Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
• • 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
  • C09J7/26—Porous or cellular plastics
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F2003/023—Adhesive
  • G09F2003/0236—Permeability

Definitions

• This invention relates to an improvement in marking materials for decoration and marking used by application to outdoor signs, gasoline tanks for two-wheeled vehicles, vehicular body surfaces and the like. More particularly, this invention relates to an improvement in air-permeable marking materials without causing peeling or blistering, etc. even on evolution of gases (outgassing) from the adherend to be applied.
• Figures 3 to 7 are sectional views illustrating conventional air-permeable marking materials wherein 1 is the base; 2 is the adhesive layer; 3 is a hole; 4 is a porous layer; 5 is the adherend; and 6 is the marking.
• a marking material shown in Figure 3 has a construction wherein an adhesive layer 2 is laminated to a base 1, and venting holes 3 are mechanically or chemically formed therein.
• a marking material as shown in Figure 4 has a construction, wherein a base 1 is formed from an air-permeable fibrous material.
• a marking material as shown in Figure 5 has a construction wherein an air-permeable porous layer 4 such as a foam, paper or fibrous material is formed between a base 1 and an adhesive layer 2. (See for example the laid-open publication of Japanese UM application Kokai (laid-Open) No. 90980/84).
• a marking material as shown in Figure 6 has a construction wherein an adhesive layer 2 is formed from an expanded porous material.
• an air-impermeable marking material having a construction wherein a base 1 is extremely thick (about 250 ⁇ m or above) and the strength thereof is increased to enclose an escaping gas .
• a desired marking is provided on the marking material of Figure 3 and has too large a pore size (usually formed by printing methods such as offset, gravure or screen printing, or coating methods such as roll coating or knife coating) , the surface conditions are bad with poor gloss, and the marking material cannot be put to vertical use. If the pore size is too small, pores are filled in forming the marking, and the air permeability is unfavorably inferior. The working of pore size is very difficult with bad workability.
• the base 1 has low mechanical strength and is easily broken.
• the smoothness of the base 1 is poor, and it is difficult to obtain a glossy marking material.
• the marking material shown in Figure 5 has porous layer 4 of low mechanical strength which not only tends to cause layer cleavage but also is incapable of outgassing outside, thereby causing blistering, etc. on application to an adherend evolving a great volume of gases (for example application to molded RIM bumpers or FRP plates or application to polyethylene containers filled with gasoline).
• the marking material shown in Figure 6 not only has a low bonding strength and tends to peel from the adherend but also is incapable of letting a large volume of gases escape to the outside, thereby causing blistering, - etc. in the same manner as the marking material shown in Figure 5.
• the marking material shown in Figure 7 arouses no problem in a short time after application to an adherend, but there is a problem of rather severe blistering, peeling, etc. with the lapse of time.
• a marking material comprising an adhesive layer on at least one surface of a base, said base being formed from a continuous porous plastic film having an average pore size of 0.2 to 50 ⁇ m, an air permeability of 2 to 120 sec/100 cc and a thickness of at least 20 ⁇ m.
• Figure 1 is a sectional view showing the marking material of this invention
• Figure 2 is a sectional view of a marking material of this invention, which is given marking and applied to an adherend;
• Figures 3 to 7 are sectional views illustrating conventional air-permeable marking materials wherein:
• 2 is the adhesive layer; 3 is a hole;
• Such materials have a construction wherein a base 1 is formed from a continuous porous plastic film having an average pore size of 0.2 to 50 ⁇ m, an air permeability of 2 to 120 sec/100 cc (measured by the Gurley method provided for in the JIS P8117) and a thickness of at least 20 ⁇ m, and an adhesive layer 2 contained on one side of the base 1.
• a release material may be further laminated to the surface of the adhesive layer 2 to facilitate the handling of the marking materials. If the average pore size is smaller than 0.2 ⁇ m, the holes are filled by the marking formed on the marking materials, and the air permeability is unfavor ⁇ ably inferior.
• the average pore ' size exceeds 50 ⁇ m, poor appearance of the marking is produced, and the material cannot be placed into practical use.
