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Polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof

A technology of polyurethane hot melt adhesive and polyurethane, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of difficult bonding of interlining and fabric, and achieve not easy to change color and deterioration, good diffusion ability, The effect of high peel strength

Inactive Publication Date: 2009-11-04
长兴三伟热熔胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of people's dress requirements, the introduction of new technologies and new processes in the fabric production process, new fabrics are constantly coming out, meeting people's requirements for clothing comfort and diversity, greatly enriching people's lives, but also It has brought many problems to garment manufacturers, the biggest problem is that the interlining and the fabric are difficult to bond

Method used

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  • Polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof
  • Polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof
  • Polyurethane hot melt adhesive for high-grade lining cloth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0064] Preparation of polyester polyol: Add ethylene glycol, 1,4-butanediol, 1,6-hexanediol in a molar ratio of 1:1:1 to adipic acid in an alkyd molar ratio of 1:1.25 Mixing, in the presence of the catalyst butyl titanate, at 140-220 DEG C, stepwise temperature rise reaction is adopted for 7-10 hours to carry out the alcoholysis reaction. During the reaction, the reaction system is protected with an inert gas to prevent the reaction liquid from turning yellow when exposed to oxygen, which will affect the color and appearance of the product. When the acid value of the mixture is lower than 25mg KOH / g, vacuumize, and continue the reaction under high vacuum (residual pressure≤100Pa) for 3 to 5 hours, and control until the alcoholysis reaction is complete. Carry out alcoholysis reaction at 140-220° C. for 7-10 hours, then vacuumize, and continue to react for 3-5 hours, thereby preparing polyester polyol.

Embodiment 1

[0066] Put 400g of polyester polyol and 50g of 1,4-butanediol in the reaction kettle in Preparation Example 1, heat to 120°C at 1.33KPa, dehydrate under reduced pressure for 30min under stirring, and then preheat to 305g of 4,4-diphenylmethane diisocyanate at 60°C was added, and 85g of toluene diisocyanate was added in 4 times within 2 hours under stirring, the reaction temperature was controlled at 110-115°C, and the reaction continued for 30 minutes after adding toluene diisocyanate , heat up to about 160°C, continue to stir for 30 minutes to form a prepolymer, then react with 150g of aromatic diamine chain extender C-1 to form polyurethane, add additives, and then grind and sieve under anaerobic conditions to obtain powder Polyurethane hot-melt adhesive for high-grade interlining, the number is SW-PU718.

[0067] The application of the product of the present invention on various fabrics has done a lot of cross-contrast tests with polyamide hot melt adhesives at home and abr...

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Abstract

The invention discloses the polyurethane hot melt adhesive for high-grade lining cloth, which is obtained through the reaction among polyester polyols with the relative molecular weight thereof being 2,000 to 2,200, 4,4-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), 1,4-butanediol (1,4-BDO) and aromatic diamine extender, wherein, the molecular weight of the polyurethane hot melt adhesive is 85,000 to 95,000. The polyurethane hot melt adhesive has the advantages of low thermal-bonding temperature and rapid crystallization, thereby facilitating the machining operations, preventing the polyurethane hot melt adhesive from being stuck to cloth and further preventing the polyurethane hot melt adhesive from penetrating and bleeding on ultra-thin loose base cloth; furthermore, the polyurethane hot melt adhesive has outstanding resistance to dry-cleaning and washing as well as washing under various caustic conditions. The invention further discloses a method for preparing the polyurethane hot melt adhesive for high-grade lining cloth.

Description

technical field [0001] The invention relates to a polymer material polyurethane hot melt adhesive. Background technique [0002] In recent years, my country's garment industry has made considerable progress, but compared with the world's advanced level, there is still a certain gap. It mainly exists in the narrow selectivity of hot melt adhesives for fusible interlinings to fabrics, and the relatively large limitations in pressing conditions and washing resistance, which affect the promotion of novel and changeable fabrics and the production of garments. It has even caused many garment companies to shelve their work because they cannot choose the fusible interlining that can be bonded to the fabric, causing designers to spend a lot of energy on choosing the fusible interlining that can be used, making some garments with high profit margins Unable to be produced and promoted. For those heat-sensitive and pressure-sensitive materials, in order to make the pressing process ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06
Inventor 殷伟乔
Owner 长兴三伟热熔胶有限公司
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