阅读说明：本技术 一种载带封装用纸板专用复合乳液 (Special composite emulsion for carrier tape packaging paperboard ) 是由 施晓旦 廖秀弛 于 2021-08-27 设计创作，主要内容包括：本发明提供了一种载带封装用纸板专用复合乳液,包含重量百分比为5-40％的聚乙烯醇、5-50％的苯乙烯丙烯酸酯乳液、5-50％的丁二烯苯乙烯乳液、5-30％的淀粉糊液、1-5％的润滑剂,各组分重量百分比之和为100％。使用本发明载带封装用纸板专用复合乳液直接对载带原纸进行表面施涂,可大幅度提高纸张的表面强度和平滑度、显著改善纸张掉粉,有效降低纸张和封带的剥离力。(The invention provides a special composite emulsion for carrier tape packaging paper boards, which comprises 5-40 wt% of polyvinyl alcohol, 5-50 wt% of styrene acrylate emulsion, 5-50 wt% of butadiene styrene emulsion, 5-30 wt% of starch paste and 1-5 wt% of lubricant, wherein the sum of the weight percentages of the components is 100%. The special composite emulsion for the paperboard for packaging the carrier tape directly coats the surface of the base paper of the carrier tape, so that the surface strength and smoothness of the paper can be greatly improved, the powder falling of the paper can be obviously improved, and the stripping force of the paper and a sealing tape can be effectively reduced.)

1. The special composite emulsion for the paper board for carrier tape packaging is characterized by comprising the following components in percentage by weight: 5-40% of polyvinyl alcohol, 5-50% of styrene acrylate emulsion, 5-50% of butadiene styrene emulsion, 5-30% of starch paste liquid and 1-5% of lubricant, wherein the sum of the weight percentages of the components is 100%.

2. The composite emulsion for the paper board for tape carrier packaging as claimed in claim 1, wherein the viscosity of the polyvinyl alcohol is 10-50cP, the alcoholysis degree is 90-99.9%, the pH is 5-7, the ash content is less than 0.5 wt%, and the volatile component is less than 5 wt%.

3. The composite emulsion for a paper board for tape carrier packaging as claimed in claim 1, wherein the glass transition temperature of the styrene acrylate emulsion is in the range of-20-50 ℃ and the particle size is in the range of 90-200 nm.

4. The composite emulsion for a paper board for tape carrier packaging as claimed in claim 1, wherein the butadiene styrene emulsion has a glass transition temperature in the range of-20 to 30 ℃ and a particle size in the range of 90 to 200 nm.

5. The composite emulsion for a paperboard for tape carrier packaging as claimed in claim 1, wherein the lubricant is one or more selected from calcium stearate lubricant, zinc stearate lubricant, and magnesium stearate lubricant.

6. The special composite emulsion for the paper board for tape carrier packaging as claimed in claim 1, wherein the special composite emulsion for the paper board for tape carrier packaging is composed of the following components by weight percentage: 5-25% of polyvinyl alcohol, 20-50% of styrene acrylate emulsion, 5-50% of butadiene styrene emulsion, 5-20% of starch paste liquid and 1-5% of lubricant, wherein the sum of the weight percentages of the components is 100%.

7. The preparation method of the special composite emulsion for the paper board for tape carrier packaging, which is characterized by comprising the following steps: mixing polyvinyl alcohol, styrene acrylate emulsion, butadiene styrene emulsion, starch paste and a lubricant according to the proportion, and stirring for 1-2 hours to obtain the composite emulsion.

8. The use of the composite emulsion special for the paper carrier tape packaging paper board as described in any one of claims 1 to 6 in the preparation of paper carrier tape, characterized in that the composite emulsion special for the paper carrier tape packaging paper board is applied on the surface of the carrier tape base paper, and the coating amount is 5-8g/m²。

Technical Field

The invention relates to the technical field of paper carrier tape preparation, in particular to a special composite emulsion for a paperboard for carrier tape packaging.

Background

The carrier tape packaging paper board used in the market at present is mainly produced by national monopoly such as Japan and the like, is mainly used for packaging carriers of SMD components such as resistors, capacitors, diodes, relays, mobile phone parts and the like, and the paper carrier tape is used, so that the carrier tape has the advantages of low cost, good paper resilience, environment-friendly recovery of paper materials and the like.

