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[Patents affecting the world] adhesive tape
- Jul 11, 2018 -

009细节图.jpgRichard Drew was born in 1886 and died in 1956. He entered the Minnersota Mining and Manufacting Company in St. Paul, Minnesota, in 1923 (later known as 3M). At the time, the company was still a small company that created sandpaper. On one occasion, Drew engaged in a new type of sandpaper. In order to understand the trial performance of the sandpaper, he visited the car repair shop using the sandpaper. He heard employees at the auto repair shop talking about the problems encountered in border processing when painting the car in two colors. When a paint is applied, when you want to apply another color of paint, always use a bulky cover tape to block the painted part, and then apply another color of paint, but when removing the masking tape, The paint was often knocked out, and Drew had an idea at the time. If the abrasive material of the sandpaper was removed, a suitable adhesive was applied to the backing paper to form a light and convenient mask. Belt, can you solve this problem? After returning to the company, he actively invested in the development work, from the selection of the backing base paper, the formulation of the adhesive to the repeated selection of the processing technology, and developed a 5 cm wide khaki paper coated with a very light, pressure sensitive transparent adhesive. With the masking tape, both US and British patents have been applied.

Drew filed a US patent application on May 28, 1928, and obtained a US patent on May 27, 1930, the patent number is US1760820; the obtained British patent number is GB312610.

The patent is entitled "Tape." The invention relates to pressure sensitive adhesives, adhesive compositions, adhesive coatings, tapes, and tapes and coatings for waterproofing and self-adhesive. A variety of new products are provided, one of which is coated with a pressure sensitive wrinkle or crepe-based paper adhesive film; a embossed tape from a rugged rough paper back sheet and a surface thereof coated with a pressure sensitive adhesive; A film and tape coated with a pressure sensitive adhesive on one surface and a uniform fibrous backsheet with a non-adhesive agent; one surface coated with a water-insoluble sensitive adhesive and the other coated with a non-adhesive Film and tape of uniform fibrous backsheet; these tapes can also be made into tape. The base paper and the backboard refer to kraft paper, cotton cloth, parchment paper, sulfuric acid paper, etc., and are soaked, pressed and dried with dry gum and light yellow glycerin to make them soft and tough, and not easy to break. . The transparent adhesive which is mainly composed of a rubber and mixed with a reinforcing agent synthetic resin may be colored with a coloring agent such as zinc oxide.

The patent exemplifies an application example of a tape by means of a drawing, FIG. 1 shows a perspective view of the invention as a masking tape for a painter; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; A perspective view of an application. In conjunction with Figure 1, the base paper tape (10) is soaked with gelatin and coated on one side with a dry, pressure sensitive tape surface (11); used as a painter's masking strip (12) with its upper edge ( 13) adhered to the pressure-sensitive adhesive tape surface (11), and forms a protruding portion (14) of the pressure-sensitive adhesive tape surface with the pressure-sensitive adhesive tape, and the protruding portion is required to have a certain width so that the painter's shielding strip can Stay close to where you need it.

The pressure-sensitive adhesive that was initially made was not so successful. Since the adhesive was applied only to the edge of the belt, and there was no coating in the middle, when it was used in an automobile repair shop, the adhesion soon fell, and the painter was facing Drew said loudly, "Take this belt back to your Scotch boss and tell him to apply more adhesive." Of course, Scotch (Scotland) here does not refer to people or places in a certain place, but a slang. , means the meaning of 吝啬. Drew improved the tape accordingly. During the same period, he investigated the improvement of the waterproof and moisture-proof sealant for the tape, which was used in the refrigerated compartment of the train. At that time, DuPont had developed cellophane. Although this paper was waterproof, it also had problems with heat-sensitive and adhesive coating. Drew processed the cellophane, improved the adhesive, and successfully developed the scotch tape. Many food packaging companies asked him to provide waterproof sealants for plastic food bags. After the development, it was not long. DuPont introduced a heat-sealed plastic bag mouth device. 3M Company sold the food bag with pressure-sensitive sealant directly to the store and reversed the trend. Coupled with the world economic depression, people live relatively poorly, and many users find that scotch tape can be used to make up clothes and cracked eggs. What brand is the product used for? Drew remembers that when people started laughing at his "Scotch," they named Scotch? A few years later, John Borden, a sales manager at the company, invented a range of different adhesive formulations.

Drew’s invention also created 3M. In the 1940s, 3M formed the Scotch series. 3M Company decided to switch from sandpaper and abrasives to sealant, adhesive and tape. The company has more and more varieties of products, which are popular among consumers, and the supply is in short supply. In the 1970s, the company obtained a US patent for the Post-it notes (patent number US3691140). 3M is the world's recognized first brand in the tape industry. 3M has become a world-famous multinational company that produces and sells tens of thousands of products worldwide. Products include industrial, chemical, electronics, electrical, communications, transportation, automotive, aerospace, medical, construction, culture, education, office, commercial and consumer goods. 3M's share price has become one of the Dow Jones Industrial Stock Index components.

The adhesive used at the time was mainly rubber, but nowadays a wide range of polymers are widely used. From the perspective of baseband materials, there are biaxially oriented polypropylene (Bopp) tape, cloth tape, kraft paper tape, masking tape, fiber tape, PVC tape, PE foam tape, etc.; single-sided tape and double-sided tape; Functionally, there are warning tapes, carpet tapes, high temperature tapes, stationery tapes, antistatic tapes, waterproof tapes, anti-theft tapes, non-slip tapes, shock-proof tapes, shading tapes, reflective tapes, anti-corrosion tapes, shielding tapes, and for construction, Tapes such as iron sheets and composite tapes for joints between bridges, subways, and underground concrete have been used in various industries and people's daily lives.