Foamed PET (polyethylene glycol terephthalate) plate slice, and preparation method thereof

A technology for slicing and sheeting, applied in the field of foamed PET sheet slicing and its preparation, to achieve the effects of improving melt strength, improving melt strength and intrinsic viscosity, and increasing molecular weight

Inactive Publication Date: 2012-12-05
GUANGDONG LIANSU TECH INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to melt strength and fluidity, there is no suitable processing technology and equipment to promote the expansion of foamed PET products in China

Method used

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  • Foamed PET (polyethylene glycol terephthalate) plate slice, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 100 parts of PET bottle-grade chips, dried at 140-150°C for 5 hours, the dried PET resin and 0.6 parts of highly active reactive group acrylic polyester multi-polymer were mixed in a high-speed mixer for 10 minutes, and then added polyether polyol and 0.1 parts of antioxidants formed from mixtures of phosphites and polybasic hindered phenols are mixed evenly. Extrude at 240-280°C with a twin-screw extruder, pelletize, dry, and pack for later use.

[0035] The dried slices are dried in a crystallization bed at 160-170°C for 2-3 hours, then solid-phase polycondensed in a vacuum drum at 220-240°C and a vacuum degree of 20-50Pa for 4-8 hours, and then packed.

[0036] The extruder temperature setting: 220°C 240°C 260°C 265°C 265°C 270°C 270°C 265°C; Die: 260°C.

Embodiment 2

[0038] 100 parts of PET bottle-grade chips, dried at 130-140°C for 8 hours, mixed the dried PET resin and 0.4 parts of high-activity epoxy resin chain extender in a high-mixer for 10 minutes, and then added polyether polyol and phosphite Mix 0.1 parts each of the antioxidants formed from the mixture of polyvalent hindered phenols and polybasic hindered phenols evenly. Extrude at 250-270°C with a twin-screw extruder, pelletize, dry, and pack for later use.

[0039] The dried slices are dried in a crystallization bed at 150-170°C for 2-3 hours, then subjected to solid-phase polycondensation in a vacuum drum at 220-240°C and a vacuum degree of 20-50 Pa for 4-8 hours, and then packed.

[0040] The extruder temperature setting: 220°C 240°C 260°C 265°C 270°C 270°C 270°C 265°C; Die: 265°C.

Embodiment 3

[0042] 100 parts of PET bottle-grade chips, dried at 130-140°C for 8 hours, mixed the dried PET resin and 0.3 parts of high-activity epoxy resin chain extender in a high-mixer for 10 minutes, and then added polyether polyol and phosphite 0.1 part of antioxidant formed from a mixture of polybasic hindered phenols and mixed evenly. Extrude at 250-270°C with a twin-screw extruder, pelletize, dry, and pack for later use.

[0043] The dried slices are dried in a crystallization bed at 150-170°C for 2-3 hours, then subjected to solid-phase polycondensation in a vacuum drum at 220-240°C and a vacuum degree of 20-50 Pa for 4-8 hours, and then packed.

[0044] The extruder temperature setting: 220°C 240°C 260°C 265°C 270°C 270°C 270°C 265°C; Die: 260°C.

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Abstract

The invention belongs to the field of high polymer material and particularly relates to a foamed PET (polyethylene glycol terephthalate) plate slice and a preparation method of the plate slice. The PET (polyethylene glycol terephthalate) plate slice is prepared by adding 0.1 to 5 parts of chain extender, 0.1 to 10 parts of flow promoter and 0.1 to 5 parts of antioxidant into 100 parts of bottle-level PET, mixing uniformly, extruding, cutting into particles, and then conducting solid-phase polymerization and adhesion-promotion. According to the PET plate slice and the preparation method, the chain extender is in moderate crosslinking with the PET to form the mesh branched structure and then the length of the molecular chain is enhanced by solid-phase adhesion-promotion so as to enhance the melt strength of the bottle-level PET, so that the intrinsic viscosity of the foamed PET (polyethylene glycol terephthalate) plate slice reaches to be 0.8-1.2dl / g and the melt index MFI is equal to 5-30g / 10min.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a foamed PET plate slice and a preparation method thereof. Background technique [0002] For consumers at large, polyethylene terephthalate (PET) is most familiar and widely used in PET bottles, and that's just one application for this lightweight, recyclable thermoplastic. Foamed PET as a core material will show us many application possibilities. In industrial applications, the most common sandwich materials are PVC, SAN, PMI, BALSA wood and honeycomb. The innovative PET core material exhibits an interesting ratio between density and stability - it is light, stable yet flexible, has high compressive strength and can withstand high temperatures. [0003] From a mid- to long-term perspective, if a manufacturing company wants to keep pace with global market competition, it must seize new market development opportunities and develop new materials. And foamed PET sandwich material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/00C08L63/00C08L71/00C08K5/053C08K5/524C08K5/13C08J3/24
Inventor 梁志成
Owner GUANGDONG LIANSU TECH INDAL
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