JPS6043372A - Tobacco filter plug - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cigarette filter plug that has significantly improved performance such as web adhesion.

Cigarette filter plugs are made using a filter plug manufacturing machine, using a 74μ material such as cellulose acetate,
Polyethylene, polypropylene.

Synthetic materials such as polyvinyl alcohol, recycled materials such as pulp sheets, V-paper, and Gauss fibers, or natural materials such as cotton wool, are subjected to the necessary pretreatment, and then filter material filaments are prepared. After adding similar binders, additives to improve the filter function or several times the inspection taste, etc., it is formed into a rod-shaped fill leg, and at the same time, the rod-shaped 1 + full roll is overlapped with both ends of the roll paper. After pasting the parts (hereinafter referred to as the wrap parts) with adhesive, the 111! will be built. In addition, when macerating dual filters and trip filters, cut multiple types of pre-manufactured filter plug materials into predetermined lengths, arrange them in a predetermined order, and add additives, etc., if necessary. By filling it, simultaneously rolling it up into a rod-shaped body with a roll paper, pasting the wrapped part of the roll paper, and cutting it to a predetermined length, ii.
+! ! will be built. Before rolling up the formed filter rod, an adhesive called "wrap glue" is applied to the inner surface of the overlapping part of the web, which is usually the outer side, and fixes the filter rod and the web. In order to do this, an adhesive called ``lay'' is applied in a linear manner approximately at the center of the inner surface of the web. Lay glue and wrap glue depend on the film plug manufacturing conditions.
Adhesives of the same type or different types may be used.

Conventionally, the adhesive used in this filter plug manufacturing machine was
Vinyl acetate emulsion was used, but recently, as filter plug manufacturing machines have become faster and plug paper has become more porous (higher air permeability), hot melt adhesives are increasingly being used. Efficiency has been greatly improved. However, the hot melt adhesives currently in common use are ethylene-vinyl acetate copolymers (
Filter plugs made using this formulation have the following drawbacks:

That is, first of all, the adhesive strength of the wrap portion of the web is
Initially, the level is generally sufficient to be suitable for use in filter cigarette factories, but it tends to decrease over time and reaches a level unsuitable for use in about 4 to 6 months (approximately 597 lap width). ), which may cause problems such as the wrap part peeling off during or before use.

Therefore, the manufactured 74〃Tarpwog is filter manufacturer and cigarette I! ! ! Both manufacturers must always keep inventory management in mind and ensure that products are used within two to three months. Furthermore, if the cigarettes are stored for six months or more, such as for export, there is a risk that the wrap will peel off before use at a cigarette manufacturing factory.

Second, filter cigarettes! In the manufacturing process, a filter plug (01i1
When cutting a filter tip (twice the length of the product's filter tip) into two equal parts with a rotary knife, the hot melt adhesive used for manufacturing the filter plug will adhere to the knife, but if there is a large amount of adhesive, Due to the increased frequency of stopping the tobacco winding machine and cleaning the knife, it is difficult to improve production efficiency.
) It is strongly desired to reduce the amount of adhesive oil applied as much as possible (to reduce the amount of glue adhering to 59 or less according to the test method described below).

The present inventors have investigated the disadvantages of using the above-mentioned holatome/l/[adhesive as a base polymer.
The deterioration of the adhesive strength of the first web wrap portion over time is due to insufficient affinity and adhesion between the applied hot melt adhesive layer and the web surface, as well as insufficient adhesive strength of the filter material wound onto the hot melt adhesive layer. The main cause is that stress in the direction of opening the roll due to swelling is applied, causing cold flow (creep at room temperature) within the hot melt adhesive layer. Holatome/I/[Adhesive adhesion is considered to be caused mainly by the lack of cohesive force (crystallinity) and heat resistance of the adhesive itself, and has properties that can prevent these causes. As a result of intensive investigation into hot melt adhesives, that is, hot melt adhesives with excellent cohesive strength, creep resistance, l1li1 heat resistance, and good adhesion to web paper, we found that EVAO saponified products (hereinafter referred to as HEVA) with a degree of saponification of 50% or more were found. ) or its ~boxy~ modified product (hereinafter referred to as C-HEVA)
By using a hot-melt adhesive with a base polymer of 74-μter plug paper to bond the wrap portion of the web of the 74-μter plug, there is extremely little change in the adhesive strength of the wrap portion over time. We succeeded in manufacturing a cigarette filter plug with a small amount of hot melt adhesive attached to the rotary knife.

That is, the present invention provides that the wrap portion of the web is made of (a) a saponified ethylene/vinyl acetate copolymer (HIVA) having a degree of saponification of 50% or more or its carboxylic V/lzf K;
(b) 15 to 200 parts of tackifier and (c) 30 to 300 parts of wax per 100 parts of (C-HIVA)
A cigarette filter plug glued with a hot melt adhesive containing

The HEVA used as the adhesive component of the present invention is usually Q
Saponification operations, such as hydrocarbons' A bath (benzene, toluene,
/(methanol, ethanol-/1/, propyl alcohol-p
etc.) in the presence of an alkali (sodium hydroxide, potassium hydroxide, sodium methylate, etc.). EVA has a melt index (hereinafter referred to as MI, measured at 190° C. and 2160 f) of 10-400 f/10 m1n, and has a vinyl acetate content of 5 to 50% by weight.

