CA1142038A - Pressure sensitive adhesive composition and adhesive tape for tying prepared therefrom - Google Patents
Pressure sensitive adhesive composition and adhesive tape for tying prepared therefromInfo
- Publication number
- CA1142038A CA1142038A CA000332605A CA332605A CA1142038A CA 1142038 A CA1142038 A CA 1142038A CA 000332605 A CA000332605 A CA 000332605A CA 332605 A CA332605 A CA 332605A CA 1142038 A CA1142038 A CA 1142038A
- Authority
- CA
- Canada
- Prior art keywords
- tape
- adhesive
- tape according
- self
- styrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J121/00—Adhesives based on unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Package Frames And Binding Bands (AREA)
Abstract
ABSTRACT
The present invention provides an adhesive composition and a tape prepared therefrom having a weak adhesiveness to the other surfaces, but showing a strong self-adhesiveness making a strong bonding between tapes themselves when overlapped the faces having the adhesive layer thereon, and is very suitable for use of tying a bundle of vegetables and flowers etc. which are soft and susceptible of damage when unbinding the tape thereon.
The present invention provides an adhesive composition and a tape prepared therefrom having a weak adhesiveness to the other surfaces, but showing a strong self-adhesiveness making a strong bonding between tapes themselves when overlapped the faces having the adhesive layer thereon, and is very suitable for use of tying a bundle of vegetables and flowers etc. which are soft and susceptible of damage when unbinding the tape thereon.
Description
~9L2~38 TI TLE OF THE INVENTI ON:
Pressure sensitive adhe~ive composition and adhesive tape prepared therefrom BACKGROllND OF THE INVENTION s Heretofore, for tying vegetables and the like, adhesive tapes formed in the following manners have been used:
(A) a pressure sensitive adhesive is applied to one end of the surface of the base film and the other end of the back of the base film. At the time of tying, both .
ends are overlapped together and the adhesives at the ends of the tape are then bonded together to make a fixed tie;
(B) a pressure sensitive adhesive is applied onto the whole surfac~ of the base film and on the back of the base film at.regular intervals and, at the time of : .
tying, overlap together the adhe.Qives on both sur~aces of the tape to make a fixed tietl and (C) a pressure ~sensitive adhesive i8 applied to both surfaces of .~the entire base film and at ~he time o~
~ying, the adhesives on the both surfaces are bonded.
However, ~he pressure sensitive adhesives used on this type of adhesive tape show a strong self-adhesivity, that i5, there is a strong bond between the surfaces on which adhesives have been applied, but it does not adhere to oth-er types of;surfaces.
Therefore, for ~uch forms of adhesive tape the adhesive~
applied to the surfaces for bonding are totally ineffective.
In the case of the tape on which adhesives are applied to the ends thereof, such a in case (A) mantioned above, many kinds of tapes of different lengths must be prepared, these lengths varying according to the type of materials to be bonded as well as the volume of the materials to be bonded in one bundle, but i~ is very troublesome to prepare such a variety of tapes. Moreover, with such tape, the bonding process cannot be carried out smoothly by a tying machine.
In such adhesives having a high self-adhesivity, the adhesive layers can be bonded to each other, but do not adhere to the other materials such as the surfaces of the tied material. Therefore, in the case of tying vegetables, the vegetables are tied by bonding the ends of the adhesive layer of the tape, but the tape does not adhere to the vegetable.
The tapes cannot be held stationary onto the outer surface of the vegetable and the tapes may often slip out of position and the vegetables may thus fall out.
Although it is thought that tying up of vegetables strongly would prevent such accidents, this method has shown such defects that, as a result, the vegetables are smashed or then the tapes are become cut when it is tied too strongly, the commercial value of the vegetables is severely reduced.
SUMMARY OF THE INVENTION:
According to the invention there is provided a pres-sure sensitive adhesive tape for bundling vegetables or flowers, comprising a waterproof substrate coated on one side only with a substantially continuous coating of an adhesive composition comprising: 100 parts by weight of an elastomer consisting of st~rene-isoprene-styrene block copolymer or a mixture of styrene-isoprene-styrene block copolymer as the principal ingredient and another 3~3 elastomer as an auxiliary ingredient selected from styrene-butadiene-styrene block copolymer, natural rubber, polyi50-butylene and butyl rubber; 20 to 150 parts by weight of a thickener selected from polyterpene, rosin ester, petroleum resin and mixtures thereof; and 0 to 150 parts by weight of additives; the tape having an adhesive strength of 100-700g/20mm width and a self-adhesive strength of at least 1300g/20mm width.
Other aspects of this invention are claimed in a divisional application.
The composition has a fæ~338 -~ suitably weak adhesion to other substances and a strong adhesion to itself~ i~eO it has a weak adhesire strength and a strong self-adhesive streng~hr For example, i an adhesive tape whose adhesive is prepared from the above mentioned composition, the adhesive tape will adhere weakly to the tied materialO In fact, ~he adhesion is so weak that the tape can be easily peeled of~ without inflictiny any damage to the tied material. However, it provides strong self-adhesiveness between the two ends o~ the tape wound around the material, ~o that it foxms a safe and steady way of tying goods.
The pressure sensitive adhesive tape prepared from the composition mentioned above is also within ~he scope of this invention. me tape can conduct a tying procedure by a tying machine using the same tape with appropri-ate binding pressu~e regardless of the size of bundle to be tiedO After binding, the tape is lightly bonded ~o the tied material such as vegetables, and the ends of the tape are ~trongly bonded together. m erefore the tape cannot slide out during transport or handling of ~he goods. At the same time the goods do not fall out and a sure and safe tying can be achieved by the appropriate binding method.
When untying, the tape can easily peel of~ the vegetables without any damage to them. Furthermore the tape of the instant invention has a characteristic that, even when the tied vegetables are dipped into water to cleanse them and the vegetables swell and become bi~ger, the binding will not be loosened becauRe of the good creep resistance of the tape, derived from the creep re~istance of the a~esive composition.
~ 4 -~' .
An advantage of the invention, at least in preferred forms, is that it can provide a pressure sensitive adhesive composition which has a weak adhesiveness and a strong self-adhesiveness.
Another advantage of the invention, at least in preferred forms, is that it can provide a pressure sensitive adhesive composition coating an improved creep resistance.
A further advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape for tying by having the said composition on one ` surface of a tape.
Still another advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape having a weak adhesive property and a strong self-adhesive property, prepared from the said composition.
Still another advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape for tying vegetables and flowers, having an improved creep resistance.
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig. 1 is a perspective view of the tape of the invention. Fig. 2 is a sectional view cut along line II -II of Fig. 1. Fig. 3 is an explanatory schematic view showing the condition of the tape of the invention as it is being used.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS:
The present invention relates to a pressure sensitive adhesive composition which comprises, as main components, 100 parts by weight of elastomer, about 5 to 150 parts by weight of thickener, 0 to 40 parts by weight of other ~olymer and, if necssaryr 0 to about 150 parts by weight of F
~ 3 ~
additives, and has a weak adhesive property and a strong self adhesive property, and further,to a pressure sensitive adhesive tape prepared from the said composition.
