TW591073B - Rubber eraser composition capable of being formed by multi-color injection, extrusion and printing - Google Patents

Abstract

A rubber eraser composition comprises (1) styrene-diene rubber or styrene-butadiene or styrene isoprene or a hydrogenated polymer formed of the above two; (2) ethylene-propylene-non-conjugated diene; (3) a softening oil; and (4) inorganic fillers, pigments, or a mixture thereof. The rubber eraser composition contains no PVC and can be made into a multi-colored rubber eraser by injection molding or extrusion molding, and can be printed.

Description

591073 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs, the invention description (/) < Scope of Invention > The present invention relates to a new rubber = composition that does not contain PVC (polyvinyl chloride). It is composed of special materials and can be processed by injection molding or extrusion, but it can not only be used for single-color injection or extrusion, but can be used for multiple = injection or extrusion. It has good wiping properties and can be used on the molded eraser. Printing, low pollution and recyclable advantages. < Explanation of previous techniques > As everyone knows, the earliest eraser was made of natural rubber. After the Tianxian rubber was mixed with carbonic acid and sulfur, it was hot-pressed or extruded and then added to obtain an eraser. The natural rubber-based eraser has a hard texture, and the dirt valleys that wipe the wrong spots are easily attached to the eraser. In addition, erasers made with natural rubber cannot be recycled because they have been vulcanized. 〆After the invention of plastic materials, people used soft PVC to make erasers. It was made by mixing PVC powder, calcium carbonate with DOP (dioctyl phthalate) and other plasticizers under appropriate conditions (such as 17〇t, 15 minutes) gelation to obtain an eraser. The material of the PVC eraser is softer, and the wiping property is also better. In addition, it can be produced by the extrusion method, so its production speed is faster, and its economic value is also higher. Although PVC eraser has many advantages, using PVC eraser also has its disadvantages in terms of environmental protection. First, PVC is easy to decompose at higher temperatures (such as 20 (rc), and produces acidic hydrogen chloride gas. Therefore, PVC erasers are not conducive to recycling. Second, as a result of the extensive use of plastic products, plastic waste Accumulation has become a serious problem, and its possible solutions include weight reduction, recycling or incineration, etc. Among them, incineration is a very effective, simple, convenient and economical paper standard applicable to China National Standards (CNS) A4 (210X297) Li) (Please read the notes on the back before filling this page)

591073 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (1 Method 'but must be' Flammable waste must not generate toxic substances after combustion and cause secondary pollution, PVC contains chlorine, in Combustion often produces some compounds with t, and even the risk of dioxin (dangerous). Therefore, the use of soft pVc materials is not very suitable for injection molding processing, and the use of extrusion rules has its production rate limitations, and sometimes not If the injection molding process is fast, and the advanced environmental protection countries abroad require that the eraser used by people cannot contain PVC, therefore, the development of an eraser material that can be injection molded and does not contain PVC will help solve the future—some environmentally friendly Question 0 In the national patent application No. 85113906, it has been revealed that the state-free rubber composition can be injection molded or extruded, and has good wiping properties, is not easy to ooze oil, has less pollution and can be recovered. . This kind of eraser composition is made of acetophenone material and its group flavonolene; (3) softening oil; fluorinated polystyrene elastomer; It can be obtained by mixing additives, pigments, or their compositions. () Inorganic compounds are filled with the contents of the various components disclosed in the scope of their patent applications. Diene rubber, styrene-diene_styrene segmented co- ^ styrene-diene Stupid vinyl glue of styrene segmented copolymers == Na ~~ (2) Poly-smoked smoke 5 to 40%; (3) White wax oil or ring softened oil 3 ~ 30%; (4) 2 to Polycarbonate elastomers ^ to% inorganic fillers, pigments, or combinations thereof.) To 80. In its examples, it is also pointed out that if the finished product contains an anionic hydrocarbon elastomer, an eraser can be obtained without spitting out oil. The function of the p.ene is only after the inventors observed the eraser composition of the case in detail. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X29? Mm) (Please read the precautions on the back before filling in this page)