It is essential that the degree of saponification of the HEVA thus obtained is 50% or more, and if it is less than this, the amount of hot melt adhering to the rotary knife will increase, which is not preferable.

It can also be obtained by heating C-HEVAijHE4A and an unsaturated ρ acid or its anhydride together with a radical initiator to a temperature higher than the decomposition temperature of the radical initiator. Unsaturated carboxylic acids or their anhydrides include unsaturated monocarboxylic acids such as acrylic acid and methacrylic acid; Examples include μ bonic acid or its anhydride, generally 0.1 to 5
It is possible to use those reacted on the order of % by weight.

Examples of tackifiers that can be used as adhesive components of the present invention include rosin granules, terpene phenol/1
/Category 9 petroleum resins and modified products thereof. Furthermore, examples of the wax include paraffin wax and microcrystalline wax.

A more preferable blending ratio of these components is HEVA
Or 30 to 30 parts of tackifier per 100 parts of C-HEVA
100 parts and 40 to 150 parts of wax.

The hot melt adhesive used in the present invention may further contain an antioxidant, a filler, or a polyolefin compound such as EVA or ethylene-ethyl acrylate.

The Holatome/1/) adhesive used in the present invention can be produced by mixing the respective components and then kneading them in a hot melt mixer such as a router or a kneader.

In the production of cigarette filter plugs, Hola [melt adhesive is usually melted by heating to 160 to 180°C in a melting tank attached to a filter plug M6 machine, and quantitatively passed through a heated hose using a pump to reduce the diameter to 2- The rail 9 is applied in a line approximately at the center of the inner surface of the paper web, and the wrap glue is applied to one of the lap parts of the paper web.

The filter material, which is formed into a rod shape in the garniture (winding tube part) of the plug manufacturing machine, is rolled up with paper, and after the wrap part is attached and sealed, the wrap part is strongly reheated and crimped with a part of the heater, and then After being cooled and crimped by a portion of the cooler and completing the adhesion process for the lapped portion, it is cut into a predetermined length at the cutting portion. The tape speed of garniture tape for forming winding is usually 100 to 400 tn/
Min, Adashi, 300-'400 in recent years? IZ
/min high speed machines are often used.

Cigarette filter plugs manufactured in this way have a storage period at the filter manufacturer, cigarette manufacturing factory
After being transported to Japan and stored at the same factory, it is supplied to a filter-equipped cigarette manufacturing machine, where it is first cut to twice the length of the product's filter tip using a filter tip attachment machine. A rotary knife (1400-1800L) is attached to both ends of the cigarette.
a1 rotation/min,), cut into two equal parts, 2500
Filter cigarettes are produced at a high speed of ~4000 cigarettes/min. The performance of the hot melt adhesive used as a glue when manufacturing cigarette filter plugs is not related to the strength of the peeling layer on the wrapping paper, but it depends on the amount of hot melt adhesive attached to the rotary knife and the It directly affects the adhesion between the filter material and the web. Holatome used in the present invention, A
/) Adhesives have excellent cohesive strength and heat resistance, and also have good adhesion to paper webs, so they are suitable for use in adhesives. In addition, hot-melt gravure-coated paper, which has recently been used as the web for filter plugs, has the inner surface of the web coated with a hot-melt adhesive in advance, and the web is heated during the plug manufacturing process to apply the hot-melt adhesive.
fr: This is used to bond the molten strip, the wrap portion of the web, and the space between the web and the filter stack.
A hot melt adhesive having (C-HEVA) as a base polymer can be suitably used.

Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples. The test items in Examples and Comparative Examples were conducted in the following manner.

1), u-engineering Conforms to A8TM D-1238-65'l'.

2) Softening point ring and ball method (according to TA Engineering 1-1980) 3) Bath melt viscosity cycle + li viscometer according to TA Engineering 2-1980.

4) Peel adhesion strength Wrap portion of filter plug web paper (in this example, 2.
6 m width) was measured using a tensile tester under the conditions of 180° peeling, 1 crosshead speed, 150 a/ui, n, and the average value of 10 plugs was shown. The measurement temperature and the sump/l' storage temperature are 20°C.

5) Adhesion of hot-melt adhesive to rotary knife The rotary knife of a fine filter tip attachment machine was tested using a tester exclusively designed for 7 Umirate. As a hot melt adhesive test piece, diameter 5 wI
.

