CN1031799C - Polyolefin fiber organic solvent adhesive - Google Patents

Abstract

The present invention belongs to auxiliary materials for polyolefine fiber cigarette filter tips, and relates to a polyolefine fiber organic solvent type adhesive. The present invention is composed of three parts, namely abietic acid ester and terpene resin, organic polymers and an organic solvent, wherein the organic polymers comprise polyolefin, polyvinyl acetate copolymers, polyacrylic acid ester or polymethacrylic acid ester and the copolymers thereof, polyester, acetals, etc., the organic solvent with low toxicity has certain volatility at 20 DEG C, and the weight percentage of the three parts is (0 to 20 %): (5 to 40%): (50 to 80%). The adhesive can be used on prior sizing forming cigarette filter stick mechanical devices, and thus, polyolefin fiber tows can be adhered to form the forming fibre filter sticks with air permeability.

Description

Polyolefin fiber organic solvent adhesive

The invention belongs to the subsidiary material of polyolein fiber (as polypropylene, polyethylene fibre etc.) cigarette filter, a kind of organic polymer adhesive formulation.

Multiple fiber can be used as gas filtering material, and the cigarette filter material is to filter out the objectionable impuritiess such as tar in the flue gas.Cellulose acetate (cellulose acetate) fiber (hereinafter to be referred as the CA fiber) is a kind of cigarette filter material commonly used.Spreading not volatile organic solvent or softening agent on the CA fiber, as glycerine triacetate, can be the fiber rod of a typing with a branch of CA fibrolysis, viscosity.The fiber rod of this root typing is promptly ventilative certain crushing resistance (hardness) again, is beneficial to cutting, brings many benefits for the processing, use etc. of filter stick.

Current China widelys popularize polypropylene (polypropylene is hereinafter to be referred as PP) the cigarette filter rod tow of application, than the CA tow high tensile strength and low density is arranged.If make the tobacco smoke filter element rod, can reduce an amount (weight) of using of single filter stick, the area that the plain surface of increased fiber contacts with flue gas with the PP fiber.But the weak point of polyolein fiber is its difficult solvability.That is to say, different with the CA fiber, also can not find the fiber rod that a kind of not volatile solvent becomes PP fiber cementing typing at normal temperatures at present.Therefore, the PP tow tobacco smoke filter element rod that uses in the prior art also only is a branch of bulk fibre silk with the paper bag volume.This is unfavorable for processing, the use of filter stick.Excessive for fear of filtering rod, and keep filter stick certain rigidity is arranged, with the bulk fibre rod of paper bag volume, its single filter stick not only fail to have increased on the contrary with the silk amount than the minimizing of CA fiber rod.

The U.S. specially and S4521493 introduced a kind of polyolein fiber filter stick water and milk formulation formed adhesive.But apply the fold that filter stick paper can appear in water and milk formulation tackiness agent, so that cause the bending of filter stick.Therefore, the present use of water and milk formulation tackiness agent is also had any problem.Chinese patent CN85105449 has introduced a kind of solvent type adhesive for adhering polyolefing, but this kind tackiness agent toxicity is higher, and contains the more material that adds, and should not be applied on the polyolein fiber tobacco smoke filter element rod.

The purpose of this invention is to provide a kind of polyolein fiber tow that makes and be bonded to typing fiber rod, improve the hardness of filter stick, improve processing, the use properties of PP fiber tow filter rods; Reduce the usefulness silk weight of single PP fiber tow filter rods, the ventilation property (applied amount is proper) of not blocking fibrous filter candle; Can overcome the deficiency that water and milk formulation tackiness agent causes filter stick paper fold, be suitable for the organic solvent adhesive that polyolein fiber tobacco smoke filter element rod is used.

The prescription of polyolefin fiber organic solvent adhesive provided by the invention is made of three parts:

A: the rare resin of rosin ester and terpene.Account for 0-20% (weight ratio) of solvent-based adhesive liquid, optimum proportion is 10-20%.Rosin ester with hydrogenated wood rosin glycerol ester for well.Can be food grade glyceryl ester, pentaerythritol ester or other pure ester.Also can partly add sylvic acid or staybelite, the softening temperature of rosin ester and terpine resin should be at 60-100 ℃.