~t first, a discussion will be made about th~ tape with reference to the attached drawings. To one surface of the base material (1) is applied a pressure sensitive adhesive layer (2) having a weak adhesive property and a strong self-adhesive property. Th~ base material (1) has good water reSi~tance~ and is p~ef~rably printable, and à film o~ polypropy~ene, polyethyle~e, unplastisized PVC, polyester and the l~ke is preferably used as the base ;
material The base ilm preferably,has a thickness of about 20 to about 60~ , but a film having t~ickness outside this range can be used depending on the purpose for which it is used. F~rthermor~e,the commercial value of the tape will be raised, if the basic film is class~fied with respect to the kind of the g~ods to be tied or ~he name of ~he produc-tion place, or collecting date etc. printed ~hereon.
As seen from the above, the tape!of the invention is suitable for the use in tying variousikinds of goods, especially for lea~ and root vegetabl~s, flowers and ~he likè. The`tape is also suitable for the use as a protecting tape or packing tape for various kinds of goods. Howe~er, the following dis~ussion will be madelconcerning a tape ~or tying vegetables and flowers. merefore atten~ion should be drawn to the fact that an expl~nation for khe use foi tying vegetables ~r flowers will be made in the following pages bearing in mind the fact that the tape can also be used for other applications such as mentioned above.
- 6 - , , The pressure slnsitive adhesive layer ~2~ having a ueak adhe6iveness a~d a strong sel~ad~esiYeness formed on the base film (1) reveal~ an adhesive s~rength o~ about ¦ 100 to 700 g per width of 20 mm (i.e. an adhesive strength obtained by contac~.bonding the adhesive tape on a steel plate under the pressure o~ 2 kg/cm2,), and a ~elf-adh~ive stre~gth~auto-adhes~ve ~trength) over 9t~0 y/20 mm wid~
.ii.~. an auto-adh~ive streng~h obta~ned after 10 minu~es from bonding together the adhesive faces of the pressure sensitive adhesive ~ape). If ~he ~ppç has a too high ,.
adhesive streng~h ~d the ~ape is u~ed to tie up a soft vegetàble ~uch as(s~inach, the adhesi~e tape adheres strongly to the ~id leaf vegetable3 and the vegetable . will be damaged, ~hù3 lowering it~ ~o~ercial value :when ~he tape.is removed~from the. vegeta~le.
me;~ela~tome~ Nsed on the present adhesive~l~ayer ~
~elected from the.g~oup consis~ing o~,natural rubber, . , synthetic rubber such as butyl rubber (~or example, Butyl No. 268, Esso Standard Petroleum Co.), polyisoprene rubber and block copolymer such as styrene-isoprene-styrene block copolymer or styrene-butadiene-styrene block copolymer and blended mixtures thereof.
The pressure sensitive adhesive layer composition further contains about 5 to 150 parts by weight of thickener, ~5 about 0 to 40 par~s of relati~rely low molecul~r weight;
polymer having a ~ood compatibility with the abovQ ela~tomer ,and i~ necessary,.~ additives of 0 to ~;50 part~ by weight, per 100 part~ by weight of the ela~tomer.
For the ~ai~ polymer, polyisobu~lene (m~lecular weight of about 7,000 to 20,00û) and polybu~ene (mole:cular weight t ~ - 7 -3~3 of about 1,000 to 10~000) are used.
For thickener, polyterpene, rosin ester and petroleum résins and mixtures ~ereof are used. Among them, such are ccmmercially avail-able, for example, polyterpene having a softening point of 100C or more, rosin ester and petroleum resin. For example polyterpene such as Quintone ~ A 100, D 100, D 200, C 100, C 200 S of NIPPON ZEON Co., Ltd., alicyclic hydrocarbon such as Ar~on ~ P 100, P 115, P 125 of Arakawa Chemical Industry Co., Ltd.V hydrogenated hydro-carbon resin such as Escorez ~ 5300 and 5320 of EssoChemical Co., Ltd., isoprene hydrocarbon resin such as Escorez ~ 1304, 1310 and 1315 of Esso Chemical Co., unsaturated hydrocarbon resin such as Escorez ~ 1202 of Esso Chemical Co. and hydrocarbon resin such as Tack-Ace ~ A 100 of Mitsui Petrochemical Industries, Ltd.
These thickeners are used in an arnount varying from about 5 to 150 parts by weight alone or in combinationO
The use of the thickener outside this range lowers the self-adhesiveness and creep resistance and adversely influences the capacity of a tape for tying.
An additive is added to the composition to give an adequate control on cohesiveness and self-adhesiveness.
For example, calcium carbonatev zinc oxide, titanium oxide, vegetable oil or modified vegetable oil (castor oil, colæa oil, soybean oil and Factice ~ etc.), mineral oil or mcdified mineral oil, paraffinic or aromatic process oil (for example, Flexon ~
765, 110, 112 and 876 of Esso Chemical Co.) and mlxtures thereof, poly-butene, liquid polyisobutylene, or polyterpene having a softening point of 20C or lower are illustrative. When using the additive in an amount over 150 parts by weight, cohesiveness and self-adhesiveness are ill-balanced, and result in a bad initial ~!
adhesiveness and make the instantaneous strong bond un~ure.
~mong these addi~ives, the one in liquid ~tat~ i~ used in an amount ôf 20 parts by weight or less in order to gain a balanced cohesiveness.
me adhesive composition thus prepared is coated on one sur~ace of the base material, d~ied and wound up in order to prepare aniadhesiv~ tape. ~
The adhesive composi~ion is ordinarily coated in a thickness of about 5 to 30~ in dry state. Before coating a primary txeatmen~ is preferably made on the basic film according to the conventional manner such a~ coating a primer layer etc.
The pressure sensitive adhesive forms a weak adhesive layer having a low polarity, but has a strong adhesiveness betwe~n ~he adhesive layers itself. Therefore the adhesive tape has its distinctive feature in its weak adhesiveness and strong self-adhesiveness which are very different from those of the conve,ntional rubber- or acrylic-adhesives.
When the adhesive tape of ~he in~ention whlch ha~ a ~0 weak adhe~iveness and a ~trong self adhesivenes~ i~ used to tie up vegetables, a sure and stable bundle is obtained, and this tie-up will not be loosened in the course of handling and never let the vegetable~ 81ip out from the tied;bundle, but it will also giYe no damagP
to the vegetables when the tape is peeled o~f~ bscause the tape does not adhere strongly to the ~egetables. Because the tape has its adhesive layex on only ons sur~ace thereo, mechanical tying can be easily and e~ficiently carried out by using an adhesive tape roll, regardless of ~he size of the bundle to be tied~ There~ore, be~auss lt i8 unnecessary, g_ , 3 ~3 -as in the case in the conventional method, to prepare several lenyths of tape~ the ~ape of the invention can be used to tie up different and ~arious kinds of gooda using only one kind of tape, thus it i8 ~ery efficie~t and economical.
When an adhesive tape is used ~o bundle up vegetables ox flowersr slipping or peeling off,of the tape often occurs, when the tied good3 expand its volume, for example, when the vegetables or flowers are immersed into or sprayed with the water to cleanse or freshen them. Accordingly, the tape ~hould have good creep resistance under a cons~ant load, in order to resist expansion of ~he volume expanding due to the water-absorpt~on by the vegetable.
Furthermore, in the oase of bundl~ng ~egetables with the tape in the process of tying with a tying machine, an instantaneous ~ixed bonding shouldJbe secured between the adhesives on ~he tape to ensure.a sure bonding o vegetables to withstanLd the expansi~n of the vegetable~.
