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Pressure-sensitive adhesive products - by coating flexible carriers with solvent-free hot melt adhesives
Pressure-sensitive adhesive products - by coating flexible carriers with solvent-free hot melt adhesives
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机译:压敏胶产品-通过用无溶剂的热熔胶涂布柔性载体
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摘要
The thermoplastic pressure-sensitive adhesive consists of (A) 10 to 110 pts. of thermoplastic polymer (B) 10-90 pts. adhesive resin with lower softening pt. or resin mixt. with softening pt. 100 degrees C and (C) 10 to 90 pts. filler. The composition is heated to 121-204 degrees C and applied as a fluid liquid melt to at least one side of a flexible carrier. Pref. compsns. contain (A) 35 pts. thermoplastic styrene-isoprene block copolymer, (B) 30 pts. polyterpene resin and 47.5 pts. hydrocarbon resin, with a combined softening pt. of 65 degrees C and (C) 47.5 pts. calcium carbonate. They can be applied by usual equipment, e.g. hot knife over-roll coater or extrusion coater, at high speeds of 152-305 m/min. Use of solvents or prolonged mastication to reduce viscosity is eliminated and expensive equipment e.g. for drying or multiple calendering is not required.
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机译:热塑性压敏胶粘剂由(A)10至110磅组成。 10-90点的热塑性聚合物(B)。软化点较低的粘合树脂。或树脂混合物。与软化点。 100摄氏度和(C)10至90磅。填料。将该组合物加热至121-204℃,并以液态液体熔体的形式施加到柔性载体的至少一侧。首选compsns。包含(A)35分。热塑性苯乙烯-异戊二烯嵌段共聚物,(B)30分。聚萜烯树脂和47.5分。烃树脂,具有组合的软化点。 65摄氏度和(C)47.5分。碳酸钙。它们可以通过常规设备如热刀辊涂机或挤出机,速度为152-305 m / min。消除了使用溶剂或延长咀嚼时间以降低粘度的麻烦,并且使用了昂贵的设备,例如不需要干燥或多次压光。
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