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Non-adhesive polyethylene protective film and preparation method thereof

A polyethylene protective film, polyethylene technology, applied in the direction of chemical instruments and methods, adhesives, ester copolymer adhesives, etc., to achieve the effects of good mechanical properties, increased compatibility, and high transparency

Active Publication Date: 2011-08-17
无锡达美新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of adhesive-free polyethylene protective film and preparation method thereof, to overcome the defect of existing adhesive-free polyethylene protective film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of adhesive-free polyethylene protective film: take the following components by weight percentage: base film layer: 30% of low-density polyethylene, 65% of linear low-density polyethylene and 5% of metallocene linear low-density polyethylene; : LDPE 35%, LLDPE 50% and ethylene-vinyl acetate copolymer 15%; Self-adhesive layer: LDPE 5%, LLDPE 15% and polyacrylate hot melt Sensitive rubber masterbatch 80%. Among them, the polyacrylate hot-melt pressure-sensitive adhesive masterbatch is prepared by uniformly loading polyacrylate hot-melt pressure-sensitive adhesive in low-density polyethylene. Mix the components of the above-mentioned base film layer, middle layer and self-adhesive layer evenly, and then respectively place them in a three-layer co-extrusion blown film machine, followed by plasticizing extrusion (temperature control at 150-180°C), blowing Swelling, cooling, traction, stripping and coiling to obtain the adhesive-free polyethylene protective film ...

Embodiment 2

[0027] Preparation of improved polyacrylate hot-melt pressure-sensitive adhesive masterbatch: 156 kg of polyacrylate hot-melt pressure-sensitive adhesive, 12.4 kg of low-density polyethylene, 30 kg of linear low-density polyethylene and 1.6 kg of zinc stearate were placed at high speed Mix in a mixer for 15-30 minutes, and then place it in a twin-screw extruder. Granulator granulation, and finally vacuum drying to obtain the improved polyacrylate hot-melt pressure-sensitive adhesive masterbatch.

[0028] Preparation of adhesive-free polyethylene protective film: take the following components by weight percentage: base film layer: 25% low-density polyethylene, 72% linear low-density polyethylene and 3% metallocene linear low-density polyethylene; middle layer : Low density polyethylene 30%, linear low density polyethylene 60% and ethylene-vinyl acetate copolymer 10%; self-adhesive layer: low density polyethylene 5%, linear low density polyethylene 5% and modified polyacrylate t...

Embodiment 3

[0030] Preparation of improved polyacrylate hot-melt pressure-sensitive adhesive: Add 5.0 kg of K12 emulsifier, 5.0 kg of OP-10 emulsifier, 180 kg of deionized water, 5.0 kg of methacrylic acid, and 7.5 kg of methacrylic acid shrinkage into the pre-emulsification kettle Glycerides, 225 kilograms of methyl methacrylate, 100 kilograms of butyl acrylate and 150 kilograms of isooctyl acrylate were fully stirred to obtain a pre-emulsion; then 270 kilograms of deionized water and 35 kilograms of pre-emulsified solution and 1.0 kg of ammonium persulfate, and the temperature was raised to 75°C for polymerization; when the reaction showed obvious blue fluorescence, the remaining pre-emulsion and initiator solution were added dropwise to the reaction kettle (dissolve 1.5 kg of ammonium persulfate in 50 kg of deionized water), adjust the rate of addition of the two, control the reaction temperature at 80-85°C, and complete the dropwise addition in about 3.5 hours; after the addition, keep...

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Abstract

The invention discloses a non-adhesive polyethylene protective film and a preparation method thereof. The non-adhesive polyethylene protective film comprises a base film layer, an intermediate layer and a self-adhesive layer, wherein the base film layer comprises the following components in percentage by weight: 25 percent to 60 percent of low-density polyethylene, 40 percent of 75 percent of linear low-density polyethylene and 1 percent to 10 percent of metallocene linear low-density polyethylene. The intermediate layer comprises the following components in percentage by weight: 30 percent to 60 percent of low-density polyethylene, 40 percent to 70 percent of linear low-density polyethylene and 10 percent to 30 percent of ethylene-vinylacetate copolymer. The self-adhesive layer comprises the following components in percentage by weight: 5 percent to 15 percent of low-density polyethylene, 5 percent to 20 percent of linear low-density polyethylene and 80 percent to 90 percent of polyacrylate hot-melt pressure sensitive adhesive master batch. The non-adhesive polyethylene protective film has the advantages of high viscous force, no adhesive residue, good mechanical property, high transparency and the like. The defects of the existing polyethylene film can be overcome.

Description

technical field [0001] The invention relates to an adhesive-free polyethylene protective film and a preparation method thereof. Background technique [0002] At present, there are two ways to industrially produce polyethylene protective film: coating method and co-extrusion method. The coating method is to apply an emulsion or solution pressure-sensitive adhesive on the prepared film substrate (ie base film), then heat, remove the solvent or dispersant, and wind up to obtain a protective film. The co-extrusion method is to synchronously extrude and compound the self-adhesive material layer and the substrate layer through co-extrusion compound equipment (co-extrusion blow molding or co-extrusion casting equipment) to obtain a protective film. An ideal method. Because it does not need to use the traditional glue coating process, the protective film produced by this method is called glue-free protective film in the industry. [0003] Self-adhesive materials commonly used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32C08L23/06C08L23/08C09J7/02C09J133/04B29C55/28
Inventor 李国荣王洪张刚
Owner 无锡达美新材料有限公司
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