In order to evaluate 'quantitatively the ab~ve physical properties with which 'such adhesive.tapes are'endowed, the inventors provided several ~pecific d~finitions ~or thesLL L ' properties and me~hod for meas~ring these proparties which ~L are 'defined as follows and used thro~ghout the speci~ication.m e "initial adhesi~e strenLgth~ is defined as such a strength that aft~r a smooth edged ~urface o~ a metal rod having diameter of 5 mm comes into contact with the sur~ace of the'adhes'ive tape for 1 second under a load o~ 100 g at 20C under a relative humidity o~ 65 %, the initial adhesive strength is measured as a peeling resistance obtained by peeling the adhe~ive tape at a peeling veloci~y of 10 mm per second~see ASTM Special 'rechnical Publ~cation No. 360). J
~i The "adhesive strength" is such strength that, after press adhering the adhesive tape with a width of 20 mm on a stainless steel panel by a roller having a weight of 2 Kg and folding the idle surface back onto the panel surface at an angle of 180, the adhesive strength is obtained as the peeling resistance obtained by peeling off the tape at a peeling velocity of 300 mm per minute.
mis methbd is set~led according to ~IS-Z.1522.
The "self-adhesion" i~ ~uch mea~ure that, after sticking together in the center parts of a length of 25 mm ~he adhesive faces of an adhe~lve tape piece having a width of 20 mm, and a length of about 15 cm wi~hout getting out of position and pres~-adhere the adhe~ive p-art~ w~th a roller having a weight of lKg, a re~i~tance which i~ obtained by peeling of the non-adhered end ofi th~ tape piece at an angle of 180 at a peeling velocity of 300~mi~ measured as self-adhesion.~ me "~lf-adhesion keeping strength" iB
such a measure that, after ~oining toge~her the adhesive faces of parts of an adhesive tape piece with a width of ~0 mm and a length of 15 cm in abou 25 mm.length without them getting out of the position, fixing one free end of the ' tape pieces, the resistance is measured by puttlng a load having a weight of 500 g on the other ~ree end of the tape and leavin~ it to stand as it is for one hour at 20C under a relative humidity o~ 65 %,and after measuring ~he peeling length which the self-adhe~ion strength i~ compared.
3~y measuring the physlcal properties o~ the pre~ent tape according to the method mentioned above, the following results are obtainedO This property is measured in order to determine ~he creep-re~istance o the present tape~
~2~3~
Table 1 Initial adhesive strength (g/5 mm diameter) : 200 - 700 Adhesive strength (g/20 mm width) : 100 - 700 Self adhesive strength (g/20 mm width) : > 900 Self adhesion keeping strength (mm/20mm 500 g.hr) : 0 - 7 The corresponding properties are measured for some commercially available tapes, espcially for packing tapes.
The results are shown in Table 2.
l33~3 . ~ _ ., ... .. _ __ . ...
o ~ ~ *
u~ o ;~ ~ ~ ,~
_ ~ _l ,~ ,~ ,1 -- rl ~: ~ ~ ~
a~ X U~ ~
. .
~ o o o o ~ o o ~ o o " ~ o Lr~ o o U~ o C:~ o 1 o o~ o a~ ~ ~ o ~ ~ a~
;~ ~ ~ 3 _I ,~ ,, ,_; ,.
____ ~
,~ ~
U~ ~ o ~ o o C~ ~ ~ o o o. C~ o a~ Q) ~ rl ~ U') t~ ~ Q {~ (~
;~ Sl~ 3 U~
~ ~1 _ . I ~ . .. .
Q)~
~ ~ OO OOOO
-~J ~ a) ).0 a~ U-1 0 0 11 ~1 H .¢ U~--' _i , _ , ~, _ _ E~
~ O ~ O O O O ~ O O
~ ~ g ~ 8 V ~, -o .. _ _ . ~. _ ... , . o o o n o c~ o o o o o ~ o c:~ o ~ o u~ .
~ U u~ u~ ,o~
~ ~ h ~:: O ~
v ~ 5 8 5 8 ~ 2 ~ ~
U~ ~ ~ H al n~ 0 n~ O ~ a O ~
~1 a) ~ ~ z u~ P. z P~ 14 0 . I ~ rl ~'I
;~ ~ ...
l9S O _ . _ ~
~2~3~
The invention will be explained by way of th~ Examples i~ the following only for illu~tration w~thout any intention to impose limi~ations on the inven~ion. It should be understood that the invention shsuld be construed on the basis o~ the appending claim~.
T~ each of pressure sensitive adhe~ive componen 8 blended as shown in Table 3, was added a mixed 801vent with n-hexane and toluql mixed in a ratio of 1 : 1, in a compo~ition concentration o~ lS %. The soiutions were coated in a conve~tional method on basic films and dried to obtain adhesive t?pes. The adhe3ive stxe~gths and ~el~
adhesive strengths were then determined. . The resul~s ara shown in T~ble 30 - 14 _ - -- - - - ------I~ o u~ In u~ o u~ o o o ,_ ~1 ~ ~ ~ ~
~D U~ In ~ u~ ~ O ~ o ~ ;` ~ ~ u~
u~7 o ~ ~ o o o c~ o o ~
~ ~ ~ ~ ~ _~ _l u) ~ ~ ~r ,~ o ~1 ~ u~
~ O N O ~ C~O
~0 ~o U~ ~
00 00 . O O Ct~ O
~1 00 O ~0 O O O. O
o o e~ a~ o o o a~ ,~ ~ ~ u~ '-D o t~ 0 ~ _1O C~ O
r- o ~r ~u~ ~1 1~' ~D _~ ~0,0~U~ Ct) ,e ~'~
E~ u~ o ~o~ ~ o o ) O ~ t~ O ,~
u~ O ~ ~
` ~ oo ~ r~l n ~ ~ In ,., ~1 OU~ ~1 ~ O O ~
-- a --- --~
. ~ c a~8 0 ~-3.~-3'o.~3 ~ 9~
o~l 15 3~
.~ ~a ~1~ ! polyp~o~/ene~
f~L On one side of the-}~ film having a thickness of 40 ,u, were coated the various adhe~ive compo~itions shown in Table 4 and dried to obtain adhesive tapes with adhesive layers having a thicknes~ o 20 11. The prop~rl~ies of the tapes were then mea~ured, me re~ults are shown in Table 4u i f :~ , .
:
Z~3~3 . _ _ . ~ o o ~ ô u~
O o ~ ~ ôo o~
~ o o o o o ~
CO o CO ~o~ ,~ooc~ . .
,, I U~ U~ U~ C, o ~; _1 00 _ 07 _~ C:~ O o O
(~ O 0 ~0 O 00 O
a~ oo ~-D ~ o O 0'0 ~ OO O U~ 1" "''.
N O O O O O O O O O O
q~ ~-1 ~t ô U~ ~
~ O O ~ 1n O00'' ~ .
~ O O O O O O O O O
~1 _1 ~ Ul1~ U) CO O O O ~0 'o O, O O O O
. ._ . . , ~ N
~ 00 ~ ,n o D ~} S L~ u ~ i~ S
E~:~
On a polyester film having thickness of 25 ~, was coated a composition ~hown in Table 5, and then dried to obtain an adhesive tape having an adhesive layer with a thickness of 25 ~. The properties of the obtained tape are shown in Table 5O
Exa_ple 3~
On an unplasticized PvC film, was coated an adhesive composition shown in Table ~, and dried to ob~ain an adhesive tape having an adhesive layer with a thickness of 20 ~. me properties of the tape are shown in Table 5.
Table S
~ . .
Example No.