• the average pore size within the range of 20 to 20 ⁇ m is particularly preferred for providing glossy marking while obtaining effective air permeability. If the air permeability (measured in sec/100 cc by the Gurley method provided for in the JIS P8117) exceeds 2 sec/100 cc (the lower value meaning a greater air permeability, and the value exceeding 2 sec/100 cc meaning a smaller value, the surface smoothness of the base 1 is inferior, and poor appearance of the marking is produced. If the air permeability is below 120 sec/100 cc (the numerical value is increased in this case), the air permeability is unfavorably inferior.
• the air perme ⁇ ability of 10 to 50 sec/100 cm is more preferred, considering the strength and air permeability performance of the base 1.
• the thickness of the base 1 is below 20 ⁇ m, the area of th cut end surface of the marking materials is small, and the air permeability will be unfavorably inferior.
• the thickness of the base 1 is preferably in the range of 60 to 200 ⁇ m taking into account the stabilized air permeability, economic efficiency and workability, etc. of the marking materials.
• the base 1 of this invention can be produced by the respective methods of sintering, mixed extracting, phase separation and drawing as disclosed in the post-exam publication of Japanese Patent Kokoku (Post-Exam Publn.) No. 5327/84 and the like, and general-purpose thermoplastic materials such as vinyl chloride, polyethylene, acrylic, urethane and polypropy- lene may be used.
• An adhesive capable of providing sufficient adhesive force to the base to be laminated to the adherend may be sufficiently used, and a coating thickness within the ordinarily used range provides sufficient air permeability without performing working. Therefore, a general-purpose adhesive such as acrylic, rubber, silicone and the like may be used.
• the marking surface of the marking material similar to the above-mentioned (a) was inspected by visual examination, and evaluation was made on the following criteria:
• Table 1 shows evaluation results of tests with varying average pore size at a base thickness of 70 ⁇ m and an air permeability of 30 sec/100 cc.
• Table 2 shows evaluation results of tests with varying air permeability at a base thickness of 70 ⁇ m and an average pore size of 10 um.
• Table 3 shows evaluation results of tests with varying base thickness at an average base pore size of 10 ⁇ m and an air permeability of 30 sec/100 cc.
• Results x were obtained in both the blistering tests 1 and 2 of the conventional marking materials shown in Figures 3, 5, 6 and 7 cited above, and results x were obtained in the appearance conditions of the conventional marking material shown in Figure 4 cited above. Table 2
• Example 2 A continuous porous polypropylene film (manufactured by Sumitomo 3M Ltd.) was used as a base, and the surface of the base was primed with a chlorinated polypropylene (manufactured by Toyo Kasei Kogyo Co., Ltd.). An acrylic adhesive and a release material were laminated to the primed base similarly to Example 1 to form a marking material. Marking was provided on the base in the manner similar to Example 1, and evaluation of the aforesaid blistering tests (respectively collected in one mark since similar results were obtained in (T) and( ⁇ 2)) , appearance conditions and surface gloss was made. Evaluation results of this Example and a Comparative Example are shown in Tables 4 to 6.
• Table 4 shows evaluation results of tests with varying average pore size at a base thickness of 80 ⁇ m and an air permeability of 38 sec/100 cc.
• Table 5 shows evaluation results of tests with varying air permeability at a base thickness of 80 ⁇ m and an average pore size of 3.2 ⁇ m.
• Table 6 shows evaluation results of tests with varying base thickness at an average base pore size of 3.2 ⁇ m and an air permeability o 38 sec/100 cc.
• the base of the marking materials of this invention is formed from a continuous porous plastic film having an average pore size of 0.2 to 50 ⁇ m, an air permeability of 2-120 sec/100 cc and a thickness of 20 ⁇ m or above, and marking having good matte to glossy appearance conditions can be provided on the base. Furthermore, a marking material having sufficient air permeability can be obtained even if marking is provided all over the surface. Since there is no porous layer between the base and the adhesive layer, the marking materials having a high strength can be provided without causing layer cleavage.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Laminated Bodies (AREA)
• Adhesive Tapes (AREA)
• Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
• Glass Compositions (AREA)
• General Preparation And Processing Of Foods (AREA)

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• 1984
  • 1984-12-14 JP JP59262993A patent/JPS61141477A/ja active Granted
• 1985
  • 1985-12-10 WO PCT/US1985/002442 patent/WO1986003767A1/en not_active Application Discontinuation
  • 1985-12-10 EP EP86900474A patent/EP0203996A1/en not_active Withdrawn
  • 1985-12-10 KR KR1019860700562A patent/KR930010441B1/ko not_active IP Right Cessation
  • 1985-12-13 CA CA000497556A patent/CA1282287C/en not_active Expired - Fee Related

Non-Patent Citations (1)

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