Forming system and method for film blowing processing of functional polymer material

A technology for functional polymers and polymer materials, applied in the field of molding systems for blown film processing functional polymer materials, can solve problems such as poor blown film processing performance, and achieve the effect of wide application range and simple process technology

Pending Publication Date: 2021-03-05
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to use the multi-layer co-extrusion blown film technology to realize the film production of the above-mentioned functional polymer materials with excellent performance, but poor blown film processing performance, or even difficult to carry out blown film processing, is of great significance.
However, to achieve this goal, two problems need to be solved: 1. How to continuously and uniformly extrude the target functional polymer material from the annular die; Uniformity of film

Method used

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  • Forming system and method for film blowing processing of functional polymer material
  • Forming system and method for film blowing processing of functional polymer material
  • Forming system and method for film blowing processing of functional polymer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Such as Figure 1-2 As shown, the embodiment of the present invention provides a molding device for blown film processing of functional polymer materials, including a five-layer co-extrusion die head 1 and a temperature control molding device 13; the target functional polymer material and the protective layer material are respectively After being melted and plasticized by the extruder, it enters the co-extrusion die 1, the target functional polymer material enters the flow channel 4, and the protective layer material enters the flow channels 2, 3, 5 and 6 respectively. After entering the runners 2, 3, 4, 5 and 6, first pass through a layer of filter structure in each runner to filter the solid particles that are not fully melted, and finally converge to the co-extrusion runner 9, the co-extrusion runner The ratio of the length of the die to the diameter of the die is 0.2 to 50. Adjusting the ratio can adjust the thickness distribution of the functional polymer material ...

experiment example 2

[0074] Utilize a kind of molding device and method for blown film processing functional polymer material provided in the above specific example 1, prepare biodegradable polymer poly(3-hydroxybutyrate-co-4-hydroxybutyrate ) film, the melting point of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) is 150°C, the crystallization temperature is 126°C, and the protective layer material is polyethylene and modified polyadipate / terephthalic acid Butylene formate has melting points of 112°C and 125°C respectively. Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) has low melt viscosity, narrow processing temperature window, and poor thermal stability, so it cannot be directly blown into film. Such as figure 1 As shown, poly(3-hydroxybutyrate-co-4-hydroxybutyrate) material enters runner 4, polyethylene enters runners 3 and 5, and modified poly(butylene adipate / terephthalate) Enter runners 2 and 6, die head temperature is 160°C, film inflation molding stage temperature is 131-135°C, inflation...

experiment example 3

[0076] Using the same method in Example 2, the difference from Example 2 is that the temperature of the film inflation molding stage is 140-145 ° C, the inflation ratio is 3.5, and the temperature of the film cooling and solidification stage is 80-85 ° C, The total thickness of the finally obtained five-layer co-extruded film was 140 μm, and the protective layer material was directly peeled off to obtain a single-layer poly(3-hydroxybutyrate-co-4-hydroxybutyrate) film with a thickness of about 24 μm.

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Abstract

The invention discloses a forming system and method for film blowing processing of a functional high polymer material. The forming method comprises the steps that a functional high polymer material melt passing through a film blowing die head is formed into a parison; the parison is subjected to blow-up molding under the assistance of a forming unit to form film bubbles; and the film bubbles are cooled and cured to form a functional polymer material film. According to the forming system and method, the anisotropic precise controllable adjustment of the target functional polymer film can be realized by adjusting the transverse blow-up ratio, the temperature in the blow-up forming stage, the traction ratio and the like in the temperature control forming stage according to use requirements.

Description

technical field [0001] The invention relates to the technical field of polymer film processing, in particular to a molding system and method for blown film processing of functional polymer materials. Background technique [0002] Film products of functional polymer materials such as polyphenylene sulfide, polyimide, polyether amide, thermotropic liquid crystal polymer, high-melting polyolefin material, nylon, polyether ether ketone, and polytetrafluoroethylene, etc. Their respective excellent performances have huge application markets and potential in the fields of high-frequency communication, aerospace, electronic appliances, etc.; biodegradable materials such as polylactic acid, polybutylene succinate, and polyhydroxyalkanoate Degradable film products have gradually become the mainstream of flexible packaging materials; however, although the film products of the above-mentioned various functional polymer materials have excellent performance in their respective fields, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/28B29C48/18B29C48/335B29C35/16
CPCB29C35/16B29C55/28B29C2035/1658B29C48/18B29C48/338
Inventor 李良彬赵浩远
Owner UNIV OF SCI & TECH OF CHINA
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