Production process of multi-layer co-extrusion film with good corrosion resistance based on fluororesin
A corrosion-resistant, multi-layer co-extrusion technology, applied in the field of multi-layer co-extrusion film production technology, can solve the problems of poor helium or hydrogen barrier, poor corrosion resistance of film materials, high and low temperature aging resistance, etc., to improve wear resistance properties, good bonding performance, and the effect of improving gas barrier properties
Inactive Publication Date: 2021-10-26
天津新兴东方临近空间航天科技有限公司
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-layer co-extruded film production process based on fluororesin with good corrosion resistance, which solves the problems of poor corrosion resistance of film materials, high and low temperature aging resistance, and low mechanical strength , poor helium or hydrogen barrier, UV aging, etc.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] The invention provides a technical solution: a multi-layer co-extruded film production process based on fluororesin with good corrosion resistance, comprising the following steps:
[0024] S1. Metering: Add raw and auxiliary materials such as nylon, polyethylene, acid-modified polyolefin composite, ethylene tetrafluoroethylene polymer (the raw and auxiliary materials are all granular) into the hopper of the extruder manually, And according to a specific ratio for automatic metering and mixing ratio.
[0025] S2. Drying: For high polymers that tend to absorb moisture, they need to be dried before processing. The drying temperature is about 80-150°C, and the drying time is about 4-24 hours. The moisture content of the dried polymer chips is required. Control below 50ppm.
[0026] S3. Feeding and extrusion: When the extruder and head meet the heat preservation requirements (ie: the temperature is 220-310°C), start the extruder and add a small amount of raw and auxiliary m...
Embodiment 2
[0035] The specific difference from Example 1 is that in S2, a film with a double-layer or single-layer structure is blown out through an extruder.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a production process of a multi-layer co-extrusion film with good corrosion resistance based on fluororesin. According to the production process of the multi-layer co-extrusion film with good corrosion resistance based on the fluororesin, a high-performance multi-layer composite fluorine film is prepared by adopting flat extrusion and upward blowing equipment; according to the multi-layer composite fluorine film, the advantages of a multi-layer structure are utilized, and fluororesin on the outermost layer is resistant to high and low temperature, ultraviolet aging, friction and corrosion and can block water; a bonding layer is connected with the fluororesin and a gas barrier layer, so that good bonding performance is achieved; the gas barrier layer is made of a high-performance unmodified (or modified) barrier material; according to the multi-layer composite film organically prepared from the three layers, a film blow molding process is adopted, so that macromolecules in the ETFE film are arranged in order in the transverse direction and the longitudinal direction; the transverse and longitudinal mechanical properties (tensile strength, tensile modulus, breaking strength and breaking elongation) of the ETFE film are further improved; and the multi-layer composite fluorine film can also be used as a barrier layer of a near space airship.
Description
technical field [0001] The invention relates to the technical field of high-altitude balloons, in particular to a multi-layer co-extruded film production process based on fluororesin with good corrosion resistance. Background technique [0002] The existing technology is mainly based on conventional structures, such as: LLDPE multilayer composite film; helium or hydrogen barrier film prepared from special PET and other materials, which are mainly used in high-altitude balloons, helium barrier layers of adjacent space aerostats, etc. Part, conventional structure: LLDPE / AD / EVOH / AD / LLDPE or special PET single layer; other films containing EVOH, blocking helium or hydrogen, principle: the principle of multilayer or single layer film blocking helium is the internal fine structure of the film The tortuous channel blocks gas molecules. [0003] However, in actual use, there are still some disadvantages: LLDPE is linear low-density polyethylene, the toughness of the material is rel...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B29C48/00B29C48/10B29C48/21
CPCB29C48/0018B29C48/0022B29C48/10B29C48/21B29C48/023B29C2793/009B29C2793/0063
Inventor 不公告发明人
Owner 天津新兴东方临近空间航天科技有限公司