_ __32 33 Adhesive Composition .
Petroleum resin 50 50 Polyterpene ~ 10 CaC03 10 Titanium oxide 50 Mineral and vegetable oil and modified oil thereo~ 30 .. . _ _ _ Properties Initial adhesive strength500 600 (g/5 mm diamet~r) Adhesive strength 600 500 (g/20 m~.wqdth) Self-adhesive strength1,600 1,500 (g/20 mm wldth Self-adhesion keeping 0 O
property (mm/20 mn 500 g.hr) . . .. ~ ., _ 1 8 ~-~2~3~3 Example 34 An adhesive tape was prepared by coating the adhesive compositions on polypropylene films as shown in Table 6.
S Using the tape, two bundles of spinach, having a weight of 250 g each, were tied up with a sel~-bonding length between tape ends of 17 mm. Immersing the bundled spinach into water, the length of the self bonded parts of the tapes which peeIed off in the course o~ time were ~hen measured. The results are ~hown in ~ble 6.
Table 6 . . ... . ........ _ _ Composition Elastomer SIS 100 parts mickener (Quintone A-100~30 parts Additive (Factice) 60 part~
, Peeling off of thë
bonding part 70 min. latex 0 120 min. later 0 220 min. later 0 17 hours later 6 mm . . .. .~ . , .
-- lg -.~
. .
Pressure sensitive adhe~ive composition and adhesive tape prepared therefrom BACKGROllND OF THE INVENTION s Heretofore, for tying vegetables and the like, adhesive tapes formed in the following manners have been used:
(A) a pressure sensitive adhesive is applied to one end of the surface of the base film and the other end of the back of the base film. At the time of tying, both .
ends are overlapped together and the adhesives at the ends of the tape are then bonded together to make a fixed tie;
(B) a pressure sensitive adhesive is applied onto the whole surfac~ of the base film and on the back of the base film at.regular intervals and, at the time of : .
tying, overlap together the adhe.Qives on both sur~aces of the tape to make a fixed tietl and (C) a pressure ~sensitive adhesive i8 applied to both surfaces of .~the entire base film and at ~he time o~
~ying, the adhesives on the both surfaces are bonded.
However, ~he pressure sensitive adhesives used on this type of adhesive tape show a strong self-adhesivity, that i5, there is a strong bond between the surfaces on which adhesives have been applied, but it does not adhere to oth-er types of;surfaces.
Therefore, for ~uch forms of adhesive tape the adhesive~
applied to the surfaces for bonding are totally ineffective.
In the case of the tape on which adhesives are applied to the ends thereof, such a in case (A) mantioned above, many kinds of tapes of different lengths must be prepared, these lengths varying according to the type of materials to be bonded as well as the volume of the materials to be bonded in one bundle, but i~ is very troublesome to prepare such a variety of tapes. Moreover, with such tape, the bonding process cannot be carried out smoothly by a tying machine.
In such adhesives having a high self-adhesivity, the adhesive layers can be bonded to each other, but do not adhere to the other materials such as the surfaces of the tied material. Therefore, in the case of tying vegetables, the vegetables are tied by bonding the ends of the adhesive layer of the tape, but the tape does not adhere to the vegetable.
The tapes cannot be held stationary onto the outer surface of the vegetable and the tapes may often slip out of position and the vegetables may thus fall out.
Although it is thought that tying up of vegetables strongly would prevent such accidents, this method has shown such defects that, as a result, the vegetables are smashed or then the tapes are become cut when it is tied too strongly, the commercial value of the vegetables is severely reduced.
SUMMARY OF THE INVENTION:
According to the invention there is provided a pres-sure sensitive adhesive tape for bundling vegetables or flowers, comprising a waterproof substrate coated on one side only with a substantially continuous coating of an adhesive composition comprising: 100 parts by weight of an elastomer consisting of st~rene-isoprene-styrene block copolymer or a mixture of styrene-isoprene-styrene block copolymer as the principal ingredient and another 3~3 elastomer as an auxiliary ingredient selected from styrene-butadiene-styrene block copolymer, natural rubber, polyi50-butylene and butyl rubber; 20 to 150 parts by weight of a thickener selected from polyterpene, rosin ester, petroleum resin and mixtures thereof; and 0 to 150 parts by weight of additives; the tape having an adhesive strength of 100-700g/20mm width and a self-adhesive strength of at least 1300g/20mm width.
Other aspects of this invention are claimed in a divisional application.
The composition has a fæ~338 -~ suitably weak adhesion to other substances and a strong adhesion to itself~ i~eO it has a weak adhesire strength and a strong self-adhesive streng~hr For example, i an adhesive tape whose adhesive is prepared from the above mentioned composition, the adhesive tape will adhere weakly to the tied materialO In fact, ~he adhesion is so weak that the tape can be easily peeled of~ without inflictiny any damage to the tied material. However, it provides strong self-adhesiveness between the two ends o~ the tape wound around the material, ~o that it foxms a safe and steady way of tying goods.
The pressure sensitive adhesive tape prepared from the composition mentioned above is also within ~he scope of this invention. me tape can conduct a tying procedure by a tying machine using the same tape with appropri-ate binding pressu~e regardless of the size of bundle to be tiedO After binding, the tape is lightly bonded ~o the tied material such as vegetables, and the ends of the tape are ~trongly bonded together. m erefore the tape cannot slide out during transport or handling of ~he goods. At the same time the goods do not fall out and a sure and safe tying can be achieved by the appropriate binding method.
When untying, the tape can easily peel of~ the vegetables without any damage to them. Furthermore the tape of the instant invention has a characteristic that, even when the tied vegetables are dipped into water to cleanse them and the vegetables swell and become bi~ger, the binding will not be loosened becauRe of the good creep resistance of the tape, derived from the creep re~istance of the a~esive composition.
~ 4 -~' .
An advantage of the invention, at least in preferred forms, is that it can provide a pressure sensitive adhesive composition which has a weak adhesiveness and a strong self-adhesiveness.
Another advantage of the invention, at least in preferred forms, is that it can provide a pressure sensitive adhesive composition coating an improved creep resistance.
A further advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape for tying by having the said composition on one ` surface of a tape.
Still another advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape having a weak adhesive property and a strong self-adhesive property, prepared from the said composition.
Still another advantage of the invention, at least in preferred forms, is that it can provide an adhesive tape for tying vegetables and flowers, having an improved creep resistance.
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig. 1 is a perspective view of the tape of the invention. Fig. 2 is a sectional view cut along line II -II of Fig. 1. Fig. 3 is an explanatory schematic view showing the condition of the tape of the invention as it is being used.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS:
The present invention relates to a pressure sensitive adhesive composition which comprises, as main components, 100 parts by weight of elastomer, about 5 to 150 parts by weight of thickener, 0 to 40 parts by weight of other ~olymer and, if necssaryr 0 to about 150 parts by weight of F
~ 3 ~
additives, and has a weak adhesive property and a strong self adhesive property, and further,to a pressure sensitive adhesive tape prepared from the said composition.
~t first, a discussion will be made about th~ tape with reference to the attached drawings. To one surface of the base material (1) is applied a pressure sensitive adhesive layer (2) having a weak adhesive property and a strong self-adhesive property. Th~ base material (1) has good water reSi~tance~ and is p~ef~rably printable, and à film o~ polypropy~ene, polyethyle~e, unplastisized PVC, polyester and the l~ke is preferably used as the base ;
material The base ilm preferably,has a thickness of about 20 to about 60~ , but a film having t~ickness outside this range can be used depending on the purpose for which it is used. F~rthermor~e,the commercial value of the tape will be raised, if the basic film is class~fied with respect to the kind of the g~ods to be tied or ~he name of ~he produc-tion place, or collecting date etc. printed ~hereon.