591073 Printed by the Consumers' Cooperative Bureau of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the People's Republic of China, and a description of the invention. 0) At present, this kind of eraser composition still spit out oil, so it is beneficial to print on the surface of the basin. And 'is a kind of eraser composition can not be made more ^ Extrusion molding, the value of miscellaneous rubber products is increased, the contribution is very limited, and the raw materials of the conventional eraser are relatively large in the molding process, which makes it impossible to obtain the finished product. Clear look. However, the rate < General summary of the invention > In view of the earlier PVC-containing eraser with the above-mentioned unrecyclable, _ Japan will produce the disadvantage of toxic substances causing secondary pollution, the present invention is =-a new type of PVC-free The eraser composition, according to the present invention, can be recycled without being contaminated by being left in the ground because it cannot be processed. Such an eraser composition according to the present invention does not need to have a polyolefin smoke elastomer (PO) as in the case of application No. 851139G6, but its oil-spitting situation can be greatly reduced. Because of the phenomenon of oil discharge is greatly reduced? Not only does it have better wiping properties, but also various characters and graphics can be printed on it to increase the interest of the eraser and its appeal to children. This is another purpose. X The eraser composition according to the present invention can be used for multi-color injection and extrusion molding. If the eraser composition of the previous case can only be used for single-color molding, the product of the eraser produced is a commodity The forms are more diverse, and the value of their products is also increased, which is another object of the present invention. Due to the special composition of the eraser composition according to the present invention, in addition to multi-color injection and extrusion molding, the shrinkage rate during molding is greatly reduced, and a more beautiful, clearer eraser can be produced. Wipe, this is the paper size of the table applicable to China National Standard (CNS) A4 specifications (210X297 mm (please read the precautions of back rain before filling out this page) • Order _ Φ .I—-......- 1'- 591073 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (Liao) A further object of the present invention. ≪ Description of preferred embodiments >押 押 仏 仏 4 ^ ^ ^ θ 7 Chu Ya printed eraser set, its detailed composition, other purpose fish, efficacy 'can be seen with reference to the following shadows. The composition of the eraser is composed of Ben Yimu-A fine oak, Diao Yichang, Bing Qin non-diluted oak (M), white wax oil or lye oil type oil, and inorganic fillers, pigments or combinations thereof. In the above ingredients, the content of the material and rubber is 100% by weight of the entire group. The ratio is 5 ~ 40%, and the total amount of ethylene and acrylics is 0.5 ~ 10%. The white I oil or ring e-liquid or its nitrogenized oil is 3 ~ 30%. The inorganic filler, pigment or composition thereof is 5 to &%. And the 'styrene-diene rubber compound may be a styrene-butadiene or styrene isoprene or a hydrogenated polymer of the latter two. Example of the present invention: Example A: A hydrogenated polymer of 10% by weight of stupid ethylene-butadiene, styrene, ethylene, or both, 5% softened oil, and 10% vinylene -Non-conjugated diene and 65% of inorganic filler are mixed into the two-machine without heating equipment and mixed uniformly, then the screw is extruded into the twin-screw extruder (the device with a milk-permeability above the screw is preferred) and the extruder screw The temperature at 4 o'clock is (CNS) Yariwaki (210x297 mm) (please read the precautions on the back * ® before filling this page)

-Order Φ 591073 V. Description of the invention (f) Β7 it material belt middle belt 115 ° C 130 ° C 150 ° c

------- q Zhongcheng's composition is the original material of the eraser extruded% 'can be added with or without organic pigments to obtain different colors of original materials, which can be used for a variety of molding: ① injection molding will The raw material is put into the inlet of the injection machine, and the three-point temperature setting of the injection machine is rfn 4ί

Feeding belt Intermediate belt 100. . 120 ° C end band 140 ° C set as 10 ° C) ❿ Extrusion molding The four-point temperature of extrusion molding is set to

