WO2007134543A1 - Composition de pmma, procédé de fabrication d'un article plastique à partir de cette composition et utilisation de la composition - Google Patents

Composition de pmma, procédé de fabrication d'un article plastique à partir de cette composition et utilisation de la composition Download PDF

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Publication number
WO2007134543A1
WO2007134543A1 PCT/CN2007/001663 CN2007001663W WO2007134543A1 WO 2007134543 A1 WO2007134543 A1 WO 2007134543A1 CN 2007001663 W CN2007001663 W CN 2007001663W WO 2007134543 A1 WO2007134543 A1 WO 2007134543A1
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WIPO (PCT)
Prior art keywords
pigment
polymethyl methacrylate
thermal stability
antioxidant
resin
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PCT/CN2007/001663
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English (en)
French (fr)
Inventor
Haibo Jiang
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Starlight Plastic Material (Shenzhen) Limited
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Application filed by Starlight Plastic Material (Shenzhen) Limited filed Critical Starlight Plastic Material (Shenzhen) Limited
Publication of WO2007134543A1 publication Critical patent/WO2007134543A1/zh

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24Ablative recording, e.g. by burning marks; Spark recording
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04Homopolymers or copolymers of esters
    • C08L33/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/08Homopolymers or copolymers of acrylic acid esters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04Homopolymers or copolymers of esters
    • C08L33/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10Homopolymers or copolymers of methacrylic acid esters
    • C08L33/12Homopolymers or copolymers of methyl methacrylate

Definitions

  • the present invention relates to a resin composition for preparing a plastic part of a card, a telephone, a computer keyboard, a facsimile machine, and the like, and a method of preparing a plastic part, which is suitable for laser engraving. Background technique
  • Plastic parts for products such as cards, telephones, computer keyboards, and fax machines are generally injection-molded with resin materials such as ABS and HIPS (high-impact polystyrene resin).
  • resin materials such as ABS and HIPS (high-impact polystyrene resin).
  • the plastic parts made of these raw materials of the prior art form characters or patterns on the surface, generally only the ink screen printing method can be used, and the traditionally unchanged imprinting method has complicated operation, the working efficiency is too low, the cost is too high, and the environmental pollution is caused. , the product is not environmentally friendly.
  • this conventional mime printing method cannot be operated on irregular platforms, especially when forming characters or patterns in concealed places such as slits or openings.
  • the characters or patterns formed by the mimeographing method are not resistant to acids, alkalis, and oils, and have poor abrasion resistance and are easy to fall off. Because of the limitations of existing materials, molded plastic products cannot be laser-engraved to form continuous smooth text or patterns. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a polymethyl methacrylate composition whose surface of a plastic product is easy to form a continuous smooth text or pattern and is not easy to fall off, and a method for manufacturing the same. And the use of the composition.
  • the main resin is polymethyl methacrylate
  • the modified resin is a mixture of one or several of polyethyl methacrylate or butyl acrylate, acrylate copolymer, and acrylate rubber.
  • Oxygen agent, heat stabilizer and foaming agent, the thermal stability difference pigment has thermal stability different from that of the poly host resin, and there is a difference in thermal stability between the various pigment components of the composite pigment.
  • the polymethyl methacrylate composition is made in the following manner:
  • thermo-stability difference pigment (B) put the fine powder into the kneading machine, add the thermo-stability difference pigment, and knead it under vacuum and high pressure at 200 ⁇ 220 °C for 40 to 60 minutes until it is molded into a uniform soft body glue;
  • the kneaded soft body rubber is masticated at 180 to 200 ° C by a two-roll mill, and the soft body rubber is pressed into a sheet shape.
  • the mass percentage of each component is - the main resin 39 ⁇ 70%
  • Foaming agent 0.1 ⁇ 0.3%.
  • the antioxidant is a phenolic antioxidant or an amine antioxidant
  • the heat stabilizer is a polyvinyl chloride or a vinyl chloride copolymer
  • the foaming agent is azodicarbonamide.