Disclosure of Invention

In order to solve the problems, the invention provides the special composite emulsion for the paper board for the tape carrier package.

The invention is realized by adopting the following technical scheme:

the special composite emulsion for the paper board for carrier tape packaging comprises the following components in percentage by weight: 5-40% of polyvinyl alcohol, 5-50% of styrene acrylate emulsion, 5-50% of butadiene styrene emulsion, 5-30% of starch paste liquid and 1-5% of lubricant, wherein the sum of the weight percentages of the components is 100%.

The polyvinyl alcohol has a viscosity of 10-50cP (4 wt% aqu), an alcoholysis degree of 90-99.9%, a pH of 5-7, an ash content of less than 0.5 wt%, and a volatile content of less than 5 wt%. The degree of alcoholysis is preferably from 95 to 99.5%, particularly preferably 99.5%.

The styrene acrylate emulsion is a polymerization emulsion prepared by conventional emulsion polymerization of raw materials at least containing (methyl) styrene monomers and (methyl) acrylate monomers. The (meth) acrylate monomer may be selected from methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate or isooctyl methacrylate. The polymerization raw materials may optionally contain other functional monomers such as cationic monomers, crosslinking monomers, etc., which are commonly used in the art. Preferably, the glass transition temperature of the styrene acrylate emulsion is in the range of-20-50 ℃, and the particle size is in the range of 90-200 nm.

The butadiene styrene emulsion is a polymerization emulsion prepared by conventional emulsion polymerization of raw materials at least containing butadiene monomers and (methyl) styrene monomers. The polymerization raw materials may optionally contain other functional monomers such as cationic monomers, crosslinking monomers, etc., which are commonly used in the art. Preferably, the butadiene styrene emulsion has a glass transition temperature in the range of-20 to 30 ℃ and a particle size in the range of 90 to 200 nanometers.

The starch paste is a 10% starch hydrated gel prepared by pasting starch.

The lubricant may be selected from lubricants commonly used in the art, such as, but not limited to, calcium stearate lubricant, zinc stearate lubricant, magnesium stearate lubricant, or a combination of any two or more thereof.

As a preferred technical scheme, the special composite emulsion for the carrier tape packaging paperboard comprises the following components in percentage by weight: 5-25% of polyvinyl alcohol, 20-50% of styrene acrylate emulsion, 5-50% of butadiene styrene emulsion, 5-20% of starch paste liquid and 1-5% of lubricant, wherein the sum of the weight percentages of the components is 100%.

The second aspect of the invention provides a method for preparing the composite emulsion special for the carrier tape packaging paperboard, which comprises the following steps: mixing polyvinyl alcohol, styrene acrylate emulsion, butadiene styrene emulsion, starch paste and a lubricant according to the proportion, and stirring for 1-2 hours to obtain the composite emulsion.

The third aspect of the invention provides the application of the special composite emulsion for the paper board for carrier tape packaging in the preparation of paper carrier tapes, wherein the special composite emulsion for the paper board for carrier tape packaging is coated on the surface of the base paper of the carrier tape, and the coating amount is 5-8g/m². Indexes such as paper stiffness, surface strength, smoothness and the like of the base paper of the carrier tape after being coated on the surface are obviously improved, the performances such as paper powder falling and the like can be reduced, and the standard of a paperboard for carrier tape packaging is met.

When in use, the special composite emulsion for the carrier tape packaging paperboard is milky polymer emulsion. The composite emulsion is directly applied to the surface of paper, so that the surface strength and smoothness of the paper can be greatly improved, the powder falling of the paper is obviously improved, and the stripping force of the paper and a sealing tape is effectively reduced.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are intended to be illustrative only and are not intended to be limiting as other obvious modifications may occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

The apparatus or raw materials in the present invention are not indicated by manufacturers, and are all conventional commercial apparatuses or raw materials. The main instruments and raw materials used in the following examples were as follows:

raw materials: the polyvinyl alcohol is ELVANOL polyvinyl alcohol of Colorado company; the starch paste is prepared by conventional gelatinization of Xilai surface sizing starch; styrene acrylate emulsion BS823ECO, butadiene styrene emulsion BS5000H, lubricant (calcium stearate lubricant), and the like are all commercially available products of Jiningmingsheng New Material Co., Ltd.

