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High temperature and stretch resistant co-extrusion film for light guide plate

A co-extruded film, anti-stretching technology, used in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of good heat resistance and poor softness of packaging films, and achieve easy cutting, The effect of good viscosity and strong tensile strength

Active Publication Date: 2018-10-12
GUANGDONG DONGLI NEW MATERIALS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The packaging film obtained by this technology has good heat resistance but poor flexibility

Method used

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  • High temperature and stretch resistant co-extrusion film for light guide plate
  • High temperature and stretch resistant co-extrusion film for light guide plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of embodiment 1 high temperature resistant co-extruded film

[0034]It is processed by a three-layer co-extrusion blown film machine, 7kg POE and 8kg SEBS are added to the outer hopper, 9kg LDPE, 11kg MLLDPE and 20kg PP are added to the middle hopper, 20kg LDPE and 25kgPPA are added to the inner hopper; each hopper is mixed separately After uniformity, the temperature of the outer layer screw during processing is 180-190°C, the temperature of the middle layer screw is 175-185°C, the temperature of the inner layer screw is 165-175°C, and the temperature of the die head is 190-200°C. Extruded by a machine, blown into a tube film with a thickness of 130um through the die head; the tube film is cut and wound separately to obtain a co-extruded film.

Embodiment 2

[0036] It is processed by a three-layer co-extrusion blown film machine. Add 10POE and 7g SEBS to the outer hopper, add 5kg LDPE, 15kg MLLDPE and 20kg PP to the middle hopper, and add 18kg LDPE and 27kgPPA to the inner hopper; each hopper is mixed evenly Finally, during processing, the temperature of the outer layer screw is 180-190°C, the temperature of the middle layer screw is 175-185°C, the temperature of the inner layer screw is 165-175°C, and the temperature of the die head is 190-200°C. Extrusion, the outer, middle and inner layers are co-extruded and blown on the die to form a tube film with a thickness of 131um; the tube film is trimmed and wound separately to obtain a co-extruded film.

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Abstract

The invention provides a high-temperature-resisting and stretching-resisting coextruded film of a light guide plate and application of the high-temperature-resisting and stretching-resisting coextruded film. The coextruded film is characterized by coextruding and blowing three layers including an outer layer, a middle layer and an inner layer, wherein the outer layer is prepared from one or two of POE and SEBS; the middle layer is prepared by blending LDPE, LLDPE and PP according to the mass ratio from (1:0.5:1.5) to (1:2:3); and the inner layer is prepared by blending the LDPE and PPA according to the weight ratio of 1 to (1-1.5). The three-layered structure of the coextruded film adopts reasonable composition and ratios; and the product has a wide application range and good viscosity, can be applicable to various sticky light guide plates, can resist instant high temperature, has a strong stretching-resisting capability and is easy to cut.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-temperature-resistant and stretch-resistant co-extrusion film for a light guide plate and an application thereof. Background technique [0002] After the protective film currently applied to the light guide plate is attached to the surface of the light guide plate, the peeling force of the protective film will continue to increase as time goes by, resulting in the phenomenon that the protective film cannot be peeled off smoothly after use and there will be glue residue. In summer, the high-temperature and high-humidity weather environment exacerbates this phenomenon. The residual glue on the surface of the light guide plate is serious, and even the protective film is deformed and wrinkled, which affects the quality of the light guide plate. [0003] CN104789143A discloses a special polypropylene protective film for the smooth surface of a light guide plate, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/32
CPCB32B27/08B32B27/18B32B27/32B32B2307/306B32B2307/54
Inventor 唐承明
Owner GUANGDONG DONGLI NEW MATERIALS SCI & TECH CO LTD