  • Another technical solution adopted by the present invention to solve the technical problems thereof is to provide a method for manufacturing a plastic product, which mainly comprises the following steps:
  • Thermal stability difference pigment 0.1 ⁇ 5% (2) mixing the main resin and the modified resin into a fine powder to facilitate thorough mixing with other components;
  • thermo-stability difference pigment put the finely ground powder into a kneading machine, add a thermo-stability difference pigment, and heat knead and knead under vacuum and high pressure until masticating into a uniform soft body glue;
  • the method for manufacturing the plastic product further includes after step (5):
  • the molded plastic product is engraved using a laser engraving machine to form a pattern or text.
  • the step (3) is carried out by heating at 200 to 220 ° C under vacuum and high pressure for kneading and kneading for 40 to 60 minutes until mastication into a uniform soft rubber; the step (4) double roll mill is at 180 to 20 ( Mastication is carried out under TC; in the step (6), the power of the laser engraving machine is 50W, and the laser speed is 7Kmm/s.
  • the invention also provides the use of the polymethyl methacrylate composition in laser engraving.
  • the polymethyl methacrylate composition is laser engraved to form a pattern or text.
  • the invention has the beneficial effects that the plastic product formed by the polymethyl methacrylate composition of the invention is suitable for laser engraving, and the surface of the product is easy to form a continuous smooth text or pattern, and is not easy to fall off.
  • the method of forming characters or patterns has a good environmental protection effect, the working efficiency can be increased by more than 30 times, the cost can be reduced by 10 times, the precision is high, and marks can be formed on the irregular plane, especially in the hidden places such as slits or openings. Security.
  • the text or pattern formed by the film is 50 times or more anti-wearing, is not easy to fall off, and has properties such as acid resistance, alkali resistance and oiliness, and is suitable for use in different regions and complex environments.
  • the components of the polymethyl methacrylate composition of the present invention are uniformly mixed in the particles to ensure uninterrupted lines of the engraved text or pattern. detailed description
  • the resin composition of the present invention (herein referred to as polymethyl methacrylate composition) mainly comprises the following mass percentage components:
  • Modified resin 5 ⁇ 70% Thermal stability difference pigment 0.1-5%
  • the main resin is polymethyl methacrylate PMMA
  • the modified resin is a mixture of one or several of polyethyl methacrylate or butyl acrylate, acrylate copolymer and acrylate rubber.
  • PMMA can be powdery or granular, and it has transparent gloss, strong rigidity, good abrasion resistance and good foaming properties.
  • Polyurethane or butyl acrylate, acrylate copolymer, acrylate rubber and other rubber properties with good elasticity and impact strength can change the softness and impact strength of PMMA to suit various moldings. More importantly, in combination with PMMA, the resin composition can be made into a translucent magnetic white color, which can be used as a base color.
  • Thermal stability of the pigment differs from the thermal stability of the resin composition, and there is a difference in thermal stability between the components of the composite pigment, which can be separated under transient heating conditions to produce different colors.
  • the role of the antioxidant is to inhibit the oxidative degradation of the polymer during the refining process, to prevent oxidation of the engraved part of the material during the laser engraving process, to avoid affecting the engraving effect, and the antioxidant is generally selected from a phenolic antioxidant or an amine antioxidant. .
  • the function of the heat stabilizer is to prevent thermal decomposition and heat aging during polymer processing, and to avoid affecting the engraving effect.
  • the heat stabilizer is generally selected from polyvinyl chloride or vinyl chloride copolymer.
  • the blowing agent can be azodicarbonamide or other blowing agents of the prior art.
  • Foaming agent 0.1 ⁇ 0.3%.
  • the processing method of the resin composition of the present invention mainly comprises the following steps: (1) grinding the main resin and the modified resin into a fine powder to facilitate thorough mixing with other components;
  • pellets of the composition formed by the above steps (4) and (5) may be directly packaged for sale, or may be directly formed into a plastic product as a raw material, and further comprise the following steps when forming the plastic product:
  • the molded product is engraved with a laser engraving machine to form a pattern or text, in which the power of the laser engraving machine can be selected to be 50W, and the laser speed can be selected as 7Kmm/s.
