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Polyurethane hot melt adhesive for adhesive interlinings and preparation method thereof

A technology of polyurethane hot-melt adhesives and adhesives, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problem of complex production process of polyamide adhesives, insufficient production raw material sources, Problems such as poor product quality stability, to achieve the effect of good product quality stability, easy control, and low production cost

Active Publication Date: 2010-06-30
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the fusible interlining is widely used in the garment manufacturing industry. In the prior art, the adhesives coated on the fusible interlining to play the role of bonding the interlining are mainly polyamide adhesives. The shape of the agent is messy and irregular after being coated on the fusible interlining, which affects the feel of the interlining
In addition, the production process of polyamide adhesives is complicated, the product quality stability is poor, and the source of raw materials for its production is not abundant, resulting in its relatively high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A preparation method of polyurethane hot-melt adhesive for adhesive interlining comprises the following steps and process conditions:

[0027] a. Vacuumize and dehydrate the diol at 120°C for 4 hours, the vacuum degree is -0.1Mpa, so that the water content is ≤0.03%.

[0028] b. Vacuumize and dehydrate the chain extender at 100°C for 4 hours, the vacuum degree is -0.1Mpa, so that the moisture content is ≤0.03%.

[0029] c. Mix the diol and chain extender and diisocyanate obtained in step a and step b uniformly in proportion, and add the mixture to the extruder in a metered manner. The feeding amount is 60-100kg / h, and the extruder The rotation speed is 70-100rpm, the extruder is a twin-screw extruder, the aspect ratio is 64:1, and the reaction temperature is 130-180°C.

[0030] d. Add the catalyst from the second zone of the extruder by dripping, and the dripping speed is controlled at 30-60 drops / min.

[0031] e. After the strips are extruded, they are pelletized by ...

Embodiment 1

[0036] ① Vacuum dehydrate polytetramethylene ether glycol at 120°C for 4 hours to make the water content ≤0.03%.

[0037] ② Vacuum dehydrate 1,4-butanediol at 100°C for 4 hours to make the water content ≤0.03%.

[0038] ③Heat diphenylmethane diisocyanate at 100°C for 12 hours to melt it.

[0039] ④ Accurately weigh 2000g of polytetramethylene ether glycol, 30g of 1,4-butanediol and 343.33g of diphenylmethane diisocyanate in the storage tank, and stir it evenly, and the mixed solution is measured Put it into the extruder, the feed rate is 60kg / h, the main engine speed is 70rpm, the temperature of the first zone of the extruder is controlled to be 80±5°C, the temperature of the second zone is 100±5°C, and the temperature of the third zone to the twentieth zone is 150±5℃, head temperature 160±5℃.

[0040] ⑤ Add the catalyst stannous octoate from the second zone of the extruder by dripping, and the dripping speed is controlled at 40 drops / min.

[0041] ⑥After extrusion, the str...

Embodiment 2

[0043] ① Vacuum dehydrate the polyoxypropylene glycol at 120°C for 4 hours to make the moisture content ≤0.03%.

[0044] ② Vacuum dehydrate ethylene glycol at 100°C for 4 hours to make the water content ≤0.03%.

[0045] ③ Accurately weigh 2000g of polyoxypropylene diol, 60g of ethylene glycol and 532.17g of toluene diisocyanate in the storage tank, and stir it evenly, and add the mixed solution into the extruder by metering, the feeding amount is 80kg / h, the speed of the main engine is 80rpm, the temperature of the first zone of the extruder is 80±5℃, the temperature of the second zone is 100±5℃, the temperature of the third zone to the 20th zone is 170±5℃, and the temperature of the head is 180±5℃ 5°C.

[0046] ④ Mix the catalyst stannous octoate and ethylenediamine evenly in a mass ratio of 3:1, and add it from the second zone of the extruder by dripping, and the dripping speed is controlled at 30 drops / min.

[0047] ⑤ After the strip is extruded, it is pelletized by an u...

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Abstract

The invention discloses a polyurethane hot melt adhesive for adhesive interlinings. The formula of polyurethane hot melt adhesive includes diisocyanate, dihydric alcohol, chain extender, crosslinking agent, antioxidant, anti-yellowing agent, catalyst, coupling agent and the like, a reaction type double-screw extruder is used for continuous production, the production technique is simple, the efficiency is high, the produced adhesive can be ground into powder under a low temperature, and is coated on a base fabric in the form of points by special-purpose equipment, the base fabric is then dried, so that an adhesive interlining is produced, and the produced adhesive interlining has the advantages of high bonding strength, good water resistance and good handle.

Description

technical field [0001] The invention relates to a polyurethane hot-melt adhesive and a preparation method thereof, in particular to a hot-melt adhesive used in the adhesive lining field and a preparation method thereof. technical background [0002] Fusible interlining is a kind of interlining that evenly bonds a layer of hot-melt adhesive on the base fabric (cotton woven fabric, non-woven fabric, etc.) in the form of dots. After the layers are pressed to form a fusible interlining, the garment becomes crisp, elastic and stays in shape. In addition, the use of fusible interlining simplifies the garment process, reduces production costs and improves the grade of garments. Therefore, the fusible interlining is widely used in the garment manufacturing industry. In the prior art, the adhesives coated on the fusible interlining to play the role of bonding the interlining are mainly polyamide adhesives. The shape of the agent is chaotic and irregular after being coated on the fu...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J175/08C09J175/06D06M17/10
Inventor 靳东杰林能深唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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