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Single-face matt polyester film and preparation method thereof

A polyester film and matte technology, applied in the field of polyester film, can solve the problems of complex process, increase the complexity of the process, poor matte effect, etc., and achieve the effect of simple process process, improved matt effect and light transmittance.

Inactive Publication Date: 2008-09-10
WEIFANG FUWEI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to use surface coating to produce a matt effect. The matt film prepared by this process has good mattness and light transmittance, but the process is complicated and the production cost is high.
The second method is to use multi-layer co-extrusion technology, adding inorganic or organic inert particles to the surface to produce a matte effect, such as silicon dioxide, calcium carbonate, talcum powder, cross-linked polystyrene microspheres, and polyacrylic acid. Resin microspheres, etc. The matte polyester film prepared by this process requires a special matt masterbatch, which increases the complexity of the process, and the film has high haze, low light transmittance, and low matteness, which limits its use in Applications in printing, aluminum plating and other industries
The third method is also prepared by co-extrusion technology. Two or more polymers are added to the surface layer to produce a matte effect through the phase separation between the polymers. The selected polymers are usually PP, PE, PS etc. The polyester film made by this method usually has high haze and poor matt effect, which limits its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw material formula:

[0034] 1) matte layer

[0035] 80 parts by weight of PBT (polybutylene terephthalate);

[0036] 20 parts by weight of PA6;

[0037] Sodium benzoate 0.1 parts by weight.

[0038] 2) High transparency layer

[0039] 100 parts by weight of PET (polyethylene terephthalate) chips.

[0040] Operating process:

[0041] Mix PBT, PA6 and sodium benzoate evenly in the mixing chamber according to the proportion, then add them into the twin-screw extruder, and set the temperature of the extruder to 200°C;

[0042] After the PET chips are pre-crystallized and dried, the moisture content is controlled below 50ppm, and then added to the single-screw extruder, and the temperature of the extruder is set at 260°C;

[0043] The melts extruded by two extruders respectively pass through the co-extrusion die, and cast on the chilled roll to form a sheet, and the temperature of the chilled roll is 25°C;

[0044] The extrusion capacity of the twin-screw extruder ...

Embodiment 2

[0047] Raw material formula:

[0048] 1) matte layer

[0049]50 parts by weight of PBT (polybutylene terephthalate);

[0050] 20 parts by weight of PET (polyethylene terephthalate);

[0051] 30 parts by weight of PA66;

[0052] 0.2 parts by weight of sodium terephthalate carboxylate.

[0053] 2) High transparency layer

[0054] 100 parts by weight of PET (polyethylene terephthalate) chips.

[0055] Operating process:

[0056] Mix PBT, PET, PA66, and sodium terephthalate carboxylate evenly in the mixing bin in proportion, and add them to the twin-screw extruder, and set the temperature of the extruder to 220°C;

[0057] After the PET chips are pre-crystallized and dried, the moisture content is controlled below 50ppm, and then added to the single-screw extruder, and the temperature of the extruder is set at 270°C;

[0058] The melts extruded by two extruders respectively pass through the co-extrusion die, and cast on the chilled roll to form a sheet, and the temperature ...

Embodiment 3

[0062] Raw material formula:

[0063] 1) matte layer

[0064] 40 parts by weight of PBT (polybutylene terephthalate);

[0065] 20 parts by weight of PTT (polytrimethylene terephthalate);

[0066] 40 parts by weight of PA11;

[0067] 0.3 parts by weight of substituted aryl phosphate ester salt.

[0068] 2) High transparency layer

[0069] 100 parts by weight of PET (polyethylene terephthalate) chips.

[0070] Operating process:

[0071] Mix PBT, PTT, PA11, and substituted aryl phosphate ester salts in the mixing bin in proportion, and add them to the twin-screw extruder, and set the temperature of the extruder to 230°C;

[0072] After the PET chips are pre-crystallized and dried, the moisture content is controlled below 50ppm, and then added to the single-screw extruder, and the temperature of the extruder is set at 280°C;

[0073] The melts extruded by two extruders respectively pass through the co-extrusion die, and cast on the chilled roll to form a sheet, and the tem...

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Abstract

The invention discloses a single-side matt polyester film with a layered structure comprising at least a first film layer and a second film layer which are co-extruded, compounded with each other and arranged next to each other; the first film layer is arranged on the surface layer of the polyester film and is a matt layer, which contains 50 to 80 wt percent of the polyester, 20 to 50 wt percent of nylon polymer and 0 to 0.5 wt percent of crystal nucleating promoter; the second film layer is a highly transparent layer, the main component of which is the polyester. The invention also discloses a method for manufacturing the single-side matt polyester film. As the method does not require the aforehand special preparation of the matt master batch, the whole process is simple. The manufactured polyester film not only has favorable matt effect, but also has excellent transmittance and is in particular applicable to the use for printing, aluminum plating and compounding in the field of packaging.

Description

technical field [0001] The invention relates to the technical field of polyester films, in particular to a single-sided matte polyester film, and also relates to a method for manufacturing the polyester film. Background technique [0002] The polyester film used in packaging and industrial fields is usually high-brightness. Due to the special effect of matte polyester film, when used as a packaging material, it can make the packaged object produce a hazy artistic effect and increase the quality of the packaged product. Attractiveness of items on the shelf. [0003] Matt polyester film is divided into single-sided matt and double-sided matt from the appearance structure. Double-sided matt film is usually used in bronzing and transfer fields due to its large haze; single-sided matte film has only one matte layer and has good transparency. In addition to being used in bronzing and transfer fields, it is more suitable for printing and aluminum plating and composite fields. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/18C08L67/00C08K5/098C08K5/12C08K5/521C08K3/24C08K5/06B29B7/00B29C47/06B29C47/78B29C55/14B29C69/00B29C71/02B29C59/10
Inventor 孙文训靳钊张雷彭宜海童薇刘志强腾岩
Owner WEIFANG FUWEI PLASTIC
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