  • the resin composition of the present invention contains the following components and properties:
  • Butadiene has the property of softening PMMA and combining with PMMA to form a magnetic white color; therefore, the resin composition pellets produced by the above method have good foaming properties, and are present between the pigment and the resin composition itself and the composite pigment.
  • the difference in thermal stability At the high temperature of the laser scanning, the portion to be fired is rapidly heated and foamed, and the component with poor thermal stability of the pigment is separated from the component with high thermal stability to produce a heterochromatic color, so that the formation is constant.
  • the three-dimensional font or pattern is the three-dimensional font or pattern.
  • the product formed by using the composition is suitable for laser engraving to form smooth and continuous lines or patterns of various lines, such as black products can engrave white writing or patterns, purple products can engrave blue or red text or patterns, green products It can be engraved with yellow text or patterns, and dark blue can be engraved with purple and red.
  • the method for forming characters or patterns has a good environmental protection effect, the working efficiency can be improved by more than 30 times, the cost can be reduced by 10 times, the precision is high, and the irregularity can be performed on the irregular plane.
  • concealed portions such as slits or openings form marks for anti-counterfeiting.
  • the formed characters or patterns are 50 times or more anti-wearing properties, are not easy to fall off, and have properties such as acid resistance, alkali resistance and oiliness, and are suitable for use in different regions and complex environments.
  • the preparation method of the resin composition of the present invention is simple in process, and the composition of the formed particles is extremely uniform in mixing, ensuring uninterrupted lines of the engraved characters or patterns.
  • a resin composition of the present invention, a method for producing the same, and a method for producing the product will be described by taking a black product engraving to form a white character or a pattern.
  • the resin composition is blended in the following mass percentages:
  • the manufacturing method of the product includes the following steps:
  • step (3) injection molding the granule of step (3) into a telephone casing
  • the telephone casing is placed in a laser engraving machine and laser engraved at a power of 50 W and a laser speed of 7 Kmm/s to form a white number on the casing of the telephone, and white signs and patterns are formed on the casing of the telephone.
  • the principle of forming white numbers, signs and patterns is: At the high temperature of the laser scanning, the black telephone casing material is made of the resin and the carbon black pigment, and the thermal stability of the carbon black pigment is higher than that of the resin.
  • the composition under the instantaneous high-temperature scanning condition of the laser, the resin is instantaneously dissolved and foamed by heat, so that the magnetic white of the resin itself is separated from the carbon black powder, and the white component of the scanning portion is convex to produce a white handwriting or pattern with a three-dimensional effect.
  • a resin composition of the present invention, a method for producing the same, and a method for producing the product are illustrated by exemplifying a yellow text or a pattern in a light green product.
  • the resin composition is proportioned by the following mass percentages:
  • the green composite pigment with different thermal stability is made of titanium blue and yellow pigment in a green color of 3:1. If the product is to be engraved with yellow characters or patterns, the thermal stability of the yellow pigment in the composite pigment and the resin itself The thermal stability is the same, and their thermal stability is lower than that of the titanium cyanine pigment.
  • the manufacturing method of the product includes the following steps -
  • the material is selected and put into the kneading machine, and kneaded and kneaded in vacuum, high pressure, 200 ⁇ 220 ° C for 40 to 60 minutes, until plasticized into a homogenous hook;
  • the green plastic case is placed in a laser engraving machine and laser-engraved at a power of 50W and a laser speed of 7Kmm/s to form a yellow text or pattern on the plastic casing.
  • the principle of forming a yellow text or pattern is that the portion irradiated by the laser is instantaneously heated and foamed by the high temperature, and the yellow pigment and the magnetic white resin have the same melting point, the phase dissolves to form yellow, and the foaming action and the thermal stability are strong.
  • the blue phase separates to form a yellow text or pattern.

