A kind of natural rubber packaging adhesive and preparation method thereof
Technical field
The present invention relates to a kind of chemical materials, more specifically relate to a kind of tackiness agent.
Background technology
At present, be used for cardboard box glue stick kind a lot, three-aldehyde glue and white glue with vinyl etc. are arranged.Some tackiness agent can discharge free state formaldehyde in production and application process, serious to human body and environmental hazard; Some tackiness agent, water tolerance and wet fastness are poor, easily moisture absorption in damp atmosphere, bonding strength is not high; At high temperature use to produce creep, Joint strength is descended, storing easy freezing below-5 ℃, emulsion is damaged, therefore cause its application greatly limited.The bonding strength that needs research to make new advances is high, the tackiness agent of safety and environmental protection, good stability.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of natural rubber packaging adhesive and preparation method thereof is provided.
Technical scheme of the present invention is as follows:
A kind of natural rubber packaging adhesive is characterized in that being made by the raw material of following weight part: nature rubber latex 5-6, carboxymethyl cellulose 3-4, Starso 5-7, titanium dioxide 3-4, Sodium hexametaphosphate 99 5-7, water-based hydroxyl polyurethane 4-5, pure acrylic latex 8-10, EDTA four sodium 2-3, alum powder 2-3, Potassium Persulphate 1-2, polyvinyl acetate emulsion 5-6, morpholine 1-2, water 100-120.
2, the preparation method of carton polystyrene adhesive according to claim 1, it is characterized in that may further comprise the steps: (1), alum powder, titanium dioxide, Starso, Sodium hexametaphosphate 99 are added to the water, be heated to 80-90 ℃, dissolving, add again carboxymethyl cellulose, water-based hydroxyl polyurethane, morpholine and Potassium Persulphate, stirring reaction 2-3 hour;
(2), other leftover materials are mixed, stirred 15-20 minute;
(3), with step (1), (2) mixing of materials, be heated to 60-65 ℃, stirring reaction 2-3 hour, and get final product.
For as main raw material, safety is used in nontoxic, environmental protection take nature rubber latex in the present invention, can effectively solve shortcoming that existing packed in cases glue paste has such as intensity low, water-fast not good etc., has widely promotion and application to be worth.
Embodiment
A kind of natural rubber packaging adhesive is made by the raw material of following weight part (kilogram): nature rubber latex 5, carboxymethyl cellulose 4, Starso 5, titanium dioxide 4, Sodium hexametaphosphate 99 7, water-based hydroxyl polyurethane 5, pure acrylic latex 8, EDTA four sodium 2, alum powder 2, Potassium Persulphate 2, polyvinyl acetate emulsion 5, morpholine 1, water 100-120.
The preparation method of described natural rubber packaging adhesive may further comprise the steps:
(1), alum powder, titanium dioxide, Starso, Sodium hexametaphosphate 99 are added to the water, be heated to 80-90 ℃, dissolving adds carboxymethyl cellulose, water-based hydroxyl polyurethane, morpholine and Potassium Persulphate, stirring reaction 2-3 hour again;
(2), other leftover materials are mixed, stirred 15-20 minute;
(3), with step (1), (2) mixing of materials, be heated to 60-65 ℃, stirring reaction 2-3 hour, and get final product.
The tackiness agent of the present invention's preparation, through detecting: after 4 hours, bonding strength reaches 23Mpa, water-tolerant.After bonding, put into 40 ℃ of water and soaked 2 hours, bonding strength is 17 Mpa.