The instrument comprises the following steps: a 1000 liter reaction kettle, a weighbridge, a thermometer, a peeling force tester, a balance, a wax rod (16A-18A) Taber abrasion resistance instrument and a Buick smoothness instrument.

If the detection indexes related in the embodiment of the invention are not mentioned, the detection is carried out by adopting a conventional detection method in the field, and the specific index detection method is as follows:

1. quantitative GB T451.2-1989 paper and paperboard quantitative determination standard

2. Caliper reference GBT451.3-1989 method for measuring caliper of paper and board

3. Peel force, ASTM D3330 pressure sensitive tape Peel Strength test Standard

4. Surface Strength reference GB-T22837 & 2008 & paper & cardboard surface Strength determination (wax rod method)

5. Measurement of stiffness reference GB/T22364-

6. Smoothness determination with reference to GBT 456-

7. And (3) paper powder detection refers to the operating specification of a Taber abrasion resistance instrument, 5000 turns are set, and a grinding wheel is used for rubbing the surface of the paper, so that the weight ratio of the falling powder of the paper is increased.

Example 1

In a 1000L reaction kettle, 25% of polyvinyl alcohol, 20% of styrene acrylate emulsion, 30% of butadiene styrene emulsion, 20% of starch paste and 5% of lubricant are mixed, and the mixture is stirred for 2 hours through the reaction kettle to finally obtain the composite emulsion.

Example 2

In a 1000L reaction kettle, 5% of polyvinyl alcohol, 40% of styrene acrylate emulsion, 49% of butadiene styrene emulsion, 5% of starch paste and 1% of lubricant are mixed, and the mixture is stirred for 1 hour through the reaction kettle to finally obtain the composite emulsion.

Example 3

In a 1000L reaction kettle, 10% of polyvinyl alcohol, 50% of styrene acrylate emulsion, 8% of butadiene styrene emulsion, 20% of starch paste and 2% of lubricant are mixed, and the mixture is stirred for 1 hour through the reaction kettle to finally obtain the composite emulsion.

Comparative example 1

Styrene acrylate emulsion.

Comparative example 2

In a 1000L reaction kettle, 25% of polyvinyl alcohol, 50% of styrene acrylate emulsion, 20% of starch paste and 5% of lubricant are mixed, and stirred for 2 hours through the reaction kettle to finally obtain the composite emulsion.

Comparative example 3

In a 1000L reaction kettle, 25% of polyvinyl alcohol, 50% of butadiene styrene emulsion, 20% of starch paste and 5% of lubricant are mixed, and stirred for 2 hours through the reaction kettle to finally obtain the composite emulsion.

The emulsions obtained in examples 1 to 3 and comparative examples 1 to 3 were applied to the base paper of a carrier tape in an amount of 5 to 7g/m²The paper samples are respectively numbered from E1 to E3 and from C1 to C3 when 5 tons of paper are respectively tried. The experimental detection results are as follows:

compared with the common sizing emulsion (comparative example 1), the special composite emulsion is coated on the surface of the paper, the quantification and the thickness are not changed, the special composite emulsion improves the indexes of paper stiffness, surface strength, smoothness and the like, reduces the performances of paper powder falling and the like, and meets the standard of paper boards for carrier tape packaging. Compared with the sizing emulsion (comparative examples 2 and 3) which uses the styrene acrylate emulsion alone or the butadiene styrene emulsion alone in the formula, the composite emulsion of the invention has more remarkable improvement on paper dusting, and the peeling force of the packaging adhesive tape is obviously reduced, thereby showing that the excellent synergistic effect exists between the two polymerization emulsions.

The paper patterns E1-E3 balance moisture of carrier paper for one month at a client, then the paper is punched and cut, SMD components are packaged and tried, and the SMT system of the client can run normally.

It will be appreciated by persons skilled in the art that the above examples are given by way of illustration only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.