Description

聚甲基丙烯酸甲酯组合物、
其塑胶制品的制造方法及该组合物的应用
技术领域
本发明涉及一种用于制备卡片、 电话机、 电脑键盘、传真机等产品的塑胶 部件的树脂组合物及制备塑胶部件的方法, 该种树脂组合物适用于激光雕刻。 背景技术
制备卡片、 电话机、 电脑键盘、 传真机等产品的塑胶部件一般用 ABS、 HIPS (高抗冲聚苯乙烯树脂) 等树脂原料进行注塑成型。 但现有技术的这些 原料制成的塑胶部件其表面形成文字或图案时,一般只能用油墨丝印方法, 多 年传统不变的油印方法操作复杂, 工作效率太低, 成本过高, 造成环境污染, 产品不环保。 而且, 这种传统的油印方法无法在不规则平台上作业, 特别是在 狭缝或开孔等隐蔽处形成文字或图案时无法实现。另外, 油印方法形成的文字 或图案不具备耐酸、 碱、 油性, 耐磨性差, 易于脱落。 因为现有原料的限制, 成型后的塑胶制品无法适用激光雕刻形成连续光滑的文字或图案。 发明内容
本发明要解决的技术问题在于,针对现有技术的上述缺陷,提供一种其塑 胶制品表面易于形成连续光滑文字或图案且不易脱落的聚甲基丙烯酸甲酯组 合物、 其塑胶制品的制造方法及该组合物的应用。
本发明解决其技术问题所采用的技术方案是:提供一种聚甲基丙烯酸甲酯 组合物, 其包括以下质量百分数的成份:
主体树脂 25〜90%
改性树脂 5〜70%
热稳定性差异颜料 0.1~5%
其中, 主体树脂为聚甲基丙烯酸甲酯, 改性树脂为聚甲基丙烯酸乙酯或丁酯、 丙烯酸酯类共聚物、 丙烯酸酯橡胶中的一种或几种组成的混合物。 氧剂、热稳定剂和发泡剂, 所述热稳定性差异颜料的热稳定性与聚主体树脂有 差异, 复合颜料的各种颜料成份之间热稳定性存在差异。
所述聚甲基丙烯酸甲酯组合物是以下述方法制成的:
( 1 ) 将主体树脂及改性树脂粉磨成细粉状, 以利于与其它成份充分混合 均匀;
(2) 将细粉放入捏合机内, 加入热稳定性差异颜料, 在真空、 高压下加 热 200〜220°C进行捏合混炼 40〜60分钟, 直至塑炼成均匀的软体胶; 以及
(3 ) 将捏合后的软体胶用双辊炼机在 180〜200°C下进行塑炼,把软体胶压 成片状。
各组分的质量百分数为- 主体树脂 39〜70%
改性树脂 29〜60%
热稳定性差异颜料 0.1〜1.0%
抗氧剂 0.1〜0.3%
热稳定剂 0.1〜0.3%
发泡剂 0.1〜0.3%。
所述抗氧剂为酚类抗氧剂或胺类抗氧剂;热稳定剂为聚氯乙烯或氯乙烯共 聚物; 发泡剂是偶氮二甲酰胺。
本发明解决其技术问题所采用的另一技术方案是:提供一种塑胶制品的制 造方法, 主要包括以下步骤:
(1) 选用以下质量百分数的成份:
主体树脂 25〜90%
改性树脂 5〜70%
热稳定性差异颜料 0.1〜5% (2)将主体树脂及改性树脂混合进行粉磨成细粉状, 以利于与其它成份充 分混合均匀;
(3)将粉磨后的细粉放入捏合机内, 加入热稳定性差异颜料, 在真空、 高 压下加热捏合混炼, 直至塑炼成均匀的软体胶;
(4)将捏合后的软体胶用双辊炼机加热进行塑炼, 把软体胶压成片状, 冷 却后粉碎成颗粒; 以及
(5)将粒状组合物成型成塑胶制品。
所述的塑胶制品的制造方法, 进一步在步骤 (5 ) 之后包括:
(6)将成型的塑胶制品使用激光雕刻机雕刻形成图案或文字。