B: organic polymer.Account for 5-40% of solvent-based adhesive liquid, optimum proportion is 8-30%.They can be polyolefine, silicon rubber, polyvinyl acetate copolymer, polyacrylic ester and multipolymer thereof, polymethacrylate and multipolymer thereof, polyester, polyethers (as the polyvinyl ethyl isobutyl ether), polyvinyl alcohol, acetal (as polyvinyl butyral acetal).Polyolefine has natural rubber and synthetic rubber, as polybutene, polyisobutene etc.Polyvinyl acetate copolymer has ethene-acetate ethylene copolymer.Polyacrylic ester and multipolymer thereof have vinylformic acid 2-ethylhexyl (or butyl ester)-vinyl acetate copolymer, and vinylformic acid 2-ethylhexyl (or butyl ester)-vinylbenzene (or methyl acrylate, ethyl ester) multipolymer.Wherein vinylformic acid 2-ethylhexyl-vinyl acetate copolymers that adopt more.Poly-(methyl) acrylate and multipolymer thereof can use the method for solution polymerization to obtain.The radical initiator that adopts has benzoyl peroxide, dicumyl peroxide.

C: organic solvent.Account for 50-80% (weight) ratio of solvent-based adhesive liquid.Optimum proportion is 60-75%.The solvent that is adopted is answered low toxicity, as far as possible low flavor, vapour pressure during with 20 ℃ 1-20mmHg for well.Requirement according to purposes or user also can improve vapour pressure.They can be ester, alcohol, alkane, ether, ketone.As Isoamyl Acetate FCC, isoamyl butyrate, Ethylisovalerate, ethyl lactate, n-Butyl lactate, ethyl cellosolve acetate, ethanol, 1-oxyethyl group-2-propyl alcohol, 1-butoxy-2-propyl alcohol, C _7-10Alkane, ethylene glycol monomethyl ether etc.Normal two or more solvent composition mixed solvent system that adopts.

Tackiness agent provided by the present invention also can be used for the bonding of polyolefin film and other material except that the bonding that is used for polyolein fibers such as polypropylene fibre, polyethylene fibre.

Its advantage of tackiness agent provided by the present invention is:

1. the tackiness agent matrix is nontoxic, tasteless; Nontoxic, the tasteless or low flavor of adhesive solvent, smell can vapor away in filter stick drying, solidification process.It is nontoxic that the affirmation of animal per os toxicity test is done to formed adhesive stoste by China Preventive Medicial Science Institute, and LD50 is greater than 10g/Kg.The China Preventive Medicial Science Institute and the Ministry of Public Security two the analytical results of harmful element in the formed adhesive stoste is shown that the content of harmful element meets the state health standards of candy, drinking mineral water in the organic solvent type formed adhesive.

2. tackiness agent matrix Heat stability is good, matrix flue gas to cigarette in filter tip does not produce peculiar smell.By Zhengzhou tobacco research institute, the Shandong Province comments the smoking result of the cigarette council and Zhangjiakou Cigarette Factory to see, the problem that applies the PP tow filter cigarette peculiar smell of tackiness agent has overcome substantially.The filter tipped cigarette of applying glue stick is compared with applying glue stick filter tipped cigarette not, and pungency is little.

3. become rod good.After applying the PP fiber tow filter rods dry solidification of formed adhesive, peel off outer coil paper, tow still remains straight and upright " rod ", and it is constant to place after 1 hour volume and profile.

4. be beneficial to the tipping of PP fiber tow filter rods and cigarette.The PP fiber tow filter rods that does not apply formed adhesive is prone to card machine phenomenon in tipping is produced, and behind the broken paper one loose bad cleaning behind the very high-intensity silk card machine is arranged, thereby influence the tipping rate of mouth cigarette.After applying the shaping tackiness agent, a branch ofly become the fiber rod with the tight silk of paper bag, the hardness of filter tip has improved, and the percentage of damage of bag paper has reduced, thereby has improved the tipping rate and the yield rate of filter-tip cigarette.

5. easily dry, curing behind the applying glue stick filter stick formation.Temperature about 25 ℃, all solvent is volatilizable clean in 48 hours in the environment of good air flowing.

6. on existing filter-stick forming device, can use, or it is available to improve, adjust the back a little.