As seen from the above, the tape!of the invention is suitable for the use in tying variousikinds of goods, especially for lea~ and root vegetabl~s, flowers and ~he likè. The`tape is also suitable for the use as a protecting tape or packing tape for various kinds of goods. Howe~er, the following dis~ussion will be madelconcerning a tape ~or tying vegetables and flowers. merefore atten~ion should be drawn to the fact that an expl~nation for khe use foi tying vegetables ~r flowers will be made in the following pages bearing in mind the fact that the tape can also be used for other applications such as mentioned above.
- 6 - , , The pressure slnsitive adhesive layer ~2~ having a ueak adhe6iveness a~d a strong sel~ad~esiYeness formed on the base film (1) reveal~ an adhesive s~rength o~ about ¦ 100 to 700 g per width of 20 mm (i.e. an adhesive strength obtained by contac~.bonding the adhesive tape on a steel plate under the pressure o~ 2 kg/cm2,), and a ~elf-adh~ive stre~gth~auto-adhes~ve ~trength) over 9t~0 y/20 mm wid~
.ii.~. an auto-adh~ive streng~h obta~ned after 10 minu~es from bonding together the adhesive faces of the pressure sensitive adhesive ~ape). If ~he ~ppç has a too high ,.
adhesive streng~h ~d the ~ape is u~ed to tie up a soft vegetàble ~uch as(s~inach, the adhesi~e tape adheres strongly to the ~id leaf vegetable3 and the vegetable . will be damaged, ~hù3 lowering it~ ~o~ercial value :when ~he tape.is removed~from the. vegeta~le.
me;~ela~tome~ Nsed on the present adhesive~l~ayer ~
~elected from the.g~oup consis~ing o~,natural rubber, . , synthetic rubber such as butyl rubber (~or example, Butyl No. 268, Esso Standard Petroleum Co.), polyisoprene rubber and block copolymer such as styrene-isoprene-styrene block copolymer or styrene-butadiene-styrene block copolymer and blended mixtures thereof.
The pressure sensitive adhesive layer composition further contains about 5 to 150 parts by weight of thickener, ~5 about 0 to 40 par~s of relati~rely low molecul~r weight;
polymer having a ~ood compatibility with the abovQ ela~tomer ,and i~ necessary,.~ additives of 0 to ~;50 part~ by weight, per 100 part~ by weight of the ela~tomer.
For the ~ai~ polymer, polyisobu~lene (m~lecular weight of about 7,000 to 20,00û) and polybu~ene (mole:cular weight t ~ - 7 -3~3 of about 1,000 to 10~000) are used.
For thickener, polyterpene, rosin ester and petroleum résins and mixtures ~ereof are used. Among them, such are ccmmercially avail-able, for example, polyterpene having a softening point of 100C or more, rosin ester and petroleum resin. For example polyterpene such as Quintone ~ A 100, D 100, D 200, C 100, C 200 S of NIPPON ZEON Co., Ltd., alicyclic hydrocarbon such as Ar~on ~ P 100, P 115, P 125 of Arakawa Chemical Industry Co., Ltd.V hydrogenated hydro-carbon resin such as Escorez ~ 5300 and 5320 of EssoChemical Co., Ltd., isoprene hydrocarbon resin such as Escorez ~ 1304, 1310 and 1315 of Esso Chemical Co., unsaturated hydrocarbon resin such as Escorez ~ 1202 of Esso Chemical Co. and hydrocarbon resin such as Tack-Ace ~ A 100 of Mitsui Petrochemical Industries, Ltd.
These thickeners are used in an arnount varying from about 5 to 150 parts by weight alone or in combinationO
The use of the thickener outside this range lowers the self-adhesiveness and creep resistance and adversely influences the capacity of a tape for tying.
An additive is added to the composition to give an adequate control on cohesiveness and self-adhesiveness.
For example, calcium carbonatev zinc oxide, titanium oxide, vegetable oil or modified vegetable oil (castor oil, colæa oil, soybean oil and Factice ~ etc.), mineral oil or mcdified mineral oil, paraffinic or aromatic process oil (for example, Flexon ~
765, 110, 112 and 876 of Esso Chemical Co.) and mlxtures thereof, poly-butene, liquid polyisobutylene, or polyterpene having a softening point of 20C or lower are illustrative. When using the additive in an amount over 150 parts by weight, cohesiveness and self-adhesiveness are ill-balanced, and result in a bad initial ~!
adhesiveness and make the instantaneous strong bond un~ure.
~mong these addi~ives, the one in liquid ~tat~ i~ used in an amount ôf 20 parts by weight or less in order to gain a balanced cohesiveness.
me adhesive composition thus prepared is coated on one sur~ace of the base material, d~ied and wound up in order to prepare aniadhesiv~ tape. ~
The adhesive composi~ion is ordinarily coated in a thickness of about 5 to 30~ in dry state. Before coating a primary txeatmen~ is preferably made on the basic film according to the conventional manner such a~ coating a primer layer etc.
The pressure sensitive adhesive forms a weak adhesive layer having a low polarity, but has a strong adhesiveness betwe~n ~he adhesive layers itself. Therefore the adhesive tape has its distinctive feature in its weak adhesiveness and strong self-adhesiveness which are very different from those of the conve,ntional rubber- or acrylic-adhesives.
When the adhesive tape of ~he in~ention whlch ha~ a ~0 weak adhe~iveness and a ~trong self adhesivenes~ i~ used to tie up vegetables, a sure and stable bundle is obtained, and this tie-up will not be loosened in the course of handling and never let the vegetable~ 81ip out from the tied;bundle, but it will also giYe no damagP
to the vegetables when the tape is peeled o~f~ bscause the tape does not adhere strongly to the ~egetables. Because the tape has its adhesive layex on only ons sur~ace thereo, mechanical tying can be easily and e~ficiently carried out by using an adhesive tape roll, regardless of ~he size of the bundle to be tied~ There~ore, be~auss lt i8 unnecessary, g_ , 3 ~3 -as in the case in the conventional method, to prepare several lenyths of tape~ the ~ape of the invention can be used to tie up different and ~arious kinds of gooda using only one kind of tape, thus it i8 ~ery efficie~t and economical.
When an adhesive tape is used ~o bundle up vegetables ox flowersr slipping or peeling off,of the tape often occurs, when the tied good3 expand its volume, for example, when the vegetables or flowers are immersed into or sprayed with the water to cleanse or freshen them. Accordingly, the tape ~hould have good creep resistance under a cons~ant load, in order to resist expansion of ~he volume expanding due to the water-absorpt~on by the vegetable.
Furthermore, in the oase of bundl~ng ~egetables with the tape in the process of tying with a tying machine, an instantaneous ~ixed bonding shouldJbe secured between the adhesives on ~he tape to ensure.a sure bonding o vegetables to withstanLd the expansi~n of the vegetable~.