所述步骤(3 )在真空、 高压下加热 200〜220°C进行捏合混炼 40〜60分钟, 直至塑炼成均匀的软体胶; 所述步骤(4)双辊炼机在 180~20(TC下进行塑炼; 所述步骤 (6) 中, 激光雕刻机的功率选用 50W, 激光速度选用 7Kmm/s。
本发明还提供所述聚甲基丙烯酸甲酯组合物在激光雕刻中的应用。
所述聚甲基丙烯酸甲酯组合物激光雕刻形成图案或文字。
本发明的有益效果:本发明的聚甲基丙烯酸甲酯组合物成型的塑胶制品适 用于激光雕刻, 制品表面易于形成连续光滑文字或图案, 且不易脱落。形成文 字或图案的方法具有良好的环保作用, 工作效率可提高 30倍以上, 成本可降 低 10倍, 精度高, 可以在不规则平面上, 特别是狭缝或开孔等隐蔽处形成标 记用于防伪。 另外, 其形成的文字或图案抗磨性是油印的 50倍以上, 不易脱 落, 具有抗酸、 碱、 油性等性能, 适用不同地区和复杂环境使用。
本发明的聚甲基丙烯酸甲酯组合物颗粒中各成份混合极为均匀,确保所雕 刻的文字或图案的线条不间断。 具体实施方式
本发明树脂组合物(在此指聚甲基丙烯酸甲酯组合物)主要包括以下质量 百分数的组分: '
主体树脂 25〜90%
改性树脂 5〜70% 热稳定性差异颜料 0.1-5%
抗氧剂 0,1〜1%
热稳定剂 0.1-1%
发泡剂 0.1〜1%
其中, 主体树脂为聚甲基丙烯酸甲酯 PMMA, 改性树脂为聚甲基丙烯酸 乙酯或丁酯、丙烯酸酯类共聚物、丙烯酸酯橡胶中的一种或几种组成的混合物。
PMMA可为粉状或粒状, 其本身具有透明光泽性, 刚性强, 耐磨性好, 具有良好的发泡性。
聚甲基丙烯酸乙酯或丁酯、丙烯酸酯类共聚物、丙烯酸酯橡胶等具有弹性 和抗冲击强度好的橡胶方面的性质, 可以改变 PMMA的软性和抗冲击强度, 以适应各种成型,更重要的是与 PMMA结合可使树脂组合物成半透明磁白色, 可作为一种基础色。
热稳定性差异颜料的热稳定性与树脂组合物热稳定性存在差异,且复合颜 料各成份之间的热稳定性存在差异,其能够在瞬间受热的条件下发生分离,产 生不同的颜色。
抗氧剂的作用是抑制聚合物在制炼过程中氧化降解,在激光雕刻过程中阻 止被雕刻部分材料氧化,避免影响雕刻效果,抗氧剂一般选用酚类抗氧剂或胺 类抗氧剂。热稳定剂的作用是防止聚合物加工时热分解和热老化,避免影响雕 刻效果, 热稳定剂一般选用聚氯乙烯或氯乙烯共聚物。发泡剂可以是偶氮二甲 酰胺或现有技术的其它发泡剂。
上述组合物的优选配方中各组份的质量百分含量为:
主体树脂 39~70%
改性树脂 29~60%
热稳定性差异颜料 0.1-1.0%
抗氧剂 0.1〜0.3%
热稳定剂 0.1~0.3%
发泡剂 0.1〜0.3%。
本发明的树脂组合物的加工方法主要包括以下步骤: ( 1 ) 将主体树脂及改性树脂粉磨成细粉状, 以利于与其它成份充分混合 均匀;
(2) 将细粉放入捏合机内,加入热稳定性差异颜料、抗氧剂、热稳定剂、 发泡剂等, 根据需要还可加入其它助剂, 在真空、 髙压下加热 200〜220°C进行捏合混炼 40〜60分钟, 直至塑炼成均匀的软体胶;
(3 ) 将捏合后的软体胶用双辊炼机在 180~200°C下进行塑炼, 把软体胶 压成片状;
(4) 冷却片状胶块, 并粉碎形成细小的片状颗粒;
(5 ) 使用抽粒机混炼拉线将细小片状切成规范的粒状。
上述(4)、 ( 5 )步骤形成的组合物粒料可直接包装出售, 也可以其为原料 直接成型在塑胶制品, 制成塑胶制品时进一步包括以下步骤:
(6) 将粒状树脂组合物注塑成型或现有技术的其它成型方法形成制品, 如注塑成电话机、 手机、 计算器等的塑胶件;
(7) 将成型的产品使用激光雕刻机雕刻形成图案或文字, 其中激光雕刻 机的功率可选用 50W, 激光速度可选用 7Kmm/s。
因本发明的树脂组合物中含有如下成份及性能:
( 1 ) 热稳定性差异颜料;
(2) PMMA本身具有良好发泡性;
(3 ) 丁二烯具有软化 PMMA并与 PMMA结合成磁白色的性能; 因此,上述方法制成的树脂组合物粒料具有良好的发泡性,颜料与树脂组 合物本身及复合颜料之间存在着热稳定性差异。在激光扫射的瞬间高温下, 使 被扫射的部位产生快速受热发泡,且使颜料热稳定性较差的组分与热稳定性强 的组分发生分离, 从而产生异色, 因此形成具有一定的立体感的字体或图案。
使用该组合物成型后的产品适用于激光雕刻形成各种线条光滑连续的文 字或图案, 如黑色产品可雕刻出白色字迹或图案, 紫色产品可雕刻出蓝色或红 色的文字或图案, 绿色产品可雕刻出黄色文字或图案,深蓝色可雕刻出紫红色 等。 与传统油印方法相比较, 该形成文字或图案的方法具有良好的环保作用, 工作效率可提高 30倍以上,成本可降低 10倍,精度高,可以在不规则平面上, 特别是狭缝或开孔等隐蔽处形成标记用于防伪。另外, 其形成的文字或图案抗 磨性是油印的 50倍以上, 不易脱落, 具有抗酸、 碱、 油性等性能, 适用不同 地区和复杂环境使用。
本发明的树脂组合物的制备方法工艺简单,形成的组合物颗粒中各成份混 合极为均匀, 确保所雕刻的文字或图案的线条不间断。 本例以黑色产品雕刻形成白色文字或图案为例说明本发明的树脂组合物、 其制备方法以及产品的制造方法。 其中树脂组合物按以下质量百分数进行配 比:
聚甲基丙烯酸甲酯 75%
聚甲基丙烯酸乙酯 24.5%
热稳定性好的黑色颜料 0.5%
产品的制造方法包括以下步骤:
( 1 ) 按上述配方选择物料投入捏合机内, 在真空、 高压、 200~220°C下 进行捏合混炼 40~60分钟, 直至塑炼成均匀的软体胶;
(2) 将捏合后的软体胶用双辊炼机在 180〜200°C的加热条件下进行塑 炼, 把软体胶压成片状;
(3 ) 冷却片状胶块, 并粉碎形成细小的片状颗粒;
(4) 以步骤 (3 ) 的颗粒为原料注塑成电话机外壳;
(5 ) 将电话机外壳放入激光雕刻机, 以功率 50W, 激光速度 7Kmm/s进 行激光雕刻, 从而在电话机外壳上形成白色数字, 且在电话外壳上 还形成白色标志和图案。
形成白色数字、标志和图案的原理是: 在激光扫射的瞬间高温下, 该黑色 的电话机外壳材料是该树脂本色加碳黑色颜料制成,其选用碳黑色颜料的热稳 定性高于该树脂组合物, 在激光的瞬间高温扫射条件下,树脂瞬间受热溶解发 泡,使树脂本身磁白色与碳黑色粉相分离, 扫射部位白色成份凸出产生具有立 体感的白色字迹或图案。 本例以浅绿色产品雕刻出黄色文字或图案为例说明本发明的树脂组合物、 其制备方法以及产品的制造方法。 其中树脂组合物按以下质量百分数进行配 比:
聚甲基丙烯酸甲酯 75%
聚甲基丙烯酸丁酯 24.5%
绿色复合颜料 0.5%
该热稳定性差异的绿色复合颜料, 是由钛青兰和黄色颜料按 3: 1制成绿 色,若要使产品雕刻出黄色文字或图案, 则复合颜料中黄色颜料的热稳定性与 树脂本身热稳定性相同易溶, 并且它们的热稳定性低于钛青兰颜料。
产品的制造方法包括以下步骤-
