inflation 503 is multi-layer co-extrusion down-blowing, and the inflation ratio needs to be controlled between 1-2 when blowing under multi-layer co-extrusion down-blowing equipment.

[0057] Preferably, the cooling setting adopted in step cooling setting 504 is a water-cooling cooling setting method.

[0058] Further, the online thickness measuring device of the multi-layer co-extrusion down-blowing equipment is installed at the exit position of a traction pressure roller or after the lateral deviat...

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Abstract

The invention discloses a packaging film for a multilayer co-extruding urine bag. The packaging film comprises a heat sealing layer, a core layer and a weather-resisting layer, which are arranged in turn, wherein the heat sealing layer, the core layer and the weather-resisting layer are modified ethylene-vinyl acetate copolymer layers. The invention also discloses a method for producing the packaging film for the multilayer co-extruding urine bag. The method comprises the following steps: preparing materials, extruding a multilayer co-extruding film head, blowing up, cooling and shaping, rotating and dragging, measuring thickness on line, coiling and cutting. The packaging film for the multilayer co-extruding urine bag provided by the invention is the packaging film which is excellent in comprehensive property, especially separating property, is suitable for various devices and interfaces, is excellent in properties for sealing and protecting urine, and is used as a urine packaging material applied to the medical field.

Description

technical field [0001] The invention relates to a packaging film made of a polymer material, more specifically, relates to a non-PVC multi-layer co-extruded urine bag packaging film used as a urine packaging material in the medical field instead of a PVC film. Background technique [0002] At present, the urine bags used in hospitals in our country are all made of polyvinyl chloride (PVC) film, because there are some problems with PVC film, mainly: [0003] (1) PVC film contains polyvinyl chloride monomer, which is not conducive to human health. [0004] (2) In the production process of PVC film, plasticizer (DEHP) is added to change its performance. During its use, DEHP may be dissolved. DEHP is a harmful substance and can release estrogen. Exposure to DEHP may lead to reproductive system development Bad, seriously endangering human health. [0005] (3) During the storage of the urine packaged in PVC film, the urine may react with the PVC film, resulting in inaccurate uri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/28
Inventor 李俊林武辉王光华
Owner SUZHOU HAISHUN PACKAGING MATERIAL
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