A stick with a length of 50 m was prepared, and the same stick was brought into contact with the surface of a rotary knife (14301Ei 1 turn/min) of a tester for 20 seconds at a load of 30 f, and the weight of the hot melt adhesive attached to the knife surface was measured. . Two types of rotary knives were used: an SK knife and a carbide knife, and the surface temperature of the L1 knife was kept at 40°C and 50°C and measured.

Example 1 fil 5 Q a <Nippon Zeon Co., Ltd., C5 thread petroleum tree modified product) 25 parts and paraffin wax 150
A cigarette filter plug t-iJMjd was made in the following manner using Holatome J) adhesive obtained by melt-mixing 30 parts of ``F'' (Nippon Seiro Co., Ltd.).

Using a filter plug manufacturing machine (model KDF-2/AF-1, manufactured by Hauji Co., Ltd.) with a tape speed of 40Q ng/min, the hot melt adhesive prepared above was poured into a dissolving tank and a hole/C''/L. /(diameter 2-) temperature gold 1
The cellulose acetate tow was rolled up on the wrapping paper with low air permeability, and the coating amount was 49/1 plug at 80°C.
After passing part of the cooler, cut it to a length of 102 mm.
- A filter plug with a circumference of 24.4 m was obtained. The test results for the filter plugs obtained here are shown in Table 1.

Table 1 As is clear from the results in Table 1, the HKVAt of the present invention
- For hot melt adhesives based on polymers,
The amount of hot melt adhesive attached to the rotary knife is 1
It is as small as ~3q. In addition, the peel adhesive strength of the wrapped part of the plug paper has little deterioration over time, and even after 6 months, it remains 18 g.
In contrast, in the case of hot melt adhesives based on EVA'i, a large amount of hot melt adhesive adheres to the rotary knife, and the peel adhesion strength of the wrap portion of the plug web paper is low. Deterioration over time has been remarkable, and the value has decreased to 5f or less within 5 to 6 months.

Comparative Example 1 Example 1 except that 45 parts of EVA with a vinyl acetate μ content of 28% by weight (M process 1 50F/10 min, ) was used instead of 90% saponified EVA as a component of the hot melt adhesive. Table 1 shows the test results for a 74μ tar plug obtained in the same manner as above.

Examples 2 to 5 and Comparative Example 2 Table 2 shows test results for filter plugs obtained in the same manner as in Example 1 except that hot melt adhesives having the compositions shown in Table 2 were used.

(Margins below) 15- = 16- *1) An1j A modified VLV product made by reacting HEVA with 0.5% by weight of acrylic acid.

As is clear from Result 1 in Table 2, in the case of the Holatome/L') adhesive using the HEVA'i base polymer with a saponification degree of 50% or more used in the present invention, the Holatome/L') adhesive to the rotary knife is A/) The amount of adhesive deposited is small at 2 to 5wv, and the peeling adhesive strength of the lapped portion does not change over time. The amount of adhesion to the rotary knife has increased significantly.

Manuscript supplementary book (,.

July 2, 1980 Commissioner of the Japan Patent Office 2 Name of the invention Tobacco filter plug 3 Relationship to the case of the person making the amendment Patent applicant (731 Debuka U.S.) Address 2-27 Doshomachi, Higashi-ku, Osaka Address Name (293) Takeda Pharmaceutical Co., Ltd. Representative Iku Kurabayashi 4th Department Address 6, Takeda Pharmaceutical Co., Ltd. Osaka Factory, 2-17-85 Jusohonmachi, Yodogawa-ku, Osaka City, Contents of Amendment (1) No. Change "partial width)" on page 4, line 9 to "partial width or less)"
” he corrected.

(2) Correct "glue" on page 5, line 9 to "hot melt adhesive."

(3) On page 6, line 9, ``1 metamorphosis'' is corrected to ``transformation''.

(4) Correct "diameter" on page 9, line 12 to "discharge port diameter."

(5) r (C-HEVA)J or ifc on page 11, line 11 is corrected to C-4EVAJ.

(6) On the 200th line of the same page, correct "TA Engineering" to r, TAIJ.

(7) On page 12, line 2, 1, correct "TA engineering" to "JA engineering".

(8) Change “low air permeability” to “high air permeability” on page 13, line 19.
Correct.

(9) On page 18, line 5.6, "metamorphic body" is corrected to "metamorphic body".

that's all 2-

Claims (2)

[Claims] (1) The wrapped portion of the web is (a) a saponified product of ethylene/vinyl acetate copolymer with a degree of saponification of 50% or more or its strength〃Phoxyl modified product 100
Tobacco filter plug glued with a hot melt adhesive containing: (b) 15 to 200 parts of tackifier and (c) 30 to 300 parts of wax. (2) The fixed part between the roll paper and the filter material is (&)
For 100 parts of a saponified product of ethylene/vinyl acetate copolymer with a saponification degree of 50% or more or its μ boxyl modified product, (15 to 200 parts of tackifier and (c) cao to aoo parts of wack) are added. A cigarette filter plug according to claim 1, which is bonded with a hot melt adhesive containing a cigarette filter plug.