( 1 ) 按上述配方选择物料投入捏合机内, 在真空、 高压、 200〜220°C下 进行捏合混炼 40〜60分钟, 直至塑炼成均勾的软体胶;
(2) 将捏合后的软体胶用双辊炼机在 180〜200°C的加热条件下进行塑 炼, 把软体胶压成片状;
(3 ) 冷却片状胶块, 并粉碎形成细小的片状颗粒;
(4) 以步骤 (3 ) 的颗粒为原料进行注塑成绿色塑胶外壳;
( 5 ) 将绿色塑胶外壳放入激光雕刻机, 以功率 50W, 激光速度 7Kmm/s 进行激光雕刻, 从而在塑胶外壳上雕刻形成黄色文字或图案。
其形成黄色文字或图案的原理是:利用激光扫射的部位瞬间高温受热溶解 发泡, 黄色颜料与磁白色树脂它们的溶点相同, 相溶解形成黄色, 在发泡作用 下与热稳定性强的兰色相分离, 形成黄色的文字或图案。

Claims

权利要求书
1、 聚甲基丙烯酸甲酯组合物, 其包括以下质量百分数的成份:
主体树脂 25〜90%
改性树脂 5〜70%
热稳定性差异颜料 0.1〜5%
其中,主体树脂为聚甲基丙烯酸甲酯,改性树脂为聚甲基丙烯酸乙酯或丁 酯、 丙烯酸酯类共聚物、 丙烯酸酯橡胶中的一种或几种组成的混合物。
2、 根据权利要求 1所述的聚甲基丙烯酸甲酯组合物, 其特征在于: 所述 组合物进一步包括质量百分数分别为 0.1〜1%的抗氧剂、 热稳定剂和发泡剂, 所述热稳定性差异颜料的热稳定性与主体树脂有差异,复合颜料各种颜料成份 之间热稳定性存在差异。
3、 根据权利要求 1所述的聚甲基丙烯酸甲酯组合物, 其特征在于: 所述 组合物是以下述方法制成的:
( 1 ) 将主体树脂及改性树脂粉磨成细粉状, 以利于与其它成份充分混合 均匀;
(2) 将细粉放入捏合机内, 加入热稳定性差异颜料, 在真空、 高压下加 热 200〜220°C进行捏合混炼 40〜60分钟, 直至塑炼成均匀的软体胶; 以及
( 3 ) 将捏合后的软体胶用双辊炼机在 180〜200°C下进行塑炼,把软体胶压 成片状。
4、 根据权利要求 1至 3中任一项所述的聚甲基丙烯酸甲酯组合物, 其特 征在于: 各组分的质量百分数为:
主体树脂 39〜70%
改性树脂 29 60%
热稳定性差异颜料 0.1〜1.0%
抗氧剂 0.1-0.3% 热稳定剂 0.1〜0.3%
发泡剂 0.1〜0.3%。
5、 据权利要求 4所述的聚甲基丙烯酸甲酯组合物, 其特征在于: 所述抗 氧剂为酚类抗氧剂或胺类抗氧剂; 热稳定剂为聚氯乙烯或氯乙烯共聚物; 发泡 剂是偶氮二甲酰胺。
6、 塑胶制品的制造方法, 主要包括以下步骤:
( 1 ) 选用以下质量百分数的成份:
主体树脂 25~90%
改性树脂 5~70%
热稳定性差异颜料 0.1〜5%
其中,主体树脂为聚甲基丙烯酸甲酯,改性树脂为聚甲基丙烯酸乙酯 或丁酯、丙烯酸酯类共聚物、丙烯酸酯橡胶中的一种或几种组成的混 合物;
(2) 将主体树脂及改性树脂混合进行粉磨成细粉状, 以利于与其它成份 充分混合均匀;
(3 ) 将粉磨后的细粉放入捏合机内, 加入热稳定性差异颜料, 在真空、 高压下加热捏合混炼, 直至塑炼成均匀的软体胶;
(4) 将捏合后的软体胶用双辊炼机加热进行塑炼, 把软体胶压成片状, 冷却后粉碎成颗粒; 以及
( 5 ) 将粒状组合物成型成塑胶制品。
7、 根据权利要求 6所述的塑胶制品的制造方法, 其特征在于: 进一步在 步骤 (5 ) 之后包括:
(6) 将成型的塑胶制品使用激光雕刻机雕刻形成图案或文字。