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2. The semi-finished eraser with good printing and excellent wiping performance by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs ⑬ Multi-colored shaped extrusion Same as ③ Multi-colored shaped molds with multi-colored wonderful cute shapes. Under-printed or multi-colored printing rubber is shot or extruded to form pad printing (injecting a three-dimensional rubber multi-colored pattern onto the three-dimensional rubber. Printing a single paper using the outline printing method) The paper size is applicable to China National Standard (CNS) A4 Specifications (X 297 mm) Φ

0 m I Printed by the Consumer Cooperative of the Central Government Bureau of the Ministry of Economic Affairs 591073, Invention Description ("Wonderful Patterns of Colors (Secretary's Life. (Execution Yang) Money Original Bill _ Rubber Injection Health

Example B Hydrogenated ethylene, butadiene, ethylene or both, butene, isoprene, 10% cyclic% of ethylene_propylene-non-glycine (softened oil), = 72 = / Hydrogenated oil (best colorless and transparent) Machine mixing and mixing to make mixed people =; ,,, machine-filled wire operation force capping kneading force equipment and kneading machine; parts need to be pressurized by hydraulic cylinder Material (this square machine is made into the original mixture for 2 times mixing, the early screw cup machine does not need to be heated). And the material of the original material is very good on the surface and inside, and the rigidity is better than that of Example A ::: Two: Both

The processing molding and system ## is scary and the cost is more direct, ι_. Based on the K process and examples, 丨, 丨, U

Example C: A hydrogenated polymer of styrene-butadiene or ethylene or both with a percentage of 23%, 3% ethylene_propyl acetone & pentylene, 12% cycloalcohol, Baixin Or its hydrogenated oil (with colorless transparent two (softened oil), and 62% of inorganic filler, kneaded with ROLL (the roller axis of the open mixer must be organic so that the mixture obtained by kneading the machine itself A is stable) 'The qualitative is better; the raw materials obtained by the device are completed through the forming process of |, 卩, 提及 mentioned in Example A. The paper size is applicable to Chinese national standards (CNs) A4 specifications (210 × 297 mm) ) (Please read the precautions for backing before filling out this page)

591073 A7 B7 V. Description of the invention (1) In this kneading process, styrene-butadiene or styrene isoprene or hydrogenated polymer of both, ethylene-propylene-non-conjugated diene must be kneaded before adding Naphthenic oil, white wax oil or its hydrogenated oil (best colorless and transparent) (softened oil) slowly kneading is more time-consuming, but this method is more traditional than the traditional kneading process. The advantage is that the equipment investment cost is lower. The finished product obtained in the above embodiment is compared with the conventional eraser of the same kind, and it is found that the raw material is made into an eraser. After shrinking, the shrinkage rate is greatly reduced, so the engraving on the finished product is more clear and beautiful. More than others' similar products. According to the present invention, the multi-color injection-extrusion-and-printing eraser composition can be used for multi-color injection-extrusion and extrusion to obtain a non-PVC, recyclable eraser, and the eraser can be printed to give the eraser. Fuller life and fun, this is the erroneous eraser and the previous case, in order to meet the requirements of the patent law of the invention, please grant a patent, it is a virtue. (Please read the precautions before filling this page)

Order Φ. Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs This paper size applies to China National Standard (CNS) A4 (210X297 mm)

Claims (1)

591073 Α8 C8 D8t, n:. ¾. Patent application scope l. An eraser composition that can be extruded and printed in multiple colors, the weight percentage of each component is (1) 10 ~ 23% styrene-diene rubber; (2) 3 ~ 10% ethyl propylene-non-common dilute rubber; (3) 5 ~ 12% white butterfly oil or naphthenic oil softening oil, and (4) 62 ~ 72% inorganic The filler, pigment or composition is obtained by mixing. 2. The eraser composition according to item 1 of the scope of the patent application, wherein the styrene-di-fine rubber compound may be bis-butyl di-, styrene-di-iso-butyl, or nitriding of both Aggregator. (Please read the precautions on the back before filling this page] ¥ This paper size applies to China National Standards (CNs) Α4 size (210 X 297 mm)