In order to evaluate 'quantitatively the ab~ve physical properties with which 'such adhesive.tapes are'endowed, the inventors provided several ~pecific d~finitions ~or thesLL L ' properties and me~hod for meas~ring these proparties which ~L are 'defined as follows and used thro~ghout the speci~ication.m e "initial adhesi~e strenLgth~ is defined as such a strength that aft~r a smooth edged ~urface o~ a metal rod having diameter of 5 mm comes into contact with the sur~ace of the'adhes'ive tape for 1 second under a load o~ 100 g at 20C under a relative humidity o~ 65 %, the initial adhesive strength is measured as a peeling resistance obtained by peeling the adhe~ive tape at a peeling veloci~y of 10 mm per second~see ASTM Special 'rechnical Publ~cation No. 360). J
~i The "adhesive strength" is such strength that, after press adhering the adhesive tape with a width of 20 mm on a stainless steel panel by a roller having a weight of 2 Kg and folding the idle surface back onto the panel surface at an angle of 180, the adhesive strength is obtained as the peeling resistance obtained by peeling off the tape at a peeling velocity of 300 mm per minute.
mis methbd is set~led according to ~IS-Z.1522.
The "self-adhesion" i~ ~uch mea~ure that, after sticking together in the center parts of a length of 25 mm ~he adhesive faces of an adhe~lve tape piece having a width of 20 mm, and a length of about 15 cm wi~hout getting out of position and pres~-adhere the adhe~ive p-art~ w~th a roller having a weight of lKg, a re~i~tance which i~ obtained by peeling of the non-adhered end ofi th~ tape piece at an angle of 180 at a peeling velocity of 300~mi~ measured as self-adhesion.~ me "~lf-adhesion keeping strength" iB
such a measure that, after ~oining toge~her the adhesive faces of parts of an adhesive tape piece with a width of ~0 mm and a length of 15 cm in abou 25 mm.length without them getting out of the position, fixing one free end of the ' tape pieces, the resistance is measured by puttlng a load having a weight of 500 g on the other ~ree end of the tape and leavin~ it to stand as it is for one hour at 20C under a relative humidity o~ 65 %,and after measuring ~he peeling length which the self-adhe~ion strength i~ compared.
3~y measuring the physlcal properties o~ the pre~ent tape according to the method mentioned above, the following results are obtainedO This property is measured in order to determine ~he creep-re~istance o the present tape~
~2~3~
Table 1 Initial adhesive strength (g/5 mm diameter) : 200 - 700 Adhesive strength (g/20 mm width) : 100 - 700 Self adhesive strength (g/20 mm width) : > 900 Self adhesion keeping strength (mm/20mm 500 g.hr) : 0 - 7 The corresponding properties are measured for some commercially available tapes, espcially for packing tapes.
The results are shown in Table 2.
l33~3 . ~ _ ., ... .. _ __ . ...
o ~ ~ *
u~ o ;~ ~ ~ ,~
_ ~ _l ,~ ,~ ,1 -- rl ~: ~ ~ ~
a~ X U~ ~
. .
~ o o o o ~ o o ~ o o " ~ o Lr~ o o U~ o C:~ o 1 o o~ o a~ ~ ~ o ~ ~ a~
;~ ~ ~ 3 _I ,~ ,, ,_; ,.
____ ~
,~ ~
U~ ~ o ~ o o C~ ~ ~ o o o. C~ o a~ Q) ~ rl ~ U') t~ ~ Q {~ (~
;~ Sl~ 3 U~
~ ~1 _ . I ~ . .. .
Q)~
~ ~ OO OOOO
-~J ~ a) ).0 a~ U-1 0 0 11 ~1 H .¢ U~--' _i , _ , ~, _ _ E~
~ O ~ O O O O ~ O O
~ ~ g ~ 8 V ~, -o .. _ _ . ~. _ ... , . o o o n o c~ o o o o o ~ o c:~ o ~ o u~ .
~ U u~ u~ ,o~
~ ~ h ~:: O ~
v ~ 5 8 5 8 ~ 2 ~ ~
U~ ~ ~ H al n~ 0 n~ O ~ a O ~
~1 a) ~ ~ z u~ P. z P~ 14 0 . I ~ rl ~'I
;~ ~ ...
l9S O _ . _ ~
~2~3~
The invention will be explained by way of th~ Examples i~ the following only for illu~tration w~thout any intention to impose limi~ations on the inven~ion. It should be understood that the invention shsuld be construed on the basis o~ the appending claim~.
T~ each of pressure sensitive adhe~ive componen 8 blended as shown in Table 3, was added a mixed 801vent with n-hexane and toluql mixed in a ratio of 1 : 1, in a compo~ition concentration o~ lS %. The soiutions were coated in a conve~tional method on basic films and dried to obtain adhesive t?pes. The adhe3ive stxe~gths and ~el~
adhesive strengths were then determined. . The resul~s ara shown in T~ble 30 - 14 _ - -- - - - ------I~ o u~ In u~ o u~ o o o ,_ ~1 ~ ~ ~ ~
~D U~ In ~ u~ ~ O ~ o ~ ;` ~ ~ u~
u~7 o ~ ~ o o o c~ o o ~
~ ~ ~ ~ ~ _~ _l u) ~ ~ ~r ,~ o ~1 ~ u~
~ O N O ~ C~O
~0 ~o U~ ~
00 00 . O O Ct~ O
~1 00 O ~0 O O O. O
o o e~ a~ o o o a~ ,~ ~ ~ u~ '-D o t~ 0 ~ _1O C~ O
r- o ~r ~u~ ~1 1~' ~D _~ ~0,0~U~ Ct) ,e ~'~
E~ u~ o ~o~ ~ o o ) O ~ t~ O ,~
u~ O ~ ~
` ~ oo ~ r~l n ~ ~ In ,., ~1 OU~ ~1 ~ O O ~
-- a --- --~
. ~ c a~8 0 ~-3.~-3'o.~3 ~ 9~
o~l 15 3~
.~ ~a ~1~ ! polyp~o~/ene~
f~L On one side of the-}~ film having a thickness of 40 ,u, were coated the various adhe~ive compo~itions shown in Table 4 and dried to obtain adhesive tapes with adhesive layers having a thicknes~ o 20 11. The prop~rl~ies of the tapes were then mea~ured, me re~ults are shown in Table 4u i f :~ , .
:
Z~3~3 . _ _ . ~ o o ~ ô u~
O o ~ ~ ôo o~
~ o o o o o ~
CO o CO ~o~ ,~ooc~ . .
,, I U~ U~ U~ C, o ~; _1 00 _ 07 _~ C:~ O o O
(~ O 0 ~0 O 00 O
a~ oo ~-D ~ o O 0'0 ~ OO O U~ 1" "''.
N O O O O O O O O O O
q~ ~-1 ~t ô U~ ~
~ O O ~ 1n O00'' ~ .
~ O O O O O O O O O
~1 _1 ~ Ul1~ U) CO O O O ~0 'o O, O O O O
. ._ . . , ~ N
~ 00 ~ ,n o D ~} S L~ u ~ i~ S
E~:~
On a polyester film having thickness of 25 ~, was coated a composition ~hown in Table 5, and then dried to obtain an adhesive tape having an adhesive layer with a thickness of 25 ~. The properties of the obtained tape are shown in Table 5O
Exa_ple 3~
On an unplasticized PvC film, was coated an adhesive composition shown in Table ~, and dried to ob~ain an adhesive tape having an adhesive layer with a thickness of 20 ~. me properties of the tape are shown in Table 5.
Table S
~ . .
Example No.
_ __32 33 Adhesive Composition .
