PRESSURE SENSITIVE ADHESIVE PARTICLE AND METHOD OF PRODUCING PRINTED MATTER
A pressure sensitive adhesive particle includes a styrene resin; and a (meth)acrylate resin, wherein the (meth)acrylate resin contains two kinds of (meth)acrylates as a polymerization component in which the weight proportion of the (meth)acrylate to the total polymerization components is 90% by weight or more, and has two glass transition points in which a difference between the lowest glass transition temperature and the highest glass transition temperature is 30° C. or higher.
1 . A pressure sensitive adhesive particle comprising:
a styrene resin; and
a (meth)acrylate resin,
wherein the (meth)acrylate resin contains two kinds of (meth)acrylates as a polymerization component, with a weight proportion of the (meth)acrylates to a total polymerization components being 90% by weight or more, and has two glass transition points, with a difference between a lowest glass transition temperature and a highest glass transition temperature being 30° C. or higher.
2 . The pressure sensitive adhesive particle according to claim 1 ,
wherein a weight proportion of styrene to total polymerization components for the styrene resin is from 60% by weight to 95% by weight.
3 . The pressure sensitive adhesive particle according to claim 1 ,
wherein a weight ratio among the two kinds of (meth)acrylates as the polymerization components for the (meth)acrylate resin is from 80:20 to 20:80.
4 . The pressure sensitive adhesive particle according to claim 1 ,
wherein a difference in carbon number between alkyl groups of the two kinds of the alkyl (meth)acrylates as the polymerization components for the (meth)acrylate resin is from 1 to 4.
5 . The pressure sensitive adhesive particle according to claim 1 ,
wherein the styrene resin further contains a (meth)acrylate as the polymerization component.
6 . The pressure sensitive adhesive particle according to claim 5 ,
wherein the (meth)acrylate which is a polymerization component for the styrene resin is selected from n-butyl acrylate or 2-ethyl hexyl acrylate.
7 . The pressure sensitive adhesive particle according to claim 5 ,
wherein the styrene resin and the (meth)acrylate resin contain the same (meth)acrylate as the polymerization component.
8 . The pressure sensitive adhesive particle according to claim 1 ,
wherein the (meth)acrylate resin contains 2-ethyl hexyl acrylate and n-butyl acrylate as the polymerization component.
9 . The pressure sensitive adhesive particle according to claim 1 ,
wherein a content of the styrene resin is larger than a content of the (meth)acrylate resin.
10 . The pressure sensitive adhesive particle according to claim 1 , further comprising:
a sea phase that contains the styrene resin; and
an island phase that contains the (meth)acrylate resin dispersed in the sea phase.
11 . The pressure sensitive adhesive particle according to claim 10 ,
wherein an average diameter of the island phases is from 200 nm to 500 nm.
12 . The pressure sensitive adhesive particle according to claim 1 , further comprising:
a core portion that contains the styrene resin and the (meth)acrylate resin and a shell layer that covers the core portion.
13 . The pressure sensitive adhesive particle according to claim 12 ,
wherein the shell layer contains the styrene resin.
14 . The pressure sensitive adhesive particle according to claim 1 ,
wherein a temperature at which the pressure sensitive adhesive particle has a viscosity of 10,000 Pa·s under a pressure of 4 MPa is 90° C. or lower.
15 . The pressure sensitive adhesive particle according to claim 1 , further comprising:
silica particles having an average primary particle diameter of 1 nm to 300 nm or titanium oxide particles as an external additive.
16 . The pressure sensitive adhesive particle according to claim 15 ,
wherein an average primary particle diameter of the titanium oxide particles is from 10 nm to 100 nm.
17 . The pressure sensitive adhesive particle according to claim 15 ,
wherein an external addition amount of the silica particles is 1 part by weight to 3 parts by weight with respect to 100 parts by weight of adhesive mother particles included in the pressure sensitive adhesive particle.
18 . The pressure sensitive adhesive particle according to claim 15 ,
wherein a content of the titanium oxide particles is 0.5 parts by weight to 5 parts by weight with respect to 100 parts by weight of adhesive mother particles included in the pressure sensitive adhesive particle.
19 . A method of producing a printed matter, the method comprising:
arranging a pressure sensitive adhesive particle according to claim 1 on a recording medium; and
folding and pressure-bonding the recording medium or stacking and pressure-bonding the recording medium and another recording medium.