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High-peel-strength hot melt adhesive composition

A technology of hot-melt adhesives and compositions, which is applied in the field of hot-melt adhesive compositions for bonding polyester films, can solve the problems of easy detachment of polyester films and low T-peel strength, and achieve easy pre-coating, high Moderate peel strength and melt viscosity

Active Publication Date: 2014-02-12
上海理日化工新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the imported and domestic solvent-based or solvent-free polyester polyurethane liquid composite adhesives, polyurethane or polyester hot-melt adhesive products have low T-peel strength measured after bonding polyester film, and the polyester film after bonding Membrane releases easily

Method used

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  • High-peel-strength hot melt adhesive composition
  • High-peel-strength hot melt adhesive composition
  • High-peel-strength hot melt adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 50 parts by weight of PES-130T and 50 parts by weight of TYA were mixed, heated to about 200°C, melted and blended uniformly to obtain the copolyester hot melt adhesive composition A of the present invention.

[0036] The copolyester hot-melt adhesive composition of the present invention is evenly coated on the PET polyester film, and then bonded with another layer of PET polyester film by hot pressing. The hot pressing temperature is about 200 ° C, and the thickness of the adhesive layer is ≥10μ, the thickness of PET polyester film is 0.1mm, and the hot pressing time of manual electric iron is 5 seconds. Cut into 2.5cm wide test strips after bonding and carry out T-type peel strength test, the tensile speed is 50mm / min, and the measured T-type peel strength ≥ 40N / cm (see attached figure 1 ). However, after 2 months of storage, the T-peel strength decreased somewhat. In addition, the softening point measured by the above-mentioned standard method was 120°C, the melt v...

Embodiment 2

[0038] Accurately weigh each raw material according to the following formula, heat to about 200°C, and melt and blend uniformly to prepare the copolyester hot-melt adhesive composition B of the present invention, wherein an appropriate amount of carboxylic acid grafted polypropylene wax is added.

[0039] Component name Parts by weight

[0040] PES-130T copolyester hot melt adhesive 50

[0041] TYA copolyester hot melt adhesive 50

[0042] Licomont AR504 5

[0043] 105

[0044]The copolyester hot-melt adhesive composition B of the present invention that is prepared is uniformly coated on the PET polyester film by the same method as Example 1, and carries out T-type peel strength test, and the T-type peel strength measured on the same day after bonding Strength ≥ 50N / cm (see attached figure 2 ). At the same time, the blended hot melt adhesive was measured, and its softening point was 120° C., its melt viscosity was 52800 mPa.s / 200° C., and its hardness ...

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Abstract

The invention provides a hot melt adhesive composition. The hot melt adhesive composition comprises a blend of at least two polyester hot melt adhesives in a weight ratio of (40-60):(60-40). Every 100 weight parts of the blend of at least two polyester hot melt adhesives preferably comprise 1 to 10 weight parts of carboxylic acid grafted and modified poly propylene wax, preferably maleic anhydride modified poly propylene wax. The hot melt adhesive composition can improve the peel strength of a polyester film obviously, and can preferably keep the high peel strength for a long time.

Description

technical field [0001] The present invention relates to a hot-melt adhesive composition with high peel strength, in particular to a hot-melt adhesive composition for bonding polyester films with high peel strength. Background technique [0002] At present, the adhesives used to bond polyester (PET) films mainly use solvent-based or solvent-free polyester-based polyurethane liquid composite adhesives, and there are also very few that use polyurethane or polyester hot-melt adhesives for hot-melt pre-coating on polyester. on the surface of the film, and then heat-compressed. Although the surface energy of polyester film material is relatively large (up to 43 dynes / cm), polyester film is a difficult-to-stick material due to the high crystallinity of polyester. In order to reduce the crystallinity of the polyester film material and increase the polarity, the surface treatment of the polyester film is generally carried out, such as corona treatment. Although the polyester film i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J167/00C09J167/02C09J151/06C09J7/02B32B7/12
Inventor 翁国建
Owner 上海理日化工新材料有限公司
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