Petroleum resin 50 50 Polyterpene ~ 10 CaC03 10 Titanium oxide 50 Mineral and vegetable oil and modified oil thereo~ 30 .. . _ _ _ Properties Initial adhesive strength500 600 (g/5 mm diamet~r) Adhesive strength 600 500 (g/20 m~.wqdth) Self-adhesive strength1,600 1,500 (g/20 mm wldth Self-adhesion keeping 0 O
property (mm/20 mn 500 g.hr) . . .. ~ ., _ 1 8 ~-~2~3~3 Example 34 An adhesive tape was prepared by coating the adhesive compositions on polypropylene films as shown in Table 6.
S Using the tape, two bundles of spinach, having a weight of 250 g each, were tied up with a sel~-bonding length between tape ends of 17 mm. Immersing the bundled spinach into water, the length of the self bonded parts of the tapes which peeIed off in the course o~ time were ~hen measured. The results are ~hown in ~ble 6.
Table 6 . . ... . ........ _ _ Composition Elastomer SIS 100 parts mickener (Quintone A-100~30 parts Additive (Factice) 60 part~
, Peeling off of thë
bonding part 70 min. latex 0 120 min. later 0 220 min. later 0 17 hours later 6 mm . . .. .~ . , .
-- lg -.~
. .
Claims (9)
1. A pressure sensitive adhesive tape for bundling vege-tables or flowers, comprising a waterproof substrate coated on one side only with a substantially continuous coating of an adhesive composition comprising:
100 parts by weight of an elastomer consisting of styrene-isoprene-styrene block copolymer or a mixture of styrene-isoprene-styrene block copolymer as the principal ingredient and another elastomer as an auxiliary ingredient selected from styrene-butadiene-styrene block copolymer, natural rubber, isobutylene and butyl rubber;
20 to 150 parts by weight of a thickener selected from polyterpene, rosin ester, petroleum resin and mixtures thereof; and 0 to 150 parts by weight of additives;
the tape having an adhesive strength of 100-700g/20mm width and a self-adhesive strength of at least 1300g/20mm width.
100 parts by weight of an elastomer consisting of styrene-isoprene-styrene block copolymer or a mixture of styrene-isoprene-styrene block copolymer as the principal ingredient and another elastomer as an auxiliary ingredient selected from styrene-butadiene-styrene block copolymer, natural rubber, isobutylene and butyl rubber;
20 to 150 parts by weight of a thickener selected from polyterpene, rosin ester, petroleum resin and mixtures thereof; and 0 to 150 parts by weight of additives;
the tape having an adhesive strength of 100-700g/20mm width and a self-adhesive strength of at least 1300g/20mm width.
2. A tape according to claim 1 wherein at least 90% by weight of the elastomer is styrene isoprene-styrene block copolymer.
3. A tape according to claim 1 having a self-adhesive keeping strength of 0 to 7mm/500g. hr.
4. A tape according to claim 1, claim 2 or claim 3 in which the self-adhesive strength is above l500g/20mm width.
5. A tape according to claim 1, claim 2 or claim 3 in which the self-adhesive strength is 1500 to 3000g/20mm width.
6. A tape according to claim 1, claim 2 or claim 3 in which the composition is present as a coating having a dry thickness of 5 to 30 microns.
7. A tape according to claim 1, claim 2 or claim 3 in which the substrate is selected from polypropylene film, polyethylene film, unplasticized polyvinylchloride film and polyester film.
8. A tape according to claim 1, claim 2 or claim 3 in which the additives are selected from calcium carbonate, zinc oxide, titanium oxide, vegetable oil, mineral oil, modified vegetable oil, paraffinic or aromatic process oil, polybutene, liquid polyisobutylene and polyterpene having a softening point of at most 20°C.
9. A tape according to claim 1, claim 2 or claim 3 in which the thickener has a softening point of 100°C or more and comprises petroleum resin selected from synthetic polyterpene, alicyclic resin, hydrogenated hydrocarbon resin, unsaturated hydrocarbon resin and isoprene hydrocarbon resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000408442A CA1154633A (en) | 1979-07-13 | 1982-07-29 | Pressure sensitive adhesive composition and adhesive tape prepared therefrom |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP088963/79 | 1979-07-13 | ||
| JP8896379A JPS5626968A (en) | 1979-07-13 | 1979-07-13 | Adhesive tape for bundling raw vegetable of flower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1142038A true CA1142038A (en) | 1983-03-01 |
Family
ID=13957475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000332605A Expired CA1142038A (en) | 1979-07-13 | 1979-07-26 | Pressure sensitive adhesive composition and adhesive tape for tying prepared therefrom |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5626968A (en) |
| AU (1) | AU527706B2 (en) |
| BE (1) | BE884284A (en) |
| CA (1) | CA1142038A (en) |
| CH (1) | CH644390A5 (en) |
| DE (3) | DE2930554C2 (en) |
| DK (1) | DK153565C (en) |
| ES (1) | ES482906A1 (en) |
| FI (1) | FI793667A (en) |
| FR (1) | FR2460984A1 (en) |
| GB (2) | GB2057916A (en) |
| IL (1) | IL60011A (en) |
| IT (1) | IT1198312B (en) |
| NL (1) | NL7908772A (en) |
| NO (1) | NO794055L (en) |
| NZ (1) | NZ191167A (en) |
| SE (1) | SE446192B (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4327147A (en) * | 1981-05-22 | 1982-04-27 | Minnesota Mining And Manufacturing Company | Shear-activated innerseal |
| JPS5852379A (en) * | 1981-09-22 | 1983-03-28 | Nichiban Co Ltd | Thermosensitive self-adhesive tape for use in tying |
| JPS59177943A (en) * | 1983-03-28 | 1984-10-08 | Nitto Electric Ind Co Ltd | Wafer fixing adhesive thin plate |
| JPH068404B2 (en) * | 1984-12-28 | 1994-02-02 | 日東電工株式会社 | Bonding adhesive tape or sheet |
| IT1181945B (en) * | 1984-12-31 | 1987-09-30 | Manuli Autoadesivi Spa | IMPROVEMENT IN SELF-ADHESIVE TAPES |
| JPH0686586B2 (en) * | 1985-04-05 | 1994-11-02 | 日東電工株式会社 | Pressure sensitive adhesive composition |
| JPS63278989A (en) * | 1987-05-12 | 1988-11-16 | F S K Kk | Pressure-sensitive adhesive sheet |
| JPS63312383A (en) * | 1987-06-11 | 1988-12-20 | ハンガリア ミユアンヤグフエルドルゴゾ バララツト | Coating or adhesive tape for covering products and manufacture |
| GB2223023A (en) * | 1988-09-23 | 1990-03-28 | Pdi Inc | Multipurpose adhesive |