7. apply tackiness agent 8-10% of the present invention, can make the individual cigarette weight of polypropylene filaments bundle filter stick approaching down to individual cigarette weight less than specification acetate silk filter stick of the same race.Compare with the polypropylene fibre tow filter stick that does not apply formed adhesive in the prior art, single filter stick fibre bundle consumption reduces about 15%.When improving filter rod quality, economic benefit is tangible (price of tackiness agent is lower than the price of polypropylene fibre tow).

Use the cigarette PP tow of Wuxi synthon head factory at Zhangjiakou Cigarette Factory, reach the cigarette PP tow that uses Jinan Fibre Plant at Jinan cigarette factory, apply organic solvent type formed adhesive of the present invention, moulding 120mm filter stick, 30 of sampling monitorings, average, detected result is summarized in following table.

Embodiment 1 (following all be weight percentage)

Polyethylene-vinyl acetate (Beijing Organic Chemical Plant trial product) 3%

Polybutene (resin institute of Beijing Yanshan Petrochemical Company provides) 5%

Hydrogenated rosin glyceride (Chinese forest-science academy woodsization provides food grade) 18%

Solvent 74%

Said components is mixed equably, promptly obtain tackiness agent of the present invention.

Embodiment 2

Natural rubber (rubber research institute in Beijing provides, special one-level rubber crepe sheet glue) 5%

Hydrogenated rosin glyceride 15%

Terpine resin (clear stream perfumery, Fujian Province product, T100) 5%

Solvent 75%

Embodiment 3

Natural rubber 12%

Staybelite pentaerythritol ester (Chinese forest-science academy woodsization provides) 12%

Terpine resin 3%

Solvent 78%

Embodiment 4

Polybutene 8%

Hydrogenated rosin glyceride 15%

Terpine resin 5%

Solvent 72%

Embodiment 5

Polyacrylic acid 2-ethylhexyl-vinyl acetate 10%

(buying two products of the Ministry of Public Security by oneself)

Hydrogenated rosin glyceride 16%

Staybelite (strain state, Hunan woodsization factory product) 2%

Solvent 72%

Embodiment 6

Polyacrylic acid 2-ethylhexyl-vinyl acetate 14%

Hydrogenated rosin glyceride 14%

Sylvic acid (Chinese forest-science academy woodsization provides) 2%

Solvent 70%

Embodiment 7

Polyacrylic acid 2-ethylhexyl-vinyl acetate 12%

Hydrogenated rosin glyceride 10%

Terpine resin 4%

Solvent 74%

Embodiment 8

Polyacrylic acid 2-ethylhexyl-vinyl acetate 5%

Hydrogenated rosin glyceride 10%

Terpine resin 5%

Solvent 80%

Embodiment 9

Butyl polyacrylate-vinyl acetate 20%

(buying two products of the Ministry of Public Security by oneself)

Hydrogenated rosin glyceride 10%

Solvent 70%

Embodiment 10

Polyvinyl butyral acetal (Chinese Academy of Sciences's chemistry provides) 50%

Solvent 50%

Embodiment 11

Silicon rubber (Nanjing University's chemical plant product, Nanjing University's 703 glue) 35%

Solvent 65%

Claims (2)

1. polyolefin fiber organic solvent adhesive, form by three parts:

A. rosin ester and terpine resin

B. organic polymer

C. organic solvent is characterized in that the rosin ester among the said A is hydrogenated rosin glyceride or staybelite pentaerythritol ester; B is a polybutene, natural rubber, polyacrylic acid 2-ethylhexyl-vinyl acetate; C is an Isoamyl Acetate FCC, isoamyl butyrate, Ethylisovalerate, ethyl lactate, n-Butyl lactate, ethanol, 1-oxyethyl group-2-propyl alcohol, 1-butoxy-2-propyl alcohol, C _7-10Alkane, ethylene glycol monomethyl ether uses two or more solvent composition mixed solvent system, and making the vapour pressure of system is 1-20mmHg in the time of 20 ℃; The weight ratio of A, B, C three parts is A: B: C=10-20%: 8-30%: 60-75%.

2. tackiness agent according to claim 1 is characterized in that the softening temperature of rosin ester and terpine resin is 60-100 ℃.