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Preparation method of medical bubble cap two-way stretching nylon film

A biaxially stretched nylon and film technology, applied in applications, household appliances, flat products, etc., can solve the problems of low heat shrinkage, achieve low heat shrinkage, small difference in heat shrinkage, and good mechanical and physical properties

Inactive Publication Date: 2021-08-13
KUNSHAN YUNCHENG PLASTIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Biaxially oriented nylon film (BOPA) is widely used, mainly in the food packaging industry, and its excellent oxygen barrier properties are also used in the medical field with strict requirements. The medical blister film uses BOPA as the base layer, which can ensure In order to prolong the shelf life of medicines, the strict requirements of BOPA for blisters, in addition to excellent flatness, have high requirements for mechanical and physical properties, and the heat shrinkage rate is much lower than that of general-purpose BOPA. At the same time, the difference between transverse and longitudinal heat shrinkage is also strict Requirements, can not be greater than 0.5%, the current domestic BOPA products can not well meet the requirements of blister film

Method used

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  • Preparation method of medical bubble cap two-way stretching nylon film

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Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a medical blister biaxially stretched nylon film, comprising the steps of:

[0033] S1. Improve and set MDO device:

[0034] The surface material of the MDO preheating 1# roller is made of ceramic surface;

[0035] The material of the MDO stretching roller is Teflon, and a coating with a length of 10mm and a thickness of 0.1mm thicker than other positions in the middle is provided on the two sides;

[0036] Improve the balance of the pressure rollers in the preheating and stretching areas, the middle height is controlled at 1mm, and the pressure rollers in the cooling area have no middle height;

[0037] The temperature in the preheating zone 1 is controlled above 70 degrees, the stretching temperature is controlled at 66 degrees C, and the heat shrinkage in the MD direction is controlled to be less than 1.5%;

[0038] Set the stretch ratio and stretch gap to ensure that the stretch neck-in is less than 5%;

[0039] The temperature in the MDO ...

Embodiment 2

[0054] A preparation method of a medical blister biaxially stretched nylon film, comprising the steps of:

[0055] S1. Improve and set MDO device:

[0056] The surface material of the MDO preheating 1# roller is made of ceramic surface;

[0057] The material of the MDO stretching roller is Teflon, and a coating with a length of 12mm and a thickness of 0.1mm thicker than other positions in the middle is provided on the two sides;

[0058] Improve the balance of the pressure rollers in the preheating and stretching areas, the middle height is controlled at 1mm, and the pressure rollers in the cooling area have no middle height;

[0059] The temperature in the preheating zone 1 is controlled above 70 degrees, the stretching temperature is controlled at 67 degrees, and the heat shrinkage in the MD direction is controlled to be less than 1.5%;

[0060] Set the stretch ratio and stretch gap to ensure that the stretch neck-in is less than 5%;

[0061] The temperature in the MDO area...

Embodiment 3

[0076] A preparation method of a medical blister biaxially stretched nylon film, comprising the steps of:

[0077] S1. Improve and set MDO device:

[0078] The surface material of the MDO preheating 1# roller is made of ceramic surface;

[0079] The material of the MDO stretching roller is Teflon, and a coating with a length of 15mm and a thickness of 0.1mm thicker than other positions in the middle is provided on the two sides;

[0080] Improve the balance of the pressure rollers in the preheating and stretching areas, the middle height is controlled at 1mm, and the pressure rollers in the cooling area have no middle height;

[0081] The temperature in preheating zone 1 is controlled above 70°C, the stretching temperature is controlled at 68°C, and the heat shrinkage in the MD direction is controlled to be less than 1.5%;

[0082] Set the stretch ratio and stretch gap to ensure that the stretch neck-in is less than 5%;

[0083] The temperature in the MDO area is controlled...

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Abstract

The invention discloses a preparation method of a medical bubble cap two-way stretching nylon film. The preparation method comprises the following steps of S1, improving and arranging MDO equipment; S2, arranging TDO equipment; S3, extruding to obtain a melt; S4, extruding the melt through a die head, and casting to a chilling roller to obtain a cast sheet; and S5, carrying out longitudinal stretching and transverse stretching on the obtained cast sheet to form the medical bubble cap two-way stretching nylon film with excellent thickness distribution. The medical bubble cap two-way stretching nylon film prepared by the method is used as a base layer of a medical bubble cap film, can ensure and prolong the shelf life of medicines and meet the strict requirements of BOPA for bubble caps, has excellent flatness and good mechanical and physical properties, has a thermal shrinkage rate much lower than that of general BOPA, meanwhile, has a smaller transverse and longitudinal thermal shrinkage difference, and can well meet the requirements of the medical bubble cap film.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a method for preparing a medical blister biaxially stretched nylon film. Background technique [0002] Biaxially oriented nylon film (BOPA) is widely used, mainly in the food packaging industry, and its excellent oxygen barrier properties are also used in the medical field with strict requirements. The medical blister film uses BOPA as the base layer, which can ensure In order to prolong the shelf life of medicines, the strict requirements of BOPA for blisters, in addition to excellent flatness, have high requirements for mechanical and physical properties, and the heat shrinkage rate is much lower than that of general-purpose BOPA. At the same time, the difference between transverse and longitudinal heat shrinkage is also strict Requirements, can not be greater than 0.5%, the current domestic BOPA products can not well meet the requirements of the blister film. Contents of the i...

Claims

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Application Information

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IPC IPC(8): B29C55/12B29C69/02B29L7/00B29K77/00
CPCB29C55/12B29C69/02B29L2007/00B29K2077/00
Inventor 周军
Owner KUNSHAN YUNCHENG PLASTIC IND CO LTD
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