8、 根据权利要求 7所述的塑胶制品的制造方法, 其特征在于: 所述步骤 (3 ) 在真空、 高压下加热 200〜220°C进行捏合混炼 40~60分钟, 直至塑炼成 均匀的软体胶; 所述步骤 (4) 双辊炼机在 180〜200 C下进行塑炼; 所述步骤 (6) 中, 激光雕刻机的功率选用 50W, 激光速度选用 7Kmm/s。
9、 根据权利要求 6所述的塑胶制品的制造方法, 其特征在于: 所述树脂 组合物进一步包括质量百分数分别为 0.1〜1%的抗氧剂, 热稳定剂和发泡剂, 所述热稳定性差异颜料的热稳定性与聚甲基丙烯酸甲酯有差异,复合颜料的各 种颜料成份之间热稳定性存在差异。
10、根据权利要求 6至 9中任一项所述的塑胶制品的制造方法,其特征在 于: 各组分的质量百分数为:
主体树脂 39〜70%
改性树脂 29〜60%
热稳定性差异颜料 0.1-1.0%
抗氧剂 0.1〜0.3%
热稳定剂 0.1〜0.3%
发泡剂 0.1〜0.3%。
11、 根据权利要求 10所述的塑胶制品的制造方法, 其特征在于: 所述抗 氧剂为酚类抗氧剂或胺类抗氧剂; 热稳定剂为聚氯乙烯或氯乙烯共聚物; 发泡 剂是偶氮二甲酰胺。
12、 权利要求 1的聚甲基丙烯酸甲酯组合物在激光雕刻中的应用。
13、 根据权利要求 12所述的聚甲基丙烯酸甲酯组合物在激光雕刻中的应 用, 其特征在于, 所述聚甲基丙烯酸甲酯组合物激光雕刻形成图案或文字。
14、 根据权利要求 12所述的聚甲基丙烯酸甲酯组合物在激光雕刻中的应 用, 其特征在于: 所述组合物迸一步包括质量百分数分别为 0.1〜1%的抗氧剂、 热稳定剂和发泡剂, 所述热稳定性差异颜料的热稳定性与主体树脂有差异, 复 合颜料各种颜料成份之间热稳定性存在差异。
15、 根据权利要求 12所述的聚甲基丙烯酸甲酯组合物在激光雕刻中的应 用, 其特征在于: 所述组合物是以下述方法制成的:
( 1 ) 将主体树脂及改性树脂粉磨成细粉状, 以利于与其它成份充分混合 均匀; (2 ) 将细粉放入捏合机内, 加入热稳定性差异颜料, 在真空、 高压下加 热 200~220°C进行捏合混炼 40〜60分钟, 直至塑炼成均匀的软体胶; 以及
(3 ) 将捏合后的软体胶用双辊炼机在 180~200°C下进行塑炼, 把软体胶 压成片状。
16、根据权利要求 12至 15中任一项所述的聚甲基丙烯酸甲酯组合物在激 光雕刻中的应用, 其特征在于: 各组分的质量百分数为- 主体树脂 39~70%
改性 脂 29〜60%
热稳定性差异颜料 0.1〜1.0%
抗氧剂 0.1〜0.3%
热稳定剂 0.1〜0.3%
发泡剂 0.1〜0.3%。
17、 根据权利要求 16所述的聚甲基丙烯酸甲酯组合物在激光雕刻中的应 用, 其特征在于: 所述抗氧剂为酚类抗氧剂或胺类抗氧剂; 热稳定剂为聚氯乙 烯或氯乙烯共聚物; 发泡剂是偶氮二甲酰胺。
PCT/CN2007/001663 2006-05-22 2007-05-22 Composition de pmma, procédé de fabrication d'un article plastique à partir de cette composition et utilisation de la composition WO2007134543A1 (fr)

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