| US5888335A (en) * | 1989-10-26 | 1999-03-30 | Minnesota Mining And Manufacturing Company | Multiple releasable contact responsive fasteners |
| US6004670A (en) | 1989-10-26 | 1999-12-21 | Minnesota Mining And Manufacturing Company | Multiple releasable contact responsive fasteners |
| JPH04105598U (en) * | 1991-02-26 | 1992-09-10 | 富士電気化学株式会社 | Electromagnetic shield printed wiring board |
| US5274036A (en) * | 1992-11-17 | 1993-12-28 | Ralf Korpman Associates | Pressure sensitive adhesive |
| DK72293D0 (en) * | 1993-06-18 | 1993-06-18 | Danpren As | SOLUTION CONTAINING BLOCK COPYLYMERS SUITABLE FOR MANUFACTURE OF THIN-WEIGHTED RUBBER ART BY THE DIP METHOD, PROCEDURE FOR MANUFACTURING SUCH RUBBER ARTICLES, AND THESE RUBBER ARTICLES |
| US5733652A (en) * | 1995-02-10 | 1998-03-31 | Minnesota Mining And Manufacturing Company | Banding system, banding tape and methods of using the same |
| JP3544417B2 (en) * | 1995-12-13 | 2004-07-21 | 日東電工株式会社 | Adhesive tape for plant unity |
| DE19732958A1 (en) * | 1997-07-31 | 1999-02-04 | Coroplast Fritz Mueller Kg | Adhesive tape for wrapping elongated goods, such as cable sets, plastic profiles or the like. |
| WO1999013016A1 (en) * | 1997-09-08 | 1999-03-18 | National Starch And Chemical Investment Holding Corporation | The use of natural oils in hot melt adhesives |
| FR2776617B1 (en) * | 1998-03-25 | 2000-05-05 | Patrick Gennesson | PROCESS FOR ASSEMBLING MULTIPLE OBJECTS USING A PLASTIC STRETCH FILM |
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| BE1019382A5 (en) | 2010-06-22 | 2012-06-05 | Imperbel N V Sa | BINDING COMPOSITION. |
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| JP6842942B2 (en) * | 2016-02-24 | 2021-03-17 | デンカ株式会社 | Adhesive composition and adhesive tape using it |
| CN108610756A (en) * | 2017-01-17 | 2018-10-02 | 贵州维修大师科技有限公司 | A kind of hyalomitome response type Self-adhesive waterproof material |
| CN115109539B (en) * | 2022-07-14 | 2024-04-19 | 山东中烟工业有限责任公司 | Preparation method of ionic liquid rubber type pressure-sensitive adhesive |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239478A (en) * | 1963-06-26 | 1966-03-08 | Shell Oil Co | Block copolymer adhesive compositions and articles prepared therefrom |
| GB1064825A (en) * | 1964-08-15 | 1967-04-12 | Smith & Nephew | Adhesive composition |
| GB1066840A (en) * | 1964-11-26 | 1967-04-26 | Smith & Nephew | Improvements in and relating to adhesive tapes and the like |
| GB1081291A (en) * | 1965-06-09 | 1967-08-31 | Bakelite Xylonite Ltd | Pressure sensitive adhesive |
| US3427269A (en) * | 1966-03-14 | 1969-02-11 | Shell Oil Co | Adhesive compositions comprising certain block copolymers and selected resins |
| GB1177675A (en) * | 1966-04-13 | 1970-01-14 | Morgan Adhesives Co | Pressure Sensitive Adhesive Composition. |
| DE1931562B2 (en) * | 1968-06-25 | 1975-01-30 | The Flintkote Co., White Plains, N.Y. (V.St.A.) | 06/28/68 USA 741231 Hotmelt pressure sensitive adhesive based on a rubber-like block copolymer of styrene and butadiene or styrene and isoprene |
| GB1277363A (en) * | 1969-03-17 | 1972-06-14 | Goodyear Tire & Rubber | Adhesive composition |
| US3681190A (en) * | 1970-05-07 | 1972-08-01 | Minnesota Mining & Mfg | Pressure-sensitive adhesive tape |
| US3925271A (en) * | 1972-03-28 | 1975-12-09 | Johnson & Johnson | Pressure sensitive adhesive composition |
| JPS5420972B2 (en) * | 1973-04-14 | 1979-07-26 | ||
| JPS5945705B2 (en) * | 1973-10-15 | 1984-11-08 | ジヨンソン・エンド・ジョンソン | Method for manufacturing pressure sensitive adhesive sheet or tape |
| JPS519130A (en) * | 1974-07-12 | 1976-01-24 | Kuraray Co | |
| JPS5132777U (en) * | 1974-09-02 | 1976-03-10 | ||
| JPS5928236B2 (en) * | 1975-11-10 | 1984-07-11 | 株式会社クラレ | Isoprene salt |
| JPS53102938A (en) * | 1977-02-21 | 1978-09-07 | Kuraray Co Ltd | Pressure sensitive adhesive composition |
-
1979
- 1979-07-13 JP JP8896379A patent/JPS5626968A/en active Granted
- 1979-07-26 CA CA000332605A patent/CA1142038A/en not_active Expired
- 1979-07-26 GB GB7926148A patent/GB2057916A/en not_active Withdrawn
- 1979-07-27 ES ES482906A patent/ES482906A1/en not_active Expired
- 1979-07-27 DE DE2930554A patent/DE2930554C2/en not_active Expired
- 1979-07-27 DE DE2954239A patent/DE2954239C2/de not_active Expired - Fee Related
- 1979-07-27 DE DE2954420A patent/DE2954420C2/de not_active Expired - Fee Related
- 1979-07-31 FR FR7919719A patent/FR2460984A1/en active Granted
- 1979-07-31 AU AU49402/79A patent/AU527706B2/en not_active Ceased
- 1979-07-31 NZ NZ191167A patent/NZ191167A/en unknown
- 1979-07-31 IT IT24793/79A patent/IT1198312B/en active
- 1979-11-19 CH CH1029479A patent/CH644390A5/en not_active IP Right Cessation
- 1979-11-22 FI FI793667A patent/FI793667A/en not_active Application Discontinuation
- 1979-11-26 SE SE7909765A patent/SE446192B/en unknown
- 1979-12-05 NL NL7908772A patent/NL7908772A/en not_active Application Discontinuation
- 1979-12-12 NO NO794055A patent/NO794055L/en unknown
-
1980
- 1980-05-06 IL IL60011A patent/IL60011A/en unknown
- 1980-07-11 BE BE0/201384A patent/BE884284A/en not_active IP Right Cessation
- 1980-07-11 GB GB8022843A patent/GB2058610B/en not_active Expired
- 1980-07-11 DK DK299380A patent/DK153565C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NZ191167A (en) | 1982-03-16 |
| BE884284A (en) | 1981-01-12 |
| JPS6245273B2 (en) | 1987-09-25 |
| DE2930554A1 (en) | 1981-01-15 |
| CH644390A5 (en) | 1984-07-31 |
| IL60011A0 (en) | 1980-07-31 |
| GB2058610B (en) | 1984-01-04 |
| ES482906A1 (en) | 1980-09-01 |
| IT7924793A0 (en) | 1979-07-31 |
| GB2057916A (en) | 1981-04-08 |
| GB2058610A (en) | 1981-04-15 |
| SE446192B (en) | 1986-08-18 |
| DE2930554C2 (en) | 1986-10-16 |
| NO794055L (en) | 1981-01-14 |
| DK153565C (en) | 1988-12-12 |
| NL7908772A (en) | 1981-01-15 |
| FR2460984A1 (en) | 1981-01-30 |
| DK299380A (en) | 1981-01-14 |
| SE7909765L (en) | 1981-01-14 |
| DE2954239C2 (en) | 1991-08-08 |
| IL60011A (en) | 1984-02-29 |
| FI793667A (en) | 1981-01-14 |
| AU4940279A (en) | 1981-01-15 |
| JPS5626968A (en) | 1981-03-16 |
| FR2460984B1 (en) | 1985-02-08 |
| DE2954420C2 (en) | 1990-11-29 |
| DK153565B (en) | 1988-07-25 |
| IT1198312B (en) | 1988-12-21 |
| AU527706B